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답안 #952151

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
952151 2024-03-23T06:49:04 Z vjudge1 Museum (CEOI17_museum) C++14
100 / 100
 535 ms 784976 KB 
#include<bits/stdc++.h>
using namespace std;
const int N=1e4+5;
struct edge{
	int to,w;
};
int dp[N][N][2],son[N];
vector<edge>G[N];
int n,k,x;
inline void dfs(int u,int fa){
	son[u]=1;
	dp[u][1][1]=dp[u][1][0]=0;
	for(auto v:G[u]){
		if(v.to==fa) continue;
		dfs(v.to,u);
		for(int i=min(k,son[u]);i>=0;i--)
			for(int j=min(k-i,son[v.to]);j>=0;j--){
				dp[u][i+j][1]=min(dp[u][i+j][1],dp[u][i][1]+dp[v.to][j][1]+v.w*2);
				dp[u][i+j][0]=min(dp[u][i+j][0],dp[u][i][1]+dp[v.to][j][0]+v.w);
				dp[u][i+j][0]=min(dp[u][i+j][0],dp[u][i][0]+dp[v.to][j][1]+v.w*2);
			}
		son[u]+=son[v.to];
	}
}
int main(){
//	freopen("museum.in","r",stdin);
//	freopen("museum.out","w",stdout);
	memset(dp,0x3f,sizeof dp);
	scanf("%d%d%d",&n,&k,&x);
	for(int i=1;i<n;i++){
		int u,v,w;scanf("%d%d%d",&u,&v,&w);
		G[u].push_back({v,w});G[v].push_back({u,w});
	}
	dfs(x,0);
	printf("%d",min(dp[x][k][1],dp[x][k][0]));
	return 0;
}

Compilation message

museum.cpp: In function 'int main()':
museum.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |  scanf("%d%d%d",&n,&k,&x);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
museum.cpp:31:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |   int u,v,w;scanf("%d%d%d",&u,&v,&w);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 293 ms 784212 KB Output is correct
2 Correct 222 ms 784064 KB Output is correct
3 Correct 296 ms 784024 KB Output is correct
4 Correct 214 ms 784212 KB Output is correct
5 Correct 215 ms 784212 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 221 ms 784572 KB Output is correct
2 Correct 222 ms 784468 KB Output is correct
3 Correct 232 ms 784864 KB Output is correct
4 Correct 219 ms 784724 KB Output is correct
5 Correct 220 ms 784572 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 221 ms 784572 KB Output is correct
2 Correct 222 ms 784468 KB Output is correct
3 Correct 232 ms 784864 KB Output is correct
4 Correct 219 ms 784724 KB Output is correct
5 Correct 220 ms 784572 KB Output is correct
6 Correct 226 ms 784440 KB Output is correct
7 Correct 231 ms 784724 KB Output is correct
8 Correct 225 ms 784464 KB Output is correct
9 Correct 230 ms 784680 KB Output is correct
10 Correct 223 ms 784572 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 293 ms 784212 KB Output is correct
2 Correct 222 ms 784064 KB Output is correct
3 Correct 296 ms 784024 KB Output is correct
4 Correct 214 ms 784212 KB Output is correct
5 Correct 215 ms 784212 KB Output is correct
6 Correct 221 ms 784572 KB Output is correct
7 Correct 222 ms 784468 KB Output is correct
8 Correct 232 ms 784864 KB Output is correct
9 Correct 219 ms 784724 KB Output is correct
10 Correct 220 ms 784572 KB Output is correct
11 Correct 226 ms 784440 KB Output is correct
12 Correct 231 ms 784724 KB Output is correct
13 Correct 225 ms 784464 KB Output is correct
14 Correct 230 ms 784680 KB Output is correct
15 Correct 223 ms 784572 KB Output is correct
16 Correct 241 ms 784464 KB Output is correct
17 Correct 294 ms 784468 KB Output is correct
18 Correct 249 ms 784724 KB Output is correct
19 Correct 296 ms 784892 KB Output is correct
20 Correct 246 ms 784592 KB Output is correct
21 Correct 357 ms 784828 KB Output is correct
22 Correct 318 ms 784592 KB Output is correct
23 Correct 535 ms 784652 KB Output is correct
24 Correct 339 ms 784684 KB Output is correct
25 Correct 388 ms 784976 KB Output is correct