oj.uz

답안 #121683

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
121683 2019-06-27T00:21:54 Z sofhiasouza Chase (CEOI17_chase) C++14
30 / 100
 2133 ms 80224 KB 
#include <bits/stdc++.h>
#define pb push_back
using namespace std;
typedef long long int ll;
 
const int maxn = 1e5+10;
 
int n, v, vet[maxn];
ll dp[maxn][110], soma[maxn];
 
vector < int > grafo[maxn];

ll dfs(int u, int val, int pai)
{
	if(val == 0) return 0;
	if(dp[u][val]) return dp[u][val];
 
	ll resp1 = 0, resp2 = 0, cont = 0;
	for(int i = 0 ; i < (int) grafo[u].size() ; i++)
	{
		int v = grafo[u][i];

		if(v == pai) continue;
 
		dp[u][val] = max({dp[u][val], dfs(v, val, u), dfs(v, val-1, u) + soma[v] - vet[u]});
	}
	return dp[u][val];
}

void roda(int u, int pai) {

}
 
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
 
	cin >> n >> v;
	
	for(int i = 1 ; i <= n ; i++) cin >> vet[i];
 
	for(int i = 0 ; i < n-1 ; i++)
	{
		int a, b;
		cin >> a >> b;
		grafo[a].pb(b);
		grafo[b].pb(a);
	}

	for(int i = 1; i <= n; i++) {
		for(auto v : grafo[i]) {
			soma[i] += vet[v];
		}
	}

	ll resp = dfs(1, 1, 0);
	for(int k = 1; k <= v; k++)
		resp = max({resp, dfs(1, k, 0), dfs(1, k-1, 0) + soma[1]});

	if(n <= 1000)
	{
		for(int i = 2 ; i <= n ; i++)
		{
			for(int j = 0 ; j <= n ; j++)
				for(int k = 0 ; k <= v ; k++) dp[j][k] = 0;
					
			for(int k = 1; k <= v; k++)
				resp = max({resp, dfs(i, k, 0), dfs(i, k-1, 0) + soma[i]});
		}
	}
 
	cout << resp << endl;
}

Compilation message

chase.cpp: In function 'll dfs(int, int, int)':
chase.cpp:18:5: warning: unused variable 'resp1' [-Wunused-variable]
  ll resp1 = 0, resp2 = 0, cont = 0;
     ^~~~~
chase.cpp:18:16: warning: unused variable 'resp2' [-Wunused-variable]
  ll resp1 = 0, resp2 = 0, cont = 0;
                ^~~~~
chase.cpp:18:27: warning: unused variable 'cont' [-Wunused-variable]
  ll resp1 = 0, resp2 = 0, cont = 0;
                           ^~~~

Subtask #1
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Correct 4 ms 2660 KB Output is correct
3 Correct 4 ms 2688 KB Output is correct
4 Correct 4 ms 2688 KB Output is correct
5 Incorrect 4 ms 2688 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Correct 4 ms 2660 KB Output is correct
3 Correct 4 ms 2688 KB Output is correct
4 Correct 4 ms 2688 KB Output is correct
5 Incorrect 4 ms 2688 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1374 ms 54904 KB Output is correct
2 Correct 1511 ms 54868 KB Output is correct
3 Correct 371 ms 7536 KB Output is correct
4 Correct 153 ms 77816 KB Output is correct
5 Correct 2133 ms 80224 KB Output is correct
6 Correct 2129 ms 80224 KB Output is correct
7 Correct 2029 ms 80064 KB Output is correct

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Correct 4 ms 2660 KB Output is correct
3 Correct 4 ms 2688 KB Output is correct
4 Correct 4 ms 2688 KB Output is correct
5 Incorrect 4 ms 2688 KB Output isn't correct
6 Halted 0 ms 0 KB -