Submission #890782

#	Time	Username	Problem	Language	Result	Execution time	Memory
890782		vjudge1	Jail (JOI22_jail)	C++17	5 / 100	104 ms	4924 KiB

jail

#include <bits/stdc++.h>
#define ll long long
#define str string
#define ins insert
#define ld long double
#define pb push_back
#define pf push_front
#define pof pop_front()
#define pob pop_back()
#define lb lower_bound
#define ub upper_bound
#define endl "\n"
#define fr first
#define sc second
#define mpa make_pair
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define sz size()
#define bc back()
#define ar array
#define vll vector<ll> 
using namespace std;/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;*/
template <class _T>
bool chmin(_T &x, const _T &y){
    if(x>y){
        x=y;
        return true;
    }
    return false;
}
template <class _T>
bool chmax(_T &x, const _T &y){
    bool flag=false;
    if (x<y){
        x=y;flag|=true;
    }
    return flag;
}
//#define ordered_set tree<ll, null_type,less_equal<ll>, rb_tree_tag,tree_order_statistics_node_update>
void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
void start(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
const ll inf=2e18+7;
const ll mod=1e9+7;
const ll N=1e5+7;
const ld eps=1e-9;
void solve(){
	ll i,q;
	ll n;
	ll a,b;
	cin>>n;
	bool bamboo=true;
	for(i=1;i<n;i++){
		cin>>a>>b;
		if(a+1!=b)bamboo=false;
	}
	if(bamboo){
		cin>>q;
		ll l=0;
		vector<pair<ll,ll>> v;
		for(i=0;i<q;i++){
			cin>>a>>b;
			v.pb({a,b});
		}
		sort(all(v));
		for(i=0;i<q;i++){
			a=v[i].fr,b=v[i].sc;
			if(b<=l){
				cout<<"No"<<endl;
				return;
			}
			l=max(l,b);
		}
		cout<<"Yes"<<endl;
		return;
	}
}
signed main(){
	//start();
    ll t=1;
	cin>>t;
    while(t--) solve();
    return 0;
}
/*
1
6
5 4 3 2 1 0





*/

Compilation message (stderr)

jail.cpp: In function 'void fre(std::string)':
jail.cpp:43:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jail.cpp:43:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 16
• Subtask 4: 0 / 28
• Subtask 5: 0 / 12
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23