sauravdx007 I am not getting the question., Can anyone please explain what I need to do?
andythedandyone you are not alone... :P the question is a riddle itself.
abhaynabby1 it's a simple ques. you just need to print the series. look at series.. scan num=a and add 2^n.b and print.. as simple.
pabitrap03 i didn't get the why query (q) is used for can you please explain
sumit2303 the question checks the impllementation of loops. we have to run through a,b and n to get the desired output. Query specifies how many times we have to print the sequences.
You can break the problem by first getting one sequence, and then running it q times over.
arpan673523 it show that how many lines of geometric series will come (a+b(2^n-1))
ketanjoshi4477 it is just the no. of test cases.
cs_ankitprajapa1 Everything is fine.. but what is q here.??
sanjanarocks97 i think q is used for number of series you want to print . Sample Input
2 0 2 10 5 3 5here q=2 . which means 2 series. in 1st series a=0 b=2 n=10 and in 2nd a=5 b=3 c=5. i hope i m correct. (Newbie here)
arpan673523 yes you got it right
juliusmeldrin On the first series you have n and the second you have c? explain please
rohit8366 I think that is a typing error, in the second series the values are a=5, b=3 and n=5.
Hope this helps!!!!
devendra_singh91 in the given test case q=2 an in next q=3 i.e. a+q^0b+q^1b.....
ttanmayddas12 but sir this solution is not satisfying all the test cases.
devendra_singh91 i mean first you have to calculate the first term then see that the first term is common in all terms so you have to just appy a loop after that , and in that loop i have told that what we have to perform. Now just simply iterate that loop and multilpy that first term to the matter that you calculated inside the loop.
ashantanu821 u are correct bro..but i amnot getting the array declaration in java..can you help me?
abhaynabby1 it's a simple ques. you just need to print the series. look at series.. scan num=a and add 2^n.b and print.. as simple.
kajulnisha_15cs how i can increment the number 'n' value for getting the series, i dont know how to put loop for this, can anyone plz help me
rohit8366 Hey,
Just keep on trying, the answer will come up, my algorithm was something like this create a "cumulative" variable and set it equal to user input "a" Inside the INPUT FOR Loop 1)Create a new for loop for a variable say "j", start it from 0 to n where n is the input provided by user and already written in the code. 2)compute the part of (2^j)*b and store it in a variable say "res". 3) Now simply add the equation to the cumulative variable -> cumulative=cumulative+res(refer step 2) 4) Print (cumulative+" ") 5) Close for loop 6) user proper Println syntax tomove cursor to next line.
devendra_singh91 i mean first you have to calculate the first term then see that the first term is common in all terms so you have to just appy a loop after that , and in that loop i have told that what we have to perform. Now just simply iterate that loop and multilpy that first term to the matter that you calculated inside the loop.
anujdada532 same with me
ttanmayddas12 but it doesn't pass through all the test cases.
arpan673523 Riddle is solved, Check the solution above
anmolpal1999 [deleted]
nherron You have to look at the equation at the top. That is the trickiest part.
satya_chk a+2^0*b+2^1*b+2^2*b+2^3*b+........+2^n-1*b
In every Iteration you should add previous result so that you would get result .................................... 1st Iteration: result=a+2^0*b ......................... 2nd Iteration: result = result + (2^1)*b ......................... 3rd Iteration: result =result + (2^2)*b ........................ N^th Iteration: result = result+ (2^n-1)*b ...........I hope It will help you!!!!!!!
gmpgiri Thank you. Solved the problem now!
vjitesh Will you tell me the Code how it solved.
rajat_chouksey07 for (int j = 0; j < n; j++) { a += b; System.out.print(a + " "); b *= 2; } System.out.println();
abhishekjohri98 Thanks for sharing, found it very simple to understand.
farkas_krisztia1 Not sure why it's been down voted. It's a brilliant solution. Helped me a lot to understand what's going on. Thanks mate
harishhp53 Out of all the complicated solutions, you gave the simplest solution ever. Brilliant thinking! Thanks for sharing.
rohit8366 I am glad my comment helped you ! Keep Coding :D
ashita_gaur [deleted]ankitkumarw12 really you make it very simple...too good
chakhil02 i didnt understand your logic can u explain it please
devendra_singh91 i mean first you have to calculate the first term then see that the first term is common in all terms so you have to just appy a loop after that , and in that loop i have told that what we have to perform. Now just simply iterate that loop and multilpy that first term to the matter that you calculated inside the loop.
officialmailsgi1 Just brilliant!!!
SinghJaspreet95 [deleted]
shivammahajan98 But by this logic it will add 'a' each loop we only have to add 'a ' first iteration only....
vinityadav int A = 5; int B = 3; int loop = 5;
int tempAnswer = A; for (int j = 0; j < loop; j++) { tempAnswer += (int) (Math.pow(2.0, j) * B); System.out.print(tempAnswer + " "); }rathoreabhi1990 It will not work. First line i.e. int tempAnswer = A; It will fail.
meet_alexmac [deleted]chaitanya492 yes, u are right,, but what is the reason behind it??
Zeeshan1996 [deleted]geo_sam_ca It should be an "a".
Mitprajapati int tempAnswer = 0; for (int j = 0; j < loop; j++) { tempAnswer += (Math.pow(2, j) * b); System.out.print(tempAnswer + a + " "); }
rajmetre92 nice
ayu_agr2011 when i write tempAnswer = tempAnswer + (Math.pow(2,j)*b); it gives an error of loss of precision. Can you please explain me why is it so?
lakshmi_bhavani1 pow() gives a double value,but you are using an integer so the precision is lost..Type cast the pow() function to integer . You will get it done.
sherzodkh [deleted]goyallovish52 what is the need of taking two seperate variables: storage and formula
sherzodkh [deleted]
16bce169 If you use "println" then every number will be printed in next line..........
public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i
int sum=0; sum += a + (pow(2,0)*b); System.out.print(sum+" "); for(int j=1;j<n;j++) { sum = sum + (b*pow(2,j)); System.out.print(sum+" "); } System.out.println(); sum=0; } in.close(); } static int pow(int a,int b) { if(b>0) { return(a*pow(a,b-1)); } else { return 1; } }
TyagiLalit VIT VIT VIT
mech_engg Lol
piyushmanglani08 it will work and it works properly dude.
LALIT4960 int tempAnswer = A; for (int j = 0; j < loop; j++) { if (j == 0) tempAnswer += a; tempAnswer += (int) (Math.pow(2.0, j) * B); System.out.print(tempAnswer + " "); } This will work as we need to add a in the first instance only
np_assignment YOur Code is aWesOmE.
pprathameshmore Your code is helpful!
Etcetra take in small case alphabets i.e. "a"
linayaseen [deleted]meet_alexmac This solution is what I considered at first too, but if you do this, you will end with a trailing space. It's better to print hte first number (a + 1 * b) and then print " " + newAnswers in your loop.
ali_shahri This one works as it should I guess:
import java.util.; import java.io.;
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i
public static void doJob(int a, int b, int n){ int result=0; result = a+result; for (int i = 0 ;i<n;i++){ result =result + (int)Math.pow(2, i)*b; System.out.print(result + " "); } System.out.println(); }}
dshekhar477 why do we need int before Math.pow
johnmlhll You are using
int result
to find a power of value of the result variable using
Math.pow()
which returns a double value as a library method. You thus need to cast it to an int in order for it to work/compile. You will get a casting error otherwise.
abhijit0502 pow() takes both of its arguments as double.
aniketsarkar26 pow() results in double
Thanmai_T That implies type casting
rangareddy171 type casting
Atomsmasher124 that int is needed for type casting or for converting double data type to int type , as we know that Math funcction is of double..
sumit_jethva36 Good solution.But inorder to run another test case make sure to add result = 0; after System.out.println(); otherwise it will take previous result value for another test case.
shreya_goel2015 why are you creating another method? Why not do the same thing in main method?
rohitsharma68381 it fails not work
muskanbansal978 According to me best solution
domaners You can use the .trim() method on your output string to remove the trailing space:
int runningTotal = a; String outputString = ""; int multiplier = 1;
for(int count = 1; count <= n; count++) { runningTotal += multiplier * b; outputString += runningTotal + " "; multiplier *= 2; }
System.out.println(outputString.trim());
kwhwj It solves the problem of a^(count-1). Thank you.
aashayoo9 import java.util.; import java.io.; import java.lang.*;
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); int x=0; int y[]=new int[15]; for(int i=0;i
in.close(); }}
s_k_r why have you subtituted (int) in the line no 3?
rishabh_hurr for converting double to int
rishabh_hurr converting from double to int becoz pow function gives the double value got it ??
gjayaraj18031998 maybe in the first line int tempAnswer = 0;
mar87 Thanks vinityadav !! it works! private static String answer(int a, int b, int n){ String answer = ""; int tempAnswer= a; for (int i = 0; i < n; i++) { tempAnswer += (int) (Math.pow(2.0, i) * b); respuesta = respuesta+ " " + tempAnswer; }
DanYoo940 what is +=??
sleepycloudtodd increment the value on the right by the value on the left( so i += j means increment j by i). :) This website seems pretty snobby condsidering the questions asked, how they are explained, and how people talk to each other in the discussions. I did a code camp and know some fairly tricky things and most of these questions seem designed for those who either have math degrees or those who already know a lot about Java and want to keep their skills sharp. "Easy"? Sure... How would a Java beginner even know there is a Math.pow method to import?
Anyway, check out codingbat.com for more straightforward questions that actually range from beginners to advanced. Also look into codecademy.com. Really great resources for FREE.
DanYoo940 dang this helps a lot. Thank you so much
Yogesh_Ganpule you made it more complex
kritikapatel111 import java.util.; import java.io.;
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i
} System.out.println(""); } in.close(); }}
rajat_chouksey07 dont use Math.pow function.
ranjiece98 tq
n140695 Thank you :)
swethareddypoth1 It's wrong bro
nahomagidew [deleted]
Liswin [deleted]mysidia I solved this.... I believe the "EASY" level classification is incorrect, Because this question requires significant extra analysis And an understanding of mathematical series to approach.
The question in the way that it's written will not be accessible to most beginning and intermediate programmers, unless you have an academic background in Applied math, discrete algebra, or Calculus.
Anyways, they're looking to provide you A list of "a", "b", "n" values, and repeat this process q times.
Each time you get a list of a, b, n values, they want you to print out the integer Sum which you get when you add up 'n series terms' from the expression.
The first series term is
a + 2^0 * b
The second series term is a + 2^0 * b + 2^1 * b
This process repeats up to "n", and the n-th series term is
a + 2^0 * b + 2^1 * b + .... + 2^(n-1) * b
Your loop just needs to show the cumulative sum on each series term
I suggest working it out on paper with the sample inputs before writing the program.
sahil00941 its easy peasy
ewhitedev Easy for someone with a degree in mathematics. Algorithms aren't "easy".
nishanthduvva [deleted]vickyvignesh384 import java.util.; import java.io.; import java.math.*;
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); int s=0; int v=0; for(int i=0;i System.out.print(v+" ");
} System.out.println(); s=0; v=0; } in.close(); }}
this code works fine
johnmlhll Me neither.. not a scooby doo on what I was been asked. Some of the contributions below shone a light on what was been asked and made it possible to solve.....
thrinath999 import java.util.; import java.io.; import static java.lang.Math.pow; class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i } in.close(); } }
xooBEE dear look at the qustion carefully.....when u focus on it u get more issues and problems but behind that once a time will came ur one confiusion converts to an answer.this remarks the sucess........take difference of its answer u will get solution
akshayakki this is what i got:
for(int i=0;i
deekshithsagar73 NOO
UserNameDhru [deleted]UserNameDhru You need to take the value of a, b and n and create a series of ans using this (a + 2^0 * b),..., (a + 2^0 * b + 2^n-1 * b)
q is just tells the number of quires you'll be performing, if q is 3 then you'll have to create 3 sereies of ans using the series that they have given you.
q = 3;
a = 0 b = 2 n = 10
a = 5 b = 3 n = 5
a = 1 b = 8 n = 3
[2, 6,..., 2046]
[8, 14,...,98]
[9, 25, 57]
n will tell you how long will series of ans will be. a = 0; b = 2 ; n = 10; (0 + 2^0 * b), [(0 + 2^0 * b) + (2^1 * b)] ... (0 + 2^0 * b + 2^1 * b + a + 2^0 * b ) Your series of ans be [2 , 6 ... ans]
The catch in the series is you only need to add the new 2^n-1 to the previous calculation you did.
import java.util.*; import java.io.*; class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i<t;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); int count = 0; int constant = 0; int sum = 0; while(count < n){ if(count == 0){ constant = 1; sum = a + (constant*b) + sum; }else{ constant = constant * 2; sum = (constant * b) + sum; } System.out.print (sum + " "); count += 1; }//end while System.out.println(); } in.close(); } }
jiaullah94 This program is working fine, but constant value =0 you defined already right? If count !=0 then, constant will become 0*2 =0 and it will continue right? can u please explain how it is working.
IdiotTester the value of constanst is 1 after first execution
shray for(int i=0;i
bikashpokhrel33 same here :D
omyoo7 Here is full code: but please first understand it before use...
import java.util.; import java.io.;
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); int temp = 0; for(int i=0;i for(int j = 1; j <= n; j++){ temp += (int)(Math.pow(2, j-1) * b); System.out.print((a + temp) + " "); } temp = 0; System.out.printf("\n"); } } }
onwuchekwalucas System.out.print((a + temp) + " ");
was really helpful
przemyslawg91 int replace = 0; for (int j = 0; j < n; j++) { int math = (int) Math.pow(2, j); int sum0 = (math * b); int ver = sum0; replace += ver; int asd = a + replace; System.out.printf("%d ", asd); } System.out.println(""); } in.close();
test71213 for each of the 'q' queries you are given three values - (a,b,n)
- Task is to print a series with 'n' space separated terms where i(th) term is of the form =>> ( a + (b * (2^i)) )
- Print such a sequence for each of the queries in new line. Thats all
mohammadaslampa1 Yah, It's a simple question to loop and print a series of the form (a+1*b)+(a+1*b+2*b)+(a+1*b+2*b+4*b)+...........
You need to append always Math.pow(2,j) times b i.e 2^1*b,2^2*b....
kaustabh_sinha97 public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i<t;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); int seq = a + (int)Math.pow(2, 0) * b; System.out.print(seq + " "); for (int j = 1; j < n; j++){ seq = seq + (int)Math.pow(2, j) * b; System.out.print(seq + " "); } System.out.println(); } in.close(); }kaustabh_sinha97 Hope it helps.
steveperkins This is an absolute joke. My code worked on the first try, but the exercise was:
5% - Demonstrating the ability to write a two-level nested "for" loop in Java.
95% - Getting your mind back into the mode of undergraduate algebra, and deciphering this ridiciously contrived number series.
For this website to have any meaningful value at all, that emphasis should really be the reverse.
cjones88 Agreed.
grumpy_riddle as you will find, programming has to do A LOT with math; but they gave to you all the tools to complete it, the key is to start thinking like a computer and do the calculations; because programming = calculations.
prt397 Agreed with you
aratan Maths is key of software developement. U must have knowledge of this.
steveperkins Number one... I've been a professional software developer for over 20 years. I assure you that number series puzzles will be irrelevant to the work that 99%+ of you will ever do.
Number two... written communication is key to a software development career. Therefore, should this site design programming exercises whose primary challenge is teaching you how to spell properly?
Of course not. The primary purpose of this exercise at this point in the series is to develop or demonstrate mastery of two-level nested loops. Extraneous material that renders this primary purpose secondary only weakens the effectiveness of this exercise.
mysidia There is math involved for sure, But real-world programming rarely or Never involves a task like the one described in the highly-contrived problem.
Anyways: A simple rule should be observed.... If you want to write a math problem, your own math and use of mathematical language should be written as a Clear, and sensical question using conventional language and notation.
Although the main contention with this problem is that the language is a bad explanation of what answers are to be provided by the solution.
The authors printed some formulae in the description but used an informal approach. They also used the word "series" incorrectly.
"print the series corresponding to the given a, b, and n values as a single line of n space-separated integers."
Since a series is by definition "An Infinite sum", "Printing a series as a sequence of integers" is nonsensical.
Frankly, at first glance, the notation used is a bit wonky. Usually you also don't use commas to separate your partial sums; You would list them on separate lines.
It's not clear from the question statement that the author is in fact even looking for the list of partial sums from 1 up to N, and that N is also the number of terms. You have to read between the lines.
Finally, After the end of the problem description and start of the Input Format, here comes an unexplained value called "q" for "Number of queries", Which seems superfluous, since the problem statement above did not mention how this is to be used.
So you're essentially left coming up with a theory on what the problem is to be solved, And testing a bunch of mathematics out on paper to see if the sample inputs and outputs agree with what you think they wanted to say they wanted.
For real-world programming: usually, when anything beyond simple arithmetic is involved in terms of math, this will be math that the programmer has constructed or processed on their own to efficiently solve a problem --- in some cases you may have a formula to evaluate With user-provided inputs, rarely you might even have an iterative process to evaluate to achieve a summary result, But in the real world they're sure as hell not going to ask you for terms of a series you are computing; not unless you're stepping through it for debugging or in a programming domain specialty is developing mathematical modeling equations, or something similar as that.
hivex201 true x)
sharmatushar124 Guys, done without creating another object please checkout
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i<t;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); for(int j = 0; j < n; j++){ a = a + (int)Math.pow(2,j)*b; System.out.print(a + " "); } System.out.println(""); } in.close(); } }
synhack That's good. You can simplify even further if you realize that 2^0 + 2^1 + ... + 2^j = 2^(j+1) - 1
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); StringBuilder sb = new StringBuilder(); for(int i=0;i<t;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); sb.setLength(0); for(int j=0; j<n; ++j) { // 2^0 + 2^1 + ... 2^j = 2^(j+1) - 1 sb.append((int) (a + b*(Math.pow(2, j+1) - 1))).append(" "); } System.out.println(sb.toString()); } in.close(); } }
Liswin What does variable 't' hold in this program?
sleepzilla23 The number of queries, which is the integer on the first line of the input.
ayushbarnawal48 then what's about n? I'm confuse in between these two. Can you please explain.
_Syarif_ 2 3 3 4 5 6 5 7 n = 8
mysidia I didn't need to call the Math.pow() function.
I used
for(x = 0; x < n; x++) { result = a; for(h = 0; h <= x; h++) result += (1<< h) * b; if ( x > 0) System.out.printf(" "); System.out.printf("%d", result); } System.out.printf("\n");
sruthi_15821 what does this line(result += (1<< h) * b) do? what is the role of << operator?
mysidia a += b; is the same as a = a + b;
(1<<h) Starts with 2 to the zeroth power, a binary 1, Shifts the number to the left by h binary bits, e.g 00000001 in binary left shift 1 becomes 00000010, left shift 2 becomes 00000100.
Left-shifting a binary number by 1 bit position multiplies that number by 2. Left-shifting by 2 multiplies by 2^2. Left-shifting by 3 multiplies by 2^3, etc.
sruthi_15821 thankyou..
niktor nice idea with the binary shift!
nagireddy030493 for(int i=0;i
sum= sum+b; System.out.print(sum+" "); b=2*b; } System.out.println(""); } in.close();
sisolta75 Should be h<=x+1
gourabinda whats that String builder means?
PaviChandren Is Math.pow() an inbuilt function in JAVA?
rowansiwakoti Yes
chauhanshreya39 what is the function of math.pow
dave_balazs math.pow(2, 3) is 2^3 (3rd power of two) and will result in 8. Basic math.
govardhan271 excellent
samyak_jain7172 Sir, It dosen't Work.The line"System.out.println("");"does not change the line for 2nd input.
chandanhtc_adit1 make sure, it is after the block.
Sunjoker I also do this,but it is wrong!Why?
akhil_singh_as70 here a = a + (int)Math.pow(2,j)*b;
why we used a= a + __ : can we use another integer like int c=0; c= a + (int)Math.pow(2,j)*b;
if not please explain
rustamraj101 why u use t integer variable here?
vinaykrishna931 Clear and Perfect...!! Thanks
chamzz Yes.This is correct. But I have one question... In the series we can see evey value is multiply by b.(either first a also).But in your code I can't see that. But your one gives correct answer. Can you please explain that for me?
I used this and this gives wrong answerI can't realize why it is wrong???
import java.util.*; import java.io.*; class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int q1=0;q1<t;q1++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); int ans=a+1*b; for(int j=0;j<n;j++){ int x=2^j*b; ans+=x; System.out.print(ans+" "); } System.out.println(); } in.close(); } }
rcardoso This line:
int ans=a+1*b;
Should be:
int ans = a;
Since you're loop from 0 you code is calculating a + 2^0*b twice and you will get a wrong result.
And this line:
int x=2^j*b;
The '^' it xor (exclusive or) operator not pow operator. You have to use
Math.pow();or a shift operation.aksha_v95 Thank You. I have used the shift operation as you said but two test cases failed out of 5. Could you please help me with this code?
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i<t;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); int first = a+b; int sec = (2*b)+first; System.out.print(first+" "+sec+" "); int sum = sec; for(int j=1;j<=n-2;j++){ int s = ((2<<j)*b); sum = sum + s; System.out.print(sum+" "); } System.out.println(" "); } in.close(); } }
Pricks_123 Thanks #sharmatushar124 for ur Soln.
jeya28798 but what i the need of 't' here
RodneyShag Java solution - passes 100% of test cases
If using Math.pow(), make sure you cast it to an integer since it returns a double.
import java.util.Scanner; class Solution{ public static void main(String [] args) { Scanner scan = new Scanner(System.in); int t = scan.nextInt(); for (int i = 0; i < t; i++) { int a = scan.nextInt(); int b = scan.nextInt(); int n = scan.nextInt(); for (int j = 0; j < n; j++) { a += b * (int) Math.pow(2, j); System.out.print(a + " "); } System.out.println(); } scan.close(); } }
From my HackerRank Java solutions.
kunnu120 Can you please explain what does this line do? a += b * (int) Math.pow(2, j);
RodneyShag a += b * (int) Math.pow(2, j);
is shorthand for
a = a + b * (int) Math.pow(2, j);
Math.pow() is a function that is provided to us by Java. Here, it takes 2 parameters. When I pass in 2 and j, it does exponentiation (known as "power") as 2 to the j-th power. For example, Math.pow(3,5) = 3 * 3 * 3 * 3 * 3.
Also, Math.pow() returns a double instead of an int. We "cast" it to an integer by putting
(int)
in front of it. We cast our result since a is an integer type and we can only assign an int type to it.
Hope this helps.
kunnu120 Thank you very much for explaining me.
kunnu120 what's wrong with this? can you please tell me
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i<t;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); for (int j = 0; j < n; j++) { int c = a + b * (int) Math.pow(2, j); System.out.print(a + " "); a = c; } System.out.println(); } in.close(); } }RodneyShag I think the values for "a" and "c" are incorrect inside the inner for loop.
lata_lingadal where the value of t is used ?what is neccesary of it in this code....
kunnu120 t is number of test cases
vikaskumar_vsk Great explanation. Thank you so much.
ParthHingorani The value of 'b x 2^j' gets added to 'a' in that expression. It is like 'a = a + (b x 2^j)'. Hope this helps.
ahmetsalttarimci Yes, only exception that code will terminate is ; first input 0 Great code @rshaghoulian
deeppandey573 System.out.print(a + " ");......whats the meaning of this line?
jaga1234reddie (answer for ur question is if consider a =10 , that line prints a blank space for the value i.e., 10) import java.util.; import java.io.;
class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt();
for(int i=0;i<t;i++){ int k =0; int r=0; int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); // System.out.println(a+" "+b+" "+n ); for (double j =0;j<n;j++){ r = r+(int)(Math.pow(2.0,j)*b); k=r+a; System.out.print(k+" "); } System.out.print("\n"); } in.close(); }}
ruchikakandpal21 I have written the same code but it's not working. Can you help
RodneyShag Sure. Try to compare your code to the code I have posted above to see what's different. Change 1 line at a time from your code to mine to see when it starts working.
wobadha [deleted]kalyankumar11311 can u explain this code
RodneyShag Hi. We want to print each term in the formula provided in the problem description. This is the code that does so:
for (int j = 0; j < n; j++) { a += b * (int) Math.pow(2, j); System.out.print(a + " "); }
Try to compare the value of a in my code above to each term in the equation in the problem statement. First, for j= 0, we will get:
a + (2^0)*b
which matches the first term in the formula in the problem statement.
Try to see what we get for j=1 and j=2.
nburose91 While I agree this works, not sure if this is what was intended from the prompt. In the last section it describes: "Once we hit n=10, we print the first ten terms as a single line of space-separated integers.", which would imply that they want you to do the entire series calculation first, then print the result.
Seems a bit weird that this is where it is in the challenge list, as I would think a recursive solution is called for in that case.
Apoorvsh Why is a System.out.println(); added in the last. If I am remove it the code is not working. please help.
Sowmeya System.out.println(); What is the use of this?
RodneyShag This was answered in the post above you by Apporvsh. It makes the next print start on the next line.
faizjaved class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int q=in.nextInt(); for(int i=0;i<q;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); for(int j=0;j<n;j++) { a+=b; System.out.print(a + " "); b*=2; } System.out.println(); } in.close(); } }
rajeshrakesh5267 for(int j=0;j
explain this logicshanibhati17 for(int i=0;i0){ res=(int)(res+Math.pow(2,j)*b); } System.out.printf("%d ",res); } System.out.printf("\n"); } } }
CloveJL pretty smart.
weichin092 class Solution{
public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i<t;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); int temp= a; for (int j = 0; j < n; j++) { if (j == 0){ temp += b; }else{ temp += (int) (Math.pow(2.0, j) * b); } if(j!=n-1){ System.out.print(temp+ " "); }else{ System.out.print(temp+" \n"); } } } in.close(); }}
RangelMX int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); for (int j=0; j<n ; j++){ for (int k=0; k<=j; k++) acum = (int) (acum + Math.pow(2, k)*b); System.out.print(a+acum+" "); acum=0; } System.out.println();
itstud87 Hello can you explain me in this case the logic of action for loop (j) and for loop (k)? Thank you.
RangelMX Excuse me, it wasn't optimal, but I corrected it.
https://www.dropbox.com/s/wsg7kacoquvopsv/Algoritmo.jpeg?dl=0
RangelMX for (int k=0; k<n; k++){ acum = (int) (acum + Math.pow(2, k)*b); System.out.print(a+acum+" "); } acum=0; System.out.println();
dhruvilshah35 It is an anwer I guess.Hope you find it good.
import java.util.*; import java.io.*; class Solution{ public static void main(String []argh){ Scanner in = new Scanner(System.in); int t=in.nextInt(); for(int i=0;i<t;i++){ int a = in.nextInt(); int b = in.nextInt(); int n = in.nextInt(); for(i=0;i<n;i++) { a=a+(int) (Math.pow(2,i)*b); System.out.print(a+" "); } System.out.println(); i=0; } in.close(); } }
15n_j If I remove the i=0 code why does the output fall short?
dhruvilshah35 for second case you must need i=0 because for case 1 i incremented to n-1. or you can change j instead of i in inner for loop.So you you dont need to write i=0
15n_j Understood! thank you for the reply
sherzodkh perfect
sahar_m_65 for (int j = 0; j < n; j++) { int result = a; for (int g = 0; g <= j; g++) { result += Math.pow(2, g) * b; } System.out.print(result + " "); } System.out.println();
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