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답안 #988749

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
988749 2024-05-25T21:46:22 Z noyancanturk Museum (CEOI17_museum) C++17
100 / 100
 523 ms 792276 KB 
#include "bits/stdc++.h"
using namespace std;
    
#define pb push_back
    
const int lim=10100;
const int mod=1e9+7;
    
using pii=pair<int,int>;

vector<pii>v[lim];
int sz[lim];
int dp[2][lim][lim];
void dfs(int node,int par){
    sz[node]=1;
    for(int i=0;i<lim;i++){
        dp[0][node][i]=dp[1][node][i]=1e9+1;
    }
    dp[0][node][1]=dp[1][node][1]=0;
    for(auto[child,c]:v[node]){
        if(child==par)continue;
        dfs(child,node);
        for(int i=sz[node];i;i--){
            for(int j=1;j<=sz[child];j++){
                dp[0][node][i+j]=min(dp[0][node][i+j],dp[0][node][i]+dp[0][child][j]+2*c);
                dp[1][node][i+j]=min(
                    {
                        dp[1][node][i+j],
                        dp[0][node][i]+dp[1][child][j]+c,
                        dp[1][node][i]+dp[0][child][j]+2*c
                    }
                );
            }
        }
        sz[node]+=sz[child];
    }
}

signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#ifdef Local  
    freopen(".in","r",stdin);freopen(".out","w",stdout);
#endif
    int n,k,x;
    cin>>n>>k>>x;
    for(int i=0;i<n-1;i++){
        int X,Y,Z;
        cin>>X>>Y>>Z;
        v[X].pb({Y,Z});
        v[Y].pb({X,Z});
    }
    dfs(x,0);
    cout<<dp[1][x][k]<<"\n";
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 2 ms 4700 KB Output is correct
5 Correct 1 ms 3420 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 471 ms 791804 KB Output is correct
2 Correct 488 ms 791896 KB Output is correct
3 Correct 490 ms 792276 KB Output is correct
4 Correct 510 ms 791892 KB Output is correct
5 Correct 490 ms 791876 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 471 ms 791804 KB Output is correct
2 Correct 488 ms 791896 KB Output is correct
3 Correct 490 ms 792276 KB Output is correct
4 Correct 510 ms 791892 KB Output is correct
5 Correct 490 ms 791876 KB Output is correct
6 Correct 494 ms 791856 KB Output is correct
7 Correct 523 ms 791900 KB Output is correct
8 Correct 486 ms 791848 KB Output is correct
9 Correct 464 ms 791880 KB Output is correct
10 Correct 454 ms 791688 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 2 ms 4700 KB Output is correct
5 Correct 1 ms 3420 KB Output is correct
6 Correct 471 ms 791804 KB Output is correct
7 Correct 488 ms 791896 KB Output is correct
8 Correct 490 ms 792276 KB Output is correct
9 Correct 510 ms 791892 KB Output is correct
10 Correct 490 ms 791876 KB Output is correct
11 Correct 494 ms 791856 KB Output is correct
12 Correct 523 ms 791900 KB Output is correct
13 Correct 486 ms 791848 KB Output is correct
14 Correct 464 ms 791880 KB Output is correct
15 Correct 454 ms 791688 KB Output is correct
16 Correct 503 ms 791824 KB Output is correct
17 Correct 463 ms 791960 KB Output is correct
18 Correct 489 ms 791892 KB Output is correct
19 Correct 484 ms 791780 KB Output is correct
20 Correct 468 ms 791888 KB Output is correct
21 Correct 458 ms 791972 KB Output is correct
22 Correct 458 ms 791976 KB Output is correct
23 Correct 497 ms 791640 KB Output is correct
24 Correct 481 ms 791924 KB Output is correct
25 Correct 499 ms 792148 KB Output is correct