Submission #1159930

#	Time	Username	Problem	Language	Result	Execution time	Memory
1159930		fatman87878	Exhibition (JOI19_ho_t2)	C++20	100 / 100	33 ms	1608 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
using namespace std;
#define ll long long 
#define all(x) (x).begin(),(x).end()
#define lb(x) ((x)&-(x))
#define IOS cin.tie(nullptr)->sync_with_stdio(0);

constexpr int maxN = 1e5+5;

int n,m,h[maxN];

pair<int,int> val[maxN];

int main(){
    IOS
    cin>>n>>m;
    for(int i = 0;i<n;i++)cin>>val[i].second>>val[i].first;
    for(int i = 0;i<m;i++)cin>>h[i];
    sort(val,val+n);
    sort(h,h+m);
    int ans = 0;
    for(int i = m,ptr = n-1;i--;ptr--){
        for(;ptr>=0&&val[ptr].second>h[i];ptr--);
        if(ptr==-1)break;
        ans++;
    }
    cout<<ans<<'\n';
}

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