Submission #209878

#	Time	Username	Problem	Language	Result	Execution time	Memory
209878		sevlll	Exhibition (JOI19_ho_t2)	C++14	100 / 100	75 ms	5664 KiB

joi2019_ho_t2

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define pb push_back
#define ld long double

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n, m;
    cin >> n >> m;
    vector<pair<int, int>> K(n);
    for (int i = 0; i < n; i++) cin >> K[i].second >> K[i].first;
    vector<int> R(m);
    for (int i = 0; i < m; i++) cin >> R[i];
    int l = -1, r = min(n, m);
    sort(K.begin(), K.end());
    sort(R.begin(), R.end());
    while (r - l > 1) {
        int mid = (l + r) / 2;
        int uk = m - mid - 1;
        bool f = false;
        for (auto p : K) {
            if (p.second <= R[uk]) {
                uk++;
                if (uk == m) {
                    f = true;
                    break;
                }
            }
        }
        if (f) {
            l = mid;
        } else {
            r = mid;
        }
    }
    cout << l + 1;
}

• Subtask 1: 10 / 10
• Subtask 2: 40 / 40
• Subtask 3: 50 / 50