제출 #1037283

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1037283		wood	Joker (BOI20_joker)	C++17	0 / 100	2053 ms	10712 KiB

Joker

#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef pair<int,int> p32;
typedef vector<p32> vp32;
#define pb push_back
#define eb emplace_back
#define fi first
#define se second 

int main(){
	int n,m,q; cin>>n>>m>>q;
	vp32 adj[n];
	for(int i = 0; i<m; i++){
		int a,b; cin>>a>>b;
		a--; b--;
		adj[a].eb(b,i+1);
		adj[b].eb(a,i+1);
	}
	for(int i = 0; i<q; i++){
		int l,r; cin>>l>>r;
		int done[n];
		memset(done,0,sizeof done);
		stack<p32> qu;
		for(int i = 0; i<n; i++){
			if(!done[i]){
				qu.emplace(i,i);
				while(!qu.empty()){
					p32 x = qu.top();
					qu.pop();
					done[x.fi] = done[x.se]+1;
					for(p32 tt : adj[x.fi]){
						if(tt.se<l||tt.se>r){
							if(done[tt.fi]&&done[tt.fi]<done[x.fi]-1){
								goto found;
							}
							if(done[tt.fi]==0){
								qu.emplace(tt.fi,x.fi);
							}
						}
					}
				}
			}
		}
		cout<<"NO\n";
		continue;
found:
		cout<<"YES\n";
	}
	return 0;
}

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