C Programming – HackerRank Solution | Find ODD 1 |

(HackerRank) Write a Modular C Programming code to solve Find ODD 1, All elements in an array occurs even number of times, except one element. Find the element which occurs odd number of times.

-1

Invalid

9
1 2 3 1 3 4 2 2 4

2

We clearly see that all elements occurs even number of times except 2

Refer : C Programming HackerRank all solutions for Loops | Arrays | strings

CODE:

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>

int main() {
    int n;
    scanf("%d",&n);
    if(n>0)
    {
        int array[n],i,j,count;
        for(i=0;i<n;i++)
        {
            scanf("%d",&array[i]);
        }
        for(i=0;i<n;i++)
        {
            count=0;
            for(j=0;j<n;j++)
            {
                if(array[i]==array[j])
                    count++;
            }
            if(count%2!=0)
            {
                printf("%d",array[i]);
                break;
            }
        }
    }
    else{
        printf("Invalid");
    }
    return 0;
}

OUTPUT

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Input (stdin)

-1
Your Output (stdout)

Invalid
Expected Output

Invalid

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