Submission #1071397

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071397		thinknoexit	Arranging Tickets (JOI17_arranging_tickets)	C++17	10 / 100	202 ms	600 KiB

arranging_tickets

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int l[22], r[22], c[22], l1[22], r1[22];
int qs[22];
int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, m;
    cin >> n >> m;
    for (int i = 0;i < m;i++) {
        cin >> l[i] >> r[i] >> c[i];
        if (l[i] > r[i]) {
            swap(l[i], r[i]);
        }
    }
    int ans = n;
    for (int i = 0;i < (1 << m);i++) {
        int mx = 0;
        memset(qs, 0, sizeof qs);
        for (int j = 0;j < m;j++) {
            l1[j] = l[j], r1[j] = r[j];
            if (i & (1 << j)) {
                swap(l1[j], r1[j]);
            }
        }
        for (int j = 0;j < m;j++) {
            if (l1[j] > r1[j]) {
                qs[l1[j]]++;
                qs[1]++;
                qs[r1[j]]--;
            }
            else {
                qs[l1[j]]++;
                qs[r1[j]]--;
            }
        }
        for (int i = 1;i <= n;i++) {
            qs[i] += qs[i - 1];
            mx = max(mx, qs[i]);
        }
        ans = min(ans, mx);
    }
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 35
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 15