제출 #537968

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
537968		Pietra	Burza (COCI16_burza)	C++14	0 / 160	83 ms	105844 KiB

burza

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

const int maxn = 405 ; 

int n, tin[maxn], tout[maxn], timer, k, nivel[maxn], dp[(1<<14)][maxn] ; 
vector<int> grafo[maxn], vec[maxn] ; 

void dfs(int v, int p){ 

	if(nivel[v] >= 0) vec[nivel[v]].push_back(v) ;

	tin[v] = timer + 1 ; 

	for(auto a : grafo[v]){
		if(a == p) continue ; 
		nivel[a] = nivel[v] + 1 ; 
		if(nivel[a] < k) dfs(a, v) ;  
	}

	if(nivel[v] == k-1) timer++ ;

	tout[v] = timer ; 

}

int32_t main(){

	cin >> n >> k ; 

	for(int i = 1 ; i < n ; i++){
		int u, v ; 
		cin >> u >> v ; u--, v-- ; 
		grafo[u].push_back(v) ; grafo[v].push_back(u) ; 
	}

	if(k*k >= n){
		cout << "DA\n" ; exit(0) ; 
	}

	nivel[0] = -1 ; 

	dfs(0, 0) ;  

	for(int i = 0 ; i < (1<<k) ; i++) dp[i][0] = 1 ; 

    for(int mask = 1 ; mask < (1<<k) ; mask++){

    	for(int i = 0 ; i < k ; i++){
    		
    		if(!(mask&(1<<i))) continue ; 

    		for(auto at : vec[i]){
    			if(dp[mask^(1<<i)][tin[at]-1]) dp[mask][tout[at]] = 1 ; 
    		}

    	}

    }

    bool flag = 0 ; 

    for(int i = 0 ; i < (1<<k) ; i++){
    	if(dp[i][timer]){
    		cout << "DA\n" ; exit(0) ; 
    	}
    }

    cout << "NE\n" ; 

}

컴파일 시 표준 에러 (stderr) 메시지

burza.cpp: In function 'int32_t main()':
burza.cpp:62:10: warning: unused variable 'flag' [-Wunused-variable]
   62 |     bool flag = 0 ;
      |          ^~~~

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