Submission #880920

#	Time	Username	Problem	Language	Result	Execution time	Memory
880920		epicci23	Mađioničar (COI22_madionicar)	C++17	38 / 100	1002 ms	596 KiB

Main

#include "bits/stdc++.h"
using namespace std;
#define int long long
#define pb push_back
#define all(x) ((x).begin(),(x).end())
#define sz(x) ((int)(x).size())


bool ask(int l,int r){
  cout << "? " << l << " " << r << endl;
  bool ans; cin >> ans;
  return ans;
}

void solve(){
  int n;
  cin >> n;
  
  int ans=1,p=1;
  for(int i=2;i<=n;i++){
  	if(p>1 && ask(p-1,i)){
  	  p--;
  	  ans=max(ans,i-p+1);
  	  continue;
  	}
    while(p<i && !ask(p,i)) p++;
    ans=max(ans,i-p+1);
  }


  cout << "! " << ans << endl;
}

int32_t main(){
  ios::sync_with_stdio(0);cin.tie(0);
  int t=1;//cin >> t;
  while(t--) solve();
}

• Subtask 1: 13 / 13
• Subtask 2: 25 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 37