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  1. Prepare
  2. Algorithms
  3. Debugging
  4. XOR Strings
  5. Discussions

XOR Strings

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94 Discussions

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  • rezl_jaws
     + 0 comments

    You will have to read through the questions thoroughly, which clearly states 3 lines mods... Here are my C++ changes to fix the issue

    for (int i = 0; i < s.size(); i++)
{
  if ((s[i] == t[i]) && ((s[i] == '0') || (s[i] == '1'))) //1st change
     res += '0';   //2nd change
    else
      res += '1';   //3rd change
}

  • abe149
     + 0 comments

    something does seem to be wrong with the "grader" for both supported C++ versions. Take a look at the results, after I made the [3 quick-and-simple] fixes…

    Compiler Message

    Wrong Answer

    Input (stdin)

    10101

00101

    Your Output (stdout)

    10000

    Expected Output

    10000

  • phanmainhatlong
     + 0 comments

    Many languages where there is no code should be hidden... if that a thing. And something's wrong with C++ grader?

  • reunan1_beauvoi1
     + 0 comments

    The C code is almost blank, just the main function and not the strings_xor function. So i had to create the code by myself so of course it doesn't work since the main condition isn't satisfied (just 3 lines)...

    C implementation : 

    #include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

char * strings_xor(char * input1, char * input2)
{
    char * answer = malloc(strlen(input1) * sizeof(char));
    
    for (int i = 0; i < strlen(answer); ++i)
    {
        answer[i] = '0';
    }
    
    // We read the console
    
    scanf("%s\n",input1);
    scanf("%s\n",input2);
    
    // We calculate the XOR relation between the inputs
    
    for (int i = 0; i < strlen(input1); ++i)
    {
        if (input1[i] != input2[i])
        {
            answer[i] = '1';
        }
        if (input1[i] == input2[i])
        {
            answer[i] = '0';
        }
    }
    
    return answer;
}

int main()
{
    // We create three pow(10,4)+1 length string variables to stock the inputs and to create the answer
    
    char * input1 = malloc((pow(10,4)+1) * sizeof(char));
    char * input2 = malloc((pow(10,4)+1) * sizeof(char));
    
    char * answer = strings_xor(input1,input2);
    
    // We display the answer
    
    printf("%s",answer);
    
    free(input1);
    free(input2);
    free(answer);
	`
    
    return 0;
}

  • alexander_laptin
     + 1 comment

    C# implementation:

    static string strings_xor(string s, string t)
{
    string result = "";

    for(int i = 0; i < s.Length; i++)
    {

        result += s[i] == t[i] ? '0' : '1';
    }

    return result;
}

    Compiler is saying "Wrong Answer".