제출 #858637

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
858637		iskhakkutbilim	Joker (BOI20_joker)	C++17	0 / 100	2041 ms	17364 KiB

Joker

#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;
}

컴파일 시 표준 에러 (stderr) 메시지

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

• Subtask 1: 0 / 6
• Subtask 2: 0 / 8
• Subtask 3: 0 / 25
• Subtask 4: 0 / 10
• Subtask 5: 0 / 22
• Subtask 6: 0 / 29