Submission #417024

#	Time	Username	Problem	Language	Result	Execution time	Memory
417024		aryan12	Colors (BOI20_colors)	C++17	0 / 100	1 ms	200 KiB

Colors

#include <bits/stdc++.h>
using namespace std;
#define int long long

void Solve() {
    int n;
    cin >> n;
    int l = 1, r = n, cnt = 0, ans = n;
    while(l <= r) {
        int response;
        if(cnt % 2 == 0) {
            cout << "? " << l++ << endl;
        }
        else {
            cout << "? " << r-- << endl;
        }
        cnt++;
        cin >> response;
        if(cnt == 1)
            continue;
        if(response == 1) {
            ans = min(ans, r - l + 2);
        }
        else {
            cout << "! " << ans << endl;
            break;
        }
    }
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    Solve();
    return 0;
}

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