Submission #1137677

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1137677	2025-01-20 09:42:24	lightentheshadow	Colors (BOI20_colors)	C++20	43 / 100	0 ms	408 KiB

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#include <bits/stdc++.h>
using namespace std;
int main() {
    long long n;
    cin >> n;
    if (n == 1 || n > 1000) {
        cout << "= " << n;
        return 0;
    }
    if (n <= 63) {
        cout << "? 1" << endl;
        int l = 2, r = n, res;
        cin >> res;
        for (int i = 2; i <= n; i++) {
            if (i % 2) cout << "? " << l++ << endl;
                else cout << "? " << r-- << endl;
            cin >> res;
            if (res == 0) {
                cout << "= " << n - i + 2;
                return 0;
            }
        }
        cout << "= " << 1;
        return 0;
    }
 
 
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• Subtask 1: 9 / 9
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33