제출 #370991

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
370991		FatihSolak	Ronald (COCI17_ronald)	C++17	120 / 120	136 ms	3360 KiB

ronald

#include <bits/stdc++.h>
#define N 1005
using namespace std;
bool adj[N][N];
int n,m;
bool calc(){
	vector<int> ch;
	for(int i=2;i<=n;i++){
		if(!adj[1][i]){
			ch.push_back(i);
		}
	}
	for(auto u:ch){
		for(int i=1;i<=n;i++){
			if(u != i)
				adj[u][i] = adj[i][u] = !adj[u][i];
		}
	}
	int cnt = 0;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			cnt += adj[i][j];
		}
	}
	return cnt == (n*(n-1));
}
int main(){
	cin >> n >> m;
	for(int i=0;i<m;i++){
		int a,b;
		cin >> a >> b;
		adj[a][b] = 1;
		adj[b][a] = 1;
	}
	bool ok = calc();
	for(int i=2;i<=n;i++){
		adj[1][i] = adj[i][1] = !adj[1][i];
	}
	ok |= calc();
	cout << (ok?"DA":"NE") << endl;
}

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 15 / 15
• Subtask 6: 15 / 15
• Subtask 7: 15 / 15
• Subtask 8: 15 / 15