func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, k;   bool ask(int x, int y) {     if (x < 0 || y > n) return 0;     string s;     cout << 1 <<     << x <<     << y << endl;     cin >> s;     return s ==  TAK ;   }   int solve(int l, int r) {     if (l > r) return -1;     int mid;     while (l < r) {       mid = (l + r) >> 1;       if (ask(mid, mid + 1))         r = mid;       else         l = mid + 1;     }     return l;   }   int main() {     int i, j;     cin >> n >> k;     int ans1 = solve(1, n);     int ans2 = solve(1, ans1 - 1);     if (!ask(ans2, ans1)) ans2 = solve(ans1 + 1, n);     cout << 2 <<     << ans1 <<     << ans2 << endl;     return 0;   }   