oj.uz

답안 #1084679

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1084679 2024-09-06T16:41:37 Z BF001 Museum (CEOI17_museum) C++17
20 / 100
 1008 ms 1048576 KB 
#include<bits/stdc++.h>
using namespace std;
 
#define N 10002
#define int long long
#define oo 1e18
#define fi first 
#define se second

typedef pair<int, int> ii;

int dp[2][N][N], n, root, k, siz[N];
vector<ii> adj[N];
 
void dfs(int u, int p){
    siz[u] = 1;
    dp[1][1][u] = dp[0][1][u] = dp[0][0][u] = dp[1][0][u] = 0;
    for (auto x : adj[u]){
        int v = x.fi, w = x.se;
        if (v == p) continue;
        dfs(v, u);
        for (int i = siz[u]; i >= 1; i--){
            for (int j = 1; j <= siz[v]; j++){
                dp[0][i + j][u] = min(dp[0][i + j][u], dp[1][i][u] + dp[0][j][v] + w);
                dp[0][i + j][u] = min(dp[0][i + j][u], dp[0][i][u] + dp[1][j][v] + 2 * w);
                dp[1][i + j][u] = min(dp[1][i + j][u], dp[1][i][u] + dp[1][j][v] + w * 2);
            }
        }
        siz[u] += siz[v];
    }

}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
 
    cin >> n >> k >> root;
    for (int i = 1; i <= n - 1; i++){
        int u, v, w;
        cin >> u >> v >> w;
        adj[u].push_back({v, w});
        adj[v].push_back({u, w});
    } 

    for (int i = 1; i <= n; i++){
        for (int j = 0; j <= n; j++){
            dp[0][j][i] = dp[1][j][i] = oo;
        }
    }   
    
    dfs(root, 0);
    cout << dp[0][k][root];

    return 0;
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 0 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 0 ms 860 KB Output is correct

Subtask #2
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 1008 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 1008 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 0 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 0 ms 860 KB Output is correct
6 Runtime error 1008 ms 1048576 KB Execution killed with signal 9
7 Halted 0 ms 0 KB -