Submission #826806

#	Time	Username	Problem	Language	Result	Execution time	Memory
826806		t6twotwo	Festivals in JOI Kingdom 2 (JOI23_festival2)	C++17	5 / 100	9102 ms	324 KiB

festival2

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N, P;
    cin >> N >> P;
    vector<int> a(2 * N);
    iota(a.begin(), a.end(), 1);
    int ans = 0;
    do {
        bool ok = 1;
        for (int i = 0; i < N; i++) {
            if (a[i] > a[N + i]) {
                ok = 0;
            }
            if (i && a[i - 1] > a[i]) {
                ok = 0;
            }
        }
        if (!ok) {
            continue;
        }
        int s = 0, f = 0;
        for (int i = 0; i < N; i++) {
            if (a[i] > f) {
                s++;
                f = max(f, a[i + N]);
            }
        }
        int t = 0; f = 0;
        vector<int> ord(N);
        iota(ord.begin(), ord.end(), 0);
        sort(ord.begin(), ord.end(), [&](int i, int j) {
            return a[N + i] < a[N + j];
        });
        for (int i = 0; i < N; i++) {
            if (i == 0 || a[ord[i]] > f) {
                t++;
                f = a[N + ord[i]];
            }
        }
        if (s < t) {
            ans++;
        }
    } while (next_permutation(a.begin(), a.end()));
    cout << ans << "\n";
    return 6/22;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 27
• Subtask 4: 0 / 14
• Subtask 5: 0 / 36
• Subtask 6: 0 / 13