Submission #227612

#	Time	Username	Problem	Language	Result	Execution time	Memory
227612		jiahng	Ronald (COCI17_ronald)	C++14	120 / 120	51 ms	6264 KiB

ronald

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<ll,ll> pi;
typedef vector <ll> vi;
typedef vector <pi> vpi;
#define f first
#define s second
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lbd(x, y) lower_bound(all(x), y)
#define ubd(x, y) upper_bound(all(x), y)
#define aFOR(i,x) for (auto i: x)
#define mem(x,i) memset(x,i,sizeof x)
#define fast ios_base::sync_with_stdio(false),cin.tie(0)
#define maxn 1001

int dist[maxn][maxn];

bool yes = 1;

bool dp[maxn],vis[maxn];
int N,M;

void dfs(int x,bool a){
	vis[x] = 1;

	FOR(i,1,N){
		if (i == x) continue;
		
		if (!vis[i]){
			if (dist[x][i] == 1){
				dp[i] = !a;
				dfs(i,!a);
			}else{
				dp[i] = a;
				dfs(i,a);
			}
		}else{
			if (dist[x][i] == 1){
				//cout<<i<<' '<<x<<'\n';
				if (dp[i] == dp[x]) yes = 0;
			}else{
				
				if (dp[i] != dp[x]) yes = 0;
			}
		}
	}
}
int main(){
	fast;
	
	cin>>N>>M;
	
	FOR(i,1,N){
		FOR(j,1,N) dist[i][j] = 1;
	}
	FOR(i,0,M-1){
		int a,b;
		cin>>a>>b;
		dist[a][b] = dist[b][a] = 0;
	}
	
	FOR(i,1,N){
		if (!vis[i]) dfs(i,0);
	}
	
	//FOR(i,1,N) cout<<dp[i]<<' ';
	//return 0;
	
	if (yes) cout<<"DA";
	else cout<<"NE";
}

• 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