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Yes in JS it is a breeze to solve. These problems are really concerning those low level languages, like C, where even doing the most simple thing requires skills :)
Reduce just takes a list of values and applies the lambda function to them to get one value at the end. Look up "reduce" in the python docs, or pretty much any website has a good explanation.
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
class Solution {
static long aVeryBigSum(int n, long[] ar) {
// Complete this function
Int64 total = 0;
for(int i=0; i < n; i++)
{
total +=ar[i];
}
return total;
}
static void Main(String[] args) {
int n = Convert.ToInt32(Console.ReadLine());
string[] ar_temp = Console.ReadLine().Split(' ');
long[] ar = Array.ConvertAll(ar_temp,Int64.Parse);
long result = aVeryBigSum(n, ar);
Console.WriteLine(result);
}
For the test cases privided it does, but what if the integers are incredibly long? JS can't handle integers with more than 15 characters, and returns approximations. You need to import a library like big-num or write a very complicated workaround to deal with large integers.
A Very Big Sum
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JS has a pretty one liner for this.
I had a very similiar answer.
console.log(arr.reduce((prev, curr) => prev + curr));This is awesome. Can you hint me where I can read more about operator
=>? Googling is not helpfulIt's part of the ES6 standard you can check out some documentation and examples here MDN LINK
Same in C# LINQ: var sum = arr.Sum(a => (long) a);
You can cut this down evern further, simply
Yes in JS it is a breeze to solve. These problems are really concerning those low level languages, like C, where even doing the most simple thing requires skills :)
Can be done in python as well
could you explain what this line is doing please? Thanks
Reduce just takes a list of values and applies the lambda function to them to get one value at the end. Look up "reduce" in the python docs, or pretty much any website has a good explanation.
Why not just use?
at python3, you net add import as follow: from functools import reduce
print sum(ar)
That's neither a one-liner nor a correct solution.
Solve in C#
using System; using System.Collections.Generic; using System.IO; using System.Linq; class Solution {
}
Thanks for the solution..Keep it up.
The exact same approach, I believe under the hood, for the aVeryBigSum function. Taking advantage of that
System.Linqnamespace.You are right. Better to use the "stint" library
For the test cases privided it does, but what if the integers are incredibly long? JS can't handle integers with more than 15 characters, and returns approximations. You need to import a library like big-num or write a very complicated workaround to deal with large integers.