Submission #1005713

#	Time	Username	Problem	Language	Result	Execution time	Memory
1005713		SuPythony	Mađioničar (COI22_madionicar)	C++17	0 / 100	1109 ms	416 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
    int n; cin>>n;
    int ans=1;
    for (int i=1; i<n; i++) {
        cout<<"? "<<i<<" "<<i+1<<endl;
        cout.flush();
        int a; cin>>a;
        if (a) {
            ans=max(ans,2);
            int l=i,r=i+1;
            while (true) {
                l--; r++;
                if (l<1||r>n) break;
                cout<<"? "<<l<<" "<<r<<endl;
                cout.flush();
                cin>>a;
                if (a) {
                    ans=max(ans,r-l+1);
                } else break;
            }
        }
    }
    for (int i=1; i<n-1; i++) {
        cout<<"? "<<i<<" "<<i+2<<endl;
        cout.flush();
        int a; cin>>a;
        if (a) {
            ans=max(ans,3);
            int l=i,r=i+2;
            while (true) {
                l--; r++;
                if (l<1||r>n) break;
                cout<<"? "<<l<<" "<<r<<endl;
                cout.flush();
                cin>>a;
                if (a) {
                    ans=max(ans,r-l+1);
                } else break;
            }
        }
    }
    cout<<"! "<<ans<<endl;
    cout.flush();
    return 0;
}

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