oj.uz

Submission #890820

# Submission time Handle Problem Language Result Execution time Memory
890820 2023-12-22T03:50:36 Z vjudge1 Jail (JOI22_jail) C++17
0 / 100
 6 ms 3164 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int N = 120000;

vector<int> g[N+1];
int n;

/*
struct Fenwick{
	vector<int> fenw;
	int n;
	
	Fenwick(int sz){
		n = sz;
		fenw.resize(n+5, 0);
	};
	
	void add(int i, int x){
		for(; i <= n; i+= i & -i){
			fenw[i]+= x;
		}
	}
	int pref(int i){
		int s = 0;
		for(; i > 0; i-= i & -i){
			s+= fenw[i];
		}
		return s;
	}
	int sum(int l, int r){
		return pref(r) - pref(l-1);
	}
	
};

*/
void cl(){
	for(int i = 1;i <= n; i++) g[i].clear();
}






void solve(){
	 cin >> n;
	
	for(int i = 1;i < n; i++){
		int a, b; cin >> a >> b;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	int q; cin >> q;
	vector< pair<int, int> > query(q);
	vector<array<int, 4> > p;
	for(int i = 0;i < q; i++){
		cin >> query[i].ff >> query[i].ss;
		if(query[i].ff > query[i].ss) swap(query[i].ff, query[i].ss);
		p.push_back({query[i].ff, query[i].ss, 0, i});
		p.push_back({query[i].ss, query[i].ff, 1, i});
	}
	sort(all(p), [&](auto A, auto B){
		if(A[0] == B[0]){
			if(A[1] == B[1]) return A[2] < B[2];
			return A[1] > B[1];
		}
		return A[0] < B[0];
	});
	
	multiset<int> st;
	for(auto [x, y, op, idx] : p){
		if(!op){
			
			if(st.empty() == false && *st.rbegin() >= query[idx].ss){
				cout << "No";
				return;
			}
			st.insert(query[idx].ss);
		}else{
			st.erase(st.find(x));
		}
	}
	
	cout << "Yes";
}


signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int t; cin >> t;
	while(t--){
		solve();
		cl();
		cout << '\n';
	}
	
	return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3164 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Correct 1 ms 3164 KB Output is correct
4 Incorrect 6 ms 3164 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3164 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Incorrect 1 ms 3164 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3164 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Incorrect 1 ms 3164 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3164 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Incorrect 1 ms 3164 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3164 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Incorrect 1 ms 3164 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3164 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Correct 1 ms 3164 KB Output is correct
4 Correct 1 ms 3160 KB Output is correct
5 Incorrect 4 ms 3164 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3164 KB Output is correct
2 Correct 1 ms 3164 KB Output is correct
3 Correct 1 ms 3164 KB Output is correct
4 Incorrect 6 ms 3164 KB Output isn't correct
5 Halted 0 ms 0 KB -