Submission #1192000

#	Time	Username	Problem	Language	Result	Execution time	Memory
1192000		hmmm	Carnival (CEOI14_carnival)	C++20	0 / 100	6 ms	432 KiB

carnival

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

const int N = 155;
int a[N];

int F(int l, int r) {
    int x;
    cout << r - l + 1;
    for (int i = l; i <= r; i++) cout << ' ' << i;
    cout << '\n' << flush; // flush สำคัญมาก
    cin >> x;
    return x;
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int n, cnt = 1;
    cin >> n;

    a[1] = 1;

    for (int i = 2; i <= n; i++) {
        int x = F(1, i);
        if (x != cnt) {
            a[i] = ++cnt;
        } else {
            int l = 1, r = i - 1, pos = -1;
            while (l <= r) {
                int mid = (l + r) / 2;
                int t1 = F(mid, i);
                int t2 = F(mid, i - 1);
                if (t1 == t2) {
                    l = mid + 1;
                } else {
                    pos = mid;
                    r = mid - 1;
                }
            }
            a[i] = a[pos];
        }
    }
    cout << "0";
    for (int i = 1; i <= n; i++) {
        if (a[i] == 0) a[i] = 1;
        cout << ' ' << a[i];
    }
    cout << '\n' << flush;

    return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20