oj.uz

답안 #951988

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
951988 2024-03-23T03:29:49 Z vjudge1 Museum (CEOI17_museum) C++17
80 / 100
 3000 ms 784976 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN=1e4+5;
int n,k,x,inu,inv,inw,dp[MAXN][MAXN][2],siz[MAXN],minn=INT_MAX;
vector <pair<int,int> > lis[MAXN];
void dfs(int u,int fa){
	dp[u][1][0]=0;
	dp[u][1][1]=0;
	siz[u]=1;
	for(auto it:lis[u]){
		int v=it.first;
		int w=it.second;
		if(v==fa) continue;
		dfs(v,u);
		siz[u]+=siz[v];
		for(int i=min(siz[u],k);i>=1;i--)
			for(int j=1;j<=min(siz[v],i-1);j++){
				//if(i-j-2){
					dp[u][i][0]=min(dp[u][i][0],dp[u][i-j][0]+dp[v][j][0]+w*2);
					dp[u][i][1]=min(dp[u][i][1],dp[u][i-j][1]+dp[v][j][0]+w*2);
					dp[u][i][1]=min(dp[u][i][1],dp[u][i-j][0]+dp[v][j][1]+w);
			}
		
	}
}
int main(){
//	freopen("museum.in","r",stdin);
//	freopen("museum.out","w",stdout);
	scanf("%d%d%d",&n,&k,&x);
	for(int i=1;i<n;i++){
		scanf("%d%d%d",&inu,&inv,&inw);
		lis[inu].push_back({inv,inw});
		lis[inv].push_back({inu,inw});
	}
	memset(dp,0x3f,sizeof dp);
	dfs(x,-1);
/*	for(int i=1;i<=n;i++){
		printf("I%d\n",i);
		for(int j=1;j<=k;j++) printf("%d %d   ",dp[i][j][0],dp[i][j][1]);
		printf("\n");
  }*/
	printf("%d",min(dp[x][k][0],dp[x][k][1]));
}

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:31:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |   scanf("%d%d%d",&inu,&inv,&inw);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 398 ms 784208 KB Output is correct
2 Correct 286 ms 784176 KB Output is correct
3 Correct 223 ms 784108 KB Output is correct
4 Correct 227 ms 784448 KB Output is correct
5 Correct 224 ms 784208 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 233 ms 784724 KB Output is correct
2 Correct 232 ms 784720 KB Output is correct
3 Correct 272 ms 784976 KB Output is correct
4 Correct 264 ms 784972 KB Output is correct
5 Correct 243 ms 784596 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 233 ms 784724 KB Output is correct
2 Correct 232 ms 784720 KB Output is correct
3 Correct 272 ms 784976 KB Output is correct
4 Correct 264 ms 784972 KB Output is correct
5 Correct 243 ms 784596 KB Output is correct
6 Correct 263 ms 784528 KB Output is correct
7 Correct 268 ms 784884 KB Output is correct
8 Correct 256 ms 784648 KB Output is correct
9 Correct 246 ms 784548 KB Output is correct
10 Correct 284 ms 784724 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 398 ms 784208 KB Output is correct
2 Correct 286 ms 784176 KB Output is correct
3 Correct 223 ms 784108 KB Output is correct
4 Correct 227 ms 784448 KB Output is correct
5 Correct 224 ms 784208 KB Output is correct
6 Correct 233 ms 784724 KB Output is correct
7 Correct 232 ms 784720 KB Output is correct
8 Correct 272 ms 784976 KB Output is correct
9 Correct 264 ms 784972 KB Output is correct
10 Correct 243 ms 784596 KB Output is correct
11 Correct 263 ms 784528 KB Output is correct
12 Correct 268 ms 784884 KB Output is correct
13 Correct 256 ms 784648 KB Output is correct
14 Correct 246 ms 784548 KB Output is correct
15 Correct 284 ms 784724 KB Output is correct
16 Correct 295 ms 784792 KB Output is correct
17 Correct 778 ms 784792 KB Output is correct
18 Correct 2061 ms 784908 KB Output is correct
19 Correct 270 ms 784784 KB Output is correct
20 Correct 302 ms 784832 KB Output is correct
21 Execution timed out 3091 ms 784648 KB Time limit exceeded
22 Halted 0 ms 0 KB -