Submission #985962

#	Time	Username	Problem	Language	Result	Execution time	Memory
985962		alextodoran	Port Facility (JOI17_port_facility)	C++17	10 / 100	785 ms	604 KiB

port_facility

/**
 _  _   __  _ _ _  _  _ _
 |a  ||t  ||o    d | |o  |
| __    _| | _ | __|  _ |
| __ |/_  | __  /__\ / _\|

**/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N_MAX = 20;

int N;
int L[N_MAX + 2], R[N_MAX + 2];

bool color[N_MAX + 2];

bool check () {
    for (int i = 1; i <= N; i++) {
        for (int j = 1; j <= N; j++) {
            if (color[i] == color[j] && L[i] < L[j] && L[j] < R[i] && R[i] < R[j]) {
                return false;
            }
        }
    }
    return true;
}

int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin >> N;
    for (int i = 1; i <= N; i++) {
        cin >> L[i] >> R[i];
    }
    int answer = 0;
    for (int mask = 0; mask < (1 << N); mask += 2) {
        for (int i = 1; i <= N; i++) {
            color[i] = ((mask >> (i - 1)) & 1);
        }
        answer += check();
    }
    answer *= 2;
    cout << answer << "\n";

    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 56
• Subtask 4: 0 / 22