제출 #858304

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
858304		willychan	Jail (JOI22_jail)	C++14	0 / 100	1 ms	456 KiB

jail

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
//#include<bits/extc++.h>
//__gnu_pbds

void solve(){
		int n;cin>>n;
		for(int i=0;i<n-1;i++){
			int a,b;cin>>a>>b;
		}
		vector<pair<int,int> > arr;
		int m;cin>>m;
		for(int i=0;i<m;i++){
			int s,t;cin>>s>>t;
			arr.push_back({s,t});
		}
		sort(arr.begin(),arr.end());
		for(int i=1;i<m;i++){
			if(arr[i].second<arr[i].first){
				cout<<"No\n";
				return;
			}
		}
		cout<<"Yes\n";
		return ;

}


int main(){
	ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int q;cin>>q;
	while(q--){
		solve();
	}

	return 0;
}

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