Submission #873327

#	Time	Username	Problem	Language	Result	Execution time	Memory
873327		PagodePaiva	Colors (BOI20_colors)	C++17	0 / 100	0 ms	344 KiB

Colors

#include<bits/stdc++.h>

using namespace std;

bool query(int x){
 int p;
    cout << "? " << 1 << '\n';
    cout << flush;
    cin >> p;

    cout << "? " << x+1 << '\n';
    cout << flush;
    int t;
    cin >> t;

    if(t == 1) return true;
    return false;
}

int main(){
    int n;
    cin >> n;

    int l = 1, r = n;

    while(l < r){
        if(r == l+1){
            if(query(l)){
                r = l;
            }
            else{
                l = r;
            }
            break;
        }
        int mid = (l+r)/2;

        if(query(mid)){
            r = mid;
        }
        else{
            l = mid+1;
        }
    }

    cout << "= " << l << '\n';

}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33