Consider following C program:

#include < stdio.h >

int main()
{
    int x[] = {2, 4, 6, 8, 10};
    int a, b = 0, *y = x + 4;

    for(a = 0; a < 5; a++) 
    { 
        b = b + (*y - a) - *(y - a);
    }

    printf("%d\n", b);
    return 0;
}

What will be the output of the above C program?