Didn't need to do it.

for( int i = 0 ; i < n ; i++)

    {
        scanf("%d", &a[i]);
        rc += a[i];
    }
    for( int i = 0 ; i < n ; i++)
    {
        lc += a[i-1];
        rc -= a[i];
        if(lc == rc)
        {
            flag = 1;
            break;
        }

    }
    if(flag == 1)
        printf("YES\n");
    else
        printf("NO\n");
 }