func_code_string: #include <bits/stdc++.h>   char a[200005], b[200005];   int cmp(char *p, char *q, int n) {     if (!strncmp(p, q, n)) return 1;     if (n % 2) return 0;     int temp = n / 2;     if (cmp(p, q, temp) && cmp(p + temp, q + temp, temp))       return 1;     else if (cmp(p + temp, q, temp) && cmp(p, q + temp, temp))       return 1;     return 0;   }   int main() {     while (~scanf( %s%s , a, b)) {       if (cmp(a, b, strlen(a)))         printf( YES n );       else         printf( NO n );     }     return 0;   }   