oj.uz

답안 #101409

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
101409 2019-03-19T01:11:54 Z dwsc Chase (CEOI17_chase) C++14
20 / 100
 4000 ms 10840 KB 
#include <bits/stdc++.h>
using namespace std;
int n,v;
int p[100010];
vector<int> adj[100010];
long long dp(int x,int dist,int pa){
    if (dist == -1) return -1e18;
   // cout << x << " " << dist << " " << pa << '\n';
    long long ans = 0;
    long long sum = 0;
    for (int i = 0; i < (int)(adj[x].size()); i++){
        int nx = adj[x][i];
        if (nx == pa) continue;
        sum += p[nx];
    }
   // cout << sum << "\n";
    for (int i = 0; i < (int)(adj[x].size()); i++){
        int nx = adj[x][i];
        if (nx == pa) continue;
        ans = max(ans,dp(nx,dist-1,x)+sum);
        ans = max(ans,dp(nx,dist,x));
    }
    return ans;
}
int main(){
    cin >> n >> v;
    for (int i = 0; i < n; i++){
        cin >> p[i];
    }
    for (int i = 0; i < n-1; i++){
        int a,b;
        cin >> a >> b;
        a--;
        b--;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    if (n <= 1000){
        long long ans = 0;
        for (int i = 0; i < n; i++){
          //  cout << dp(i,v,-1) << "\n";
            ans = max(ans,dp(i,v,-1));
        }
        cout << ans;
    }
    else cout << dp(0,v,-1);
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 2688 KB Output is correct
2 Correct 5 ms 2688 KB Output is correct
3 Correct 5 ms 2688 KB Output is correct
4 Correct 4 ms 2688 KB Output is correct
5 Correct 4 ms 2716 KB Output is correct
6 Correct 5 ms 2688 KB Output is correct

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 2688 KB Output is correct
2 Correct 5 ms 2688 KB Output is correct
3 Correct 5 ms 2688 KB Output is correct
4 Correct 4 ms 2688 KB Output is correct
5 Correct 4 ms 2716 KB Output is correct
6 Correct 5 ms 2688 KB Output is correct
7 Execution timed out 4010 ms 2688 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 4032 ms 10840 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 2688 KB Output is correct
2 Correct 5 ms 2688 KB Output is correct
3 Correct 5 ms 2688 KB Output is correct
4 Correct 4 ms 2688 KB Output is correct
5 Correct 4 ms 2716 KB Output is correct
6 Correct 5 ms 2688 KB Output is correct
7 Execution timed out 4010 ms 2688 KB Time limit exceeded
8 Halted 0 ms 0 KB -