Submission #1276611

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276611		glupan	Colors (BOI20_colors)	C++20	0 / 100	1 ms	332 KiB

Colors

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int MOD = 1e9 + 7;
const int INF = 1e9;
const int MAX_N = 1e5 + 5;

void solve() { 
    int n; cin >> n;
    cout << "? 1" << endl;
    int tmp; cin >> tmp;
    int l=n,r=2;
    for(int i=1; i<n; i++) {
        if(i%2) {
            cout << "? " << l << endl;
            int ans; cin >> ans;
            l--;
            if(!ans) {
                cout << "= " << l-(r-3) << endl;
                return;
            }
        } else {
            cout << "? " << r << endl;
            int ans; cin >> ans;
            r++;
            if(!ans) {
                cout << "= " << l-(r-3) << endl;
                return;
            }
        }
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);

    int tc=1;
    while(tc--)
        solve();
} 

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