Submission #1124951

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124951		imarn	Exhibition (JOI19_ho_t2)	C++20	0 / 100	2 ms	2632 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC target("avx2")
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define plx pair<ll,int>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vvi vector<vi>
#define pp pair<ll,int>
#define ub(x,i) upper_bound(all(x),i)-x.begin()
using namespace std;
const int mxn=1e5+5;
vector<int>g[mxn];
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n,m;cin>>n>>m;
    pii a[n];int c[n];
    for(int i=0;i<n;i++)cin>>a[i].f>>a[i].s;
    for(int i=0;i<m;i++)cin>>c[i];
    sort(a,a+n);sort(c,c+m);
    vector<int>vec;vec.pb(a[0].s);
    g[1].pb(0);
    for(int i=1;i<n;i++){
        int id=upper_bound(all(vec),a[i].s)-vec.begin();
        if(id==vec.size()){
            vec.pb(a[i].s);
        }else vec[id]=a[i].s;
        g[id+1].pb(i);
    }
    int l=0,r=m;
    while(l<r){
        int md=(l+r+1)>>1;
        int cur=m-1;
        int mx=2e9;
        bool ok=1;
        for(int i=md;i>=1;i--){
            int mem=-1;
            for(auto it : g[i]){
                if(c[cur]>=a[it].f&&a[it].s<=mx)mem=max(a[it].s,mem);
            }
            if(mem==-1){ok=0;break;}
            cur--;
            mx=mem;
        }
        if(ok)l=md;
        else r=md-1;
    }cout<<l;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50