oj.uz

Submission #858637

# Submission time Handle Problem Language Result Execution time Memory
858637 2023-10-09T03:31:46 Z iskhakkutbilim Joker (BOI20_joker) C++17
0 / 100
 2000 ms 17364 KB 
#include <bits/stdc++.h>
using namespace std;

#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int N = 2e5;
vector<pair<int, int> > g[N+1];
int n, m, q, timer = 1; 
int used[N+1];
int l, r, ok = 0; 
void dfs(int v, int len){
	if(ok) return;
	used[v] = timer;
	for(auto [to, idx] : g[v]){
		if(used[to] == timer &&  (idx < l or idx > r)){
			if(len % 2 == 1){
				ok = 1;
				return;
			}
		}else if(used[to] < timer && (idx < l or idx > r)){
			dfs(to, len + 1);
		}
	}
	used[v] = timer + 1;
}

main(){
   ios::sync_with_stdio(0);
   cin.tie(0); cout.tie(0);
	cin >> n >> m >> q;
	for(int i = 0;i < m; i++){
		int a, b; cin >> a >> b;
		g[a].push_back({b, i + 1});
		g[b].push_back({a, i + 1});
	}
	while(q--){
		cin >> l >> r;
		ok = 0;
		for(int i = 1;i <= n; i++){
			if(used[i] < timer){
				dfs(i, 1);
			}
		}
		cout << (ok ? "YES" : "NO") << '\n';
		timer+= 2;
	}
	return 0;
}

Compilation message

Joker.cpp:28:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   28 | main(){
      | ^~~~

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5724 KB Output is correct
2 Correct 1 ms 5760 KB Output is correct
3 Correct 1 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Incorrect 1 ms 5724 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5724 KB Output is correct
2 Correct 1 ms 5760 KB Output is correct
3 Correct 1 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Incorrect 1 ms 5724 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5724 KB Output is correct
2 Correct 1 ms 5760 KB Output is correct
3 Execution timed out 2041 ms 17364 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5724 KB Output is correct
2 Correct 1 ms 5760 KB Output is correct
3 Correct 1 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Incorrect 1 ms 5724 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5724 KB Output is correct
2 Correct 1 ms 5760 KB Output is correct
3 Correct 1 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Incorrect 1 ms 5724 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 5724 KB Output is correct
2 Correct 1 ms 5760 KB Output is correct
3 Correct 1 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Incorrect 1 ms 5724 KB Output isn't correct
6 Halted 0 ms 0 KB -