oj.uz

답안 #873648

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
873648 2023-11-15T12:27:16 Z vjudge1 Ronald (COCI17_ronald) C++17
120 / 120
 27 ms 6812 KB 
#include<bits/stdc++.h>
#ifdef LOCAL
#include "Essentials/algo/debug.h"
#else
#define debug(...) 69
#endif
using namespace std;

typedef long long     ll;
typedef pair<int,int> pii;

const int N = 1000 + 23;
const ll inf = 1e18;

#define F           first
#define S           second
#define pb          push_back
#define kill(x)     cout<<x<<endl, exit(0);
#define all(x)      x.begin(),x.end()
#define sz(x)       (int)x.size()
#define lc          (v << 1)
#define rc          ((v<<1) |1)
#define int         ll

int n,m;
vector<int> G[N];
int sum=0,cnt=0;
bool mark[N];

void dfs(int v) {
	mark[v] = true;
	cnt ++;
	sum += sz(G[v]);
	for(int u : G[v]) {
		if(!mark[u]) dfs(u);
	}
}


int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(false);
	cin>>n>>m;
	for(int i = 0 ; i < m ; i ++) {
		int v,u; cin>>v>>u;
		G[v].pb(u);
		G[u].pb(v);
	}
	bool ok = true;
	int num = 0;
	for(int i = 1; i<= n ; i++) if(!mark[i]) {
		sum = cnt =0;
		dfs(i);
		num ++;
		ok &= (sum == cnt*(cnt-1));
	}
	cout<<(ok && num <= 2 ? "DA" : "NE") << '\n';
	return 0;
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #5
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #6
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 344 KB Output is correct

Subtask #7
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 8 ms 2024 KB Output is correct
3 Correct 3 ms 860 KB Output is correct
4 Correct 2 ms 860 KB Output is correct

Subtask #8
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 5 ms 1628 KB Output is correct
3 Correct 19 ms 4956 KB Output is correct
4 Correct 27 ms 6812 KB Output is correct