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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int ask(int l,int r){
  5.     cout << "AK " << l << " " << r << "\n" << flush;
  6.     string s;
  7.     if(!(cin >> s)) exit(0);
  8.     return s == "O";
  9. }
  10.  
  11. int main(){
  12.     ios::sync_with_stdio(false);
  13.     cin.tie(nullptr);
  14.     int T;
  15.     if(!(cin >> T)) return 0;
  16.     while(T--){
  17.         int N;
  18.         if(!(cin >> N)) return 0;
  19.         int lo=1, hi=N;
  20.         while(lo<hi){
  21.             int mid=(lo+hi)/2;
  22.             if(ask(1,mid)) hi=mid;
  23.             else lo=mid+1;
  24.         }
  25.         int a=lo;
  26.         lo=1; hi=N;
  27.         while(lo<hi){
  28.             int mid=(lo+hi+1)/2;
  29.             if(ask(1,mid)) lo=mid;
  30.             else hi=mid-1;
  31.         }
  32.         int last = lo;
  33.         int b = last + 1;
  34.         cout << "! " << a << " " << b << "\n" << flush;
  35.     }
  36.     return 0;
  37. }
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin
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1
10

X

O

X

X

O

X
stdout
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AK 1 5
AK 1 8
AK 1 7
AK 1 6
AK 1 3
AK 1 4
! 8 4
https://ideone.com/2NnXRG
language:
C++ (gcc 8.3)
created:
16 days ago
visibility:
public

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