func_code_string: #include <bits/stdc++.h>   using namespace std;   char buffer[10];   bool query(int x, int y) {     cout << x <<     << y << endl;     cout.flush();     cin >> buffer;     return (buffer[0] ==  w );   }   const int Y = 100;   bool get(int x) { return query(x, Y); }   void answer(int l, int r) {     cout << l <<     << (Y - 1) <<    ;     cout << r <<     << (Y + 1) <<   n ;   }   int main() {     int n;     cin >> n;     const bool init = get(0);     int l = 0, r = 1000 * 1000 * 1000;     for (int i = 1; i < n; i++) {       int m = (r - l) / 2 + l;       if (get(m) == init) {         l = m;       } else {         r = m;       }     }     answer(l, r);     return 0;   }   