oj.uz

답안 #952033

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
952033 2024-03-23T03:59:29 Z vjudge1 Museum (CEOI17_museum) C++14
100 / 100
 588 ms 784632 KB 
#include<bits/stdc++.h>
using namespace std;
const int N=10005;
int dp[N][N][2];
vector<pair<int,int> > g[N];
int siz[N];
int n,l,x;
void dfs(int x,int fa)
{
	//cout<<x<<"\n";
	dp[x][1][1]=dp[x][1][0]=0;
	siz[x]=1;
	if(g[x].size()==1&&g[x][0].first==fa)
	{
		return;
	}
	for(auto i:g[x])
	{
		
		int v=i.first;
		int w=i.second;
		if(v==fa) continue;
		dfs(v,x);
		for(int j=min(l,siz[x]);j>=0;j--)
		{
			for(int k=min(l-j,siz[v]);k>=0;k--)
			{
				dp[x][j+k][1]=min(dp[x][j+k][1],dp[x][j][1]+dp[v][k][1]+w*2);
				dp[x][j+k][0]=min(dp[x][j+k][0],dp[x][j][1]+dp[v][k][0]+w);
				dp[x][j+k][0]=min(dp[x][j+k][0],dp[x][j][0]+dp[v][k][1]+w*2);
			}
		}
		siz[x]+=siz[v];
	}
}
int main()
{
	cin>>n>>l>>x;
	for(int i=1;i<n;i++)
	{
		int u,v,w;
		cin>>u>>v>>w;
		g[u].push_back({v,w});
		g[v].push_back({u,w});
	}
	for(int i=1;i<=n;i++)
	{
		for(int j=0;j<=n;j++) dp[i][j][0]=dp[i][j][1]=1e9;
	}
	dfs(x,0);
	cout<<min(dp[x][l][0],dp[x][l][1]);
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 409 ms 784212 KB Output is correct
2 Correct 274 ms 784336 KB Output is correct
3 Correct 266 ms 784468 KB Output is correct
4 Correct 268 ms 784372 KB Output is correct
5 Correct 405 ms 784344 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 409 ms 784212 KB Output is correct
2 Correct 274 ms 784336 KB Output is correct
3 Correct 266 ms 784468 KB Output is correct
4 Correct 268 ms 784372 KB Output is correct
5 Correct 405 ms 784344 KB Output is correct
6 Correct 270 ms 784208 KB Output is correct
7 Correct 267 ms 784460 KB Output is correct
8 Correct 278 ms 784212 KB Output is correct
9 Correct 277 ms 784424 KB Output is correct
10 Correct 272 ms 784212 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 409 ms 784212 KB Output is correct
7 Correct 274 ms 784336 KB Output is correct
8 Correct 266 ms 784468 KB Output is correct
9 Correct 268 ms 784372 KB Output is correct
10 Correct 405 ms 784344 KB Output is correct
11 Correct 270 ms 784208 KB Output is correct
12 Correct 267 ms 784460 KB Output is correct
13 Correct 278 ms 784212 KB Output is correct
14 Correct 277 ms 784424 KB Output is correct
15 Correct 272 ms 784212 KB Output is correct
16 Correct 285 ms 784212 KB Output is correct
17 Correct 343 ms 784328 KB Output is correct
18 Correct 307 ms 784464 KB Output is correct
19 Correct 359 ms 784212 KB Output is correct
20 Correct 294 ms 784160 KB Output is correct
21 Correct 410 ms 784632 KB Output is correct
22 Correct 366 ms 784336 KB Output is correct
23 Correct 588 ms 784248 KB Output is correct
24 Correct 393 ms 784468 KB Output is correct
25 Correct 444 ms 784468 KB Output is correct