Submission #988923

#	Time	Username	Problem	Language	Result	Execution time	Memory
988923		carriewang	Exhibition (JOI19_ho_t2)	C++17	100 / 100	41 ms	5728 KiB

joi2019_ho_t2

//#pragma GCC optimize("O3,Ofast,unroll-loops,no-stack-protector")
//#pragma GCC target("avx2")

#include <bits/stdc++.h>
#include <bits/extc++.h>
#define int long long
#define double long double
using namespace std;
using namespace __gnu_pbds;

using vi=vector<int>;
using vvi=vector<vi>;
using pii=pair<int,int>;

#define sz(x) x.size()
#define all(x) x.begin(),x.end()
#define eb emplace_back
#define mp make_pair
#define UNTIEIO ios::sync_with_stdio(0),cin.tie(0);

int n,m;

signed main(){
    UNTIEIO;
    cin >> n >> m;
    vi c(m);
    vector<pii> p(n);
    for(int i=0;i<n;i++) cin >> p[i].second >> p[i].first;
    for(int i=0;i<m;i++) cin >> c[i];
    sort(all(p));
    sort(all(c));
    int now=n-1,ans=0;
    for(int i=m-1;i>=0;i--){
        while(now>=0 && p[now].second>c[i]) now--;
        if(now>=0){
            ans++;
            now--;
        }
    }
    cout << ans << "\n";
}

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