func_code_string: #include <bits/stdc++.h>   using namespace std;   char ans[1000005], tmp[1000005];   int wa;   int n, x;   void go(int x, int y) {     int len = 0;     while (x != y) {       if (x < y) {         y -= x;         tmp[len++] =  B ;       } else {         x -= y;         tmp[len++] =  T ;       }       if (len >= n) return;     }     tmp[len++] =  T ;     int w = 0;     if (x > 1 || len != n) return;     for (int i = 0; i + 1 < len; i++)       if (tmp[i] == tmp[i + 1]) w++;     if (wa > w) {       wa = w;       for (int i = 0; i < n; i++) ans[i] = tmp[i];     }   }   int main() {     while (scanf( %d%d , &n, &x) == 2) {       wa = 10000000;       for (int i = 1; i <= x; i++) {         go(i, x);         go(x, i);       }       if (wa == 10000000)         puts( IMPOSSIBLE );       else {         reverse(ans, ans + n);         printf( %d n , wa);         for (int i = 0; i < n; i++) putchar(ans[i]);         puts(  );       }     }     return 0;   }   