Submission #1119713

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119713		wellthen_	Exhibition (JOI19_ho_t2)	C++17	100 / 100	113 ms	4912 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n, m;
    cin >> n >> m;
    vector<pair<int, int>> pictures(n);
    for(int i = 0; i<n; i++){
        cin >> pictures[i].first >> pictures[i].second;
        swap(pictures[i].first, pictures[i].second);
    } 
    sort(pictures.begin(), pictures.end(), greater<pair<int, int>>());
    vector<int> vals(n);
    for(int i = 0; i < n; i++) {
        vals[i] = pictures[i].second;
    }
    vector<int> frames(m);
    for(int i = 0; i<m; i++){
        cin >> frames[i];
    }
    sort(frames.begin(), frames.end(), greater<int>());
    int ans = 0, ptr = 0;
    for(int i = 0; i<m; i++){
        while(ptr<n && vals[ptr] > frames[i]){
            ptr++;
        }
        ptr++;
        if(ptr > n) break;
        ans++;
    }
    cout << ans << endl;
}

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