oj.uz

Submission #890937

# Submission time Handle Problem Language Result Execution time Memory
890937 2023-12-22T05:23:03 Z vjudge1 Jail (JOI22_jail) C++17
0 / 100
 1 ms 348 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#define int long long
#define pb push_back
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define ordered_set tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update>
#define ordered_multiset tree<type1, null_type, less_equal<type1>, rb_tree_tag, tree_order_statistics_node_update>;

using namespace std;
using namespace __gnu_pbds;

const int mod = 1e9+7;
const double PI = acos(-1.0);
const double epsilon = 1e-6;
const int N = 1.2e5+5;

void solve(){
	int n; cin >> n;
	for(int i = 1; i < n; i++){
		int u,v; cin >> u >> v;
	}
	int m; cin >> m;
	map<int,int> mp;
	for(int i = 0; i < m; i++){
		int l,r; cin >> l >> r;
		if(r < l) swap(l,r);
		mp[r] = l;
	}
	int last = 1e18;
	for(auto it = mp.rbegin(); it != mp.rend(); ++it){  // iterate in reverse order
		int r = it->first;
		int l = it->second;
		if(l > last){
			cout << "No\n";
			return;
		} else {
			last = min(last,l);
		}
	}
	cout << "Yes\n";
}

main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int tt = 1;
    cin >> tt;
    while (tt--) {
        solve();
    }
}

Compilation message

jail.cpp: In function 'void solve()':
jail.cpp:36:7: warning: unused variable 'r' [-Wunused-variable]
   36 |   int r = it->first;
      |       ^
jail.cpp: At global scope:
jail.cpp:48:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   48 | main(){
      | ^~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -