func_code_string: #include <bits/stdc++.h>   using namespace std;   const double PI = acos(-1.0);   const double eps = 1e-8;   char ans[1024];   int K, X, N, M;   char st[64], ed[64];   long long num[64];   void printAns(char from, char to, int all, int len) {     int pos = 1;     if (from ==  A ) pos = 0;     for (int i = 0; i < len; i++) ans[i] =  B ;     for (int i = 0; i < all; i++)       ans[pos + 2 * i] =  A , ans[pos + 2 * i + 1] =  C ;     ans[0] = from;     ans[len - 1] = to;     ans[len] =   0 ;     printf( %s n , ans);   }   int main() {     scanf( %d%d%d%d , &K, &X, &N, &M);     for (char s1 =  A ; s1 <=  C ; s1++) {       for (char e1 =  A ; e1 <=  C ; e1++) {         if (N == 1 && s1 != e1) continue;         for (char s2 =  A ; s2 <=  C ; s2++) {           for (char e2 =  A ; e2 <=  C ; e2++) {             if (M == 1 && s2 != e2) continue;             long long tn = N - (s1 !=  A ) - (e1 !=  C );             long long tm = M - (s2 !=  A ) - (e2 !=  C );             long long inN = tn / 2;             long long inM = tm / 2;             st[1] = s1, ed[1] = e1;             st[2] = s2, ed[2] = e2;             for (long long i = 0; i <= inN; i++) {               for (long long k = 0; k <= inM; k++) {                 if (N == 2 && s1 ==  A  && e1 ==  C  && i == 0) continue;                 if (M == 2 && s2 ==  A  && e2 ==  C  && k == 0) continue;                 num[1] = i;                 num[2] = k;                 for (int g = 3; g <= K; g++) {                   st[g] = st[g - 2], ed[g] = ed[g - 1];                   num[g] = num[g - 1] + num[g - 2] +                            (ed[g - 2] ==  A  && st[g - 1] ==  C );                 }                 if (num[K] == X) {                   printAns(s1, e1, i, N);                   printAns(s2, e2, k, M);                   return 0;                 }               }             }           }         }       }     }     printf( Happy new year! n );     return 0;   }   