Submission #392277

#	Time	Username	Problem	Language	Result	Execution time	Memory
392277		wildturtle	Exhibition (JOI19_ho_t2)	C++14	100 / 100	154 ms	5620 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
#define ll long long
#define f first
#define sc second
using namespace std;
ll a,b,c,d,i,e,f,g,n,m,k,l,idx,B[500005],le,ri,mid,ans;
pair <ll , ll> A[500005];
bool go(ll x) {
    //cout<<x<<" ";
    idx=m-x+1;
    for(ll i=1;i<=n;i++) {
        if(A[i].sc<=B[idx]) idx++;
        if(idx==m+1) return 1;
    }
    return 0;
}
int main() {
    cin>>n>>m;
    for(ll i=1;i<=n;i++) {
        cin>>A[i].sc>>A[i].f;
    }
    for(ll i=1;i<=m;i++) {
        cin>>B[i];
    }
    sort(A+1,A+1+n);
    sort(B+1,B+1+m);
    le=1; ri=min(n,m);
    while(le<=ri) {
        mid=(le+ri)/2;
        if(go(mid)==1) { le=mid+1; ans=mid; }
        else ri=mid-1;
    }
    cout<<ans;
}	

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