제출 #391890

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
391890		lukameladze	Exhibition (JOI19_ho_t2)	C++14	0 / 100	1 ms	204 KiB

joi2019_ho_t2

# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
using namespace std;
const int N=3e5+5;
long long ff,b[N],ri,le,mid,n,m,ans;
pair <long long , long long> a[N];
int check (int mid) {
     int ri=m;
     for (int i=mid; i>=1; i--) {
          ff=0;
         while (ri>0) {
              if (b[ri]>=a[i].s) {
          //         cout<<b[ri]<<" "<<a[i].s<<endl;
                   ri--;
                   ff=1;
                   break;
              }
              ri--;
         } 
         if (!ff) break;
     }
     if (!ff) return 0;
     else return 1;
}
int main() {
     cin>>n>>m;
     for (int i=1; i<=n; i++) {
          cin>>a[i].s>>a[i].f;
     }
     sort(a+1, a+n+1);
     for (int i=1; i<=m; i++) {
          cin>>b[i];
     }
     sort(b+1, b+m+1);
     le=1;
     ri=n;
     while (le<=ri) {
          int mid=(le+ri)/2;
        //  cout<<mid<<" "<<le<<" "<<ri<<endl;
          if (check(mid)) {
               le=mid+1;
               ans=mid;
          } else {
               ri=mid-1;
          }
     }
     cout<<ans<<endl;
}

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