Runtime error on Ideone but works fine on my computer

Question

I was writing a program for finding out Intersection of two sorted arrays in C language. The code works fine when I compile it with GCC on my machine and run it, but gives a runtime error on ideone.com.

Here is the Live link to the below code:

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

int main(){
    int arr1[] = {1,3,4,5,7,11,123};
    int arr2[] = {2,3,5,6,7,8,9,11,23,123};

    int i, j=0, k=0, l1, l2;

    l1 = sizeof(arr1)/ sizeof(arr1[0]);
    l2 = sizeof(arr2)/ sizeof(arr2[0]);

    while(j<l1 && k<l2){
        if(arr1[j]<arr2[k]){
            j++;
        }
        else if(arr1[j]>arr2[k]){
            k++;
        }
        else{
            printf("%d\t", arr1[j]);
            j++; k++;
        }
    }
}

Answer 1

I am not very sure, as your code looks good.

However, adding a return 0; at the end of main() gives a success. Maybe, a constrain with the on-line compiler itself.

^{Also, changed int main() to int main(void), but that is of no importance here.}

see LIVE CODE