oj.uz

답안 #199674

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
199674 2020-02-02T17:27:41 Z algorithm16 Chase (CEOI17_chase) C++14
0 / 100
 4000 ms 51560 KB 
#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
vector <int> v[100005];
int arr[100005],s[100005],dp[100005][105],n,v1;
int dfs(int x,int par,int y) {
	int ret=0;
	for(int j=0;j<v[x].size();j++) {
		if(v[x][j]==par) continue;
		ret=max(ret,dfs(v[x][j],x,y));
		if(y) ret=max(ret,dfs(v[x][j],x,y-1)+s[x]-arr[par]);
	}
	dp[x][y]=ret;
	return ret;
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin >> n >> v1;
	for(int i=0;i<n;i++) {
		cin >> arr[i];
	}
	for(int i=0;i<n-1;i++) {
		int a,b;
		cin >> a >> b;
		v[a-1].push_back(b-1);
		v[b-1].push_back(a-1);
	}
	for(int i=0;i<n;i++) {
		for(int j=0;j<v[i].size();j++) {
			s[i]+=arr[v[i][j]];
		}
	}
	for(int i=0;i<=v1;i++) {
		dfs(0,-1,i);
	}
	cout << dp[0][v1];
	return 0;
}

Compilation message

chase.cpp: In function 'int dfs(int, int, int)':
chase.cpp:9:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j=0;j<v[x].size();j++) {
              ~^~~~~~~~~~~~
chase.cpp: In function 'int main()':
chase.cpp:32:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<v[i].size();j++) {
               ~^~~~~~~~~~~~

Subtask #1
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 2680 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 2680 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 4059 ms 51560 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 2680 KB Output isn't correct
2 Halted 0 ms 0 KB -