oj.uz

답안 #939607

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
939607 2024-03-06T15:03:27 Z vjudge1 Chase (CEOI17_chase) C++17
40 / 100
 229 ms 94092 KB 
#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int N=1e5+5;
vector <int> g[N];
int fr_sum[N],x[N];
int dp[N][105];
int n,k;
void dfs(int v,int p){
    for(auto to : g[v]){
        if(to!=p){
            for(int i=1;i<=k;i++)dp[to][i]=max(dp[v][i],dp[v][i-1]+fr_sum[to]-x[v]);
            dfs(to,v);
        }
    }
}
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);cout.tie(0);
    cin>>n>>k;
    for(int i=1;i<=n;i++)cin>>x[i];
    for(int i=1;i<n;i++){
        int u,v;
        cin>>u>>v;
        g[u].pb(v);
        g[v].pb(u);
        fr_sum[v]+=x[u];
        fr_sum[u]+=x[v];
    }
    int ans=0;
    if(n<=1000){
        for(int i=1;i<=n;i++){
            for(int j=1;j<=n;j++){
                for(int t=0;t<=k;t++){
                    dp[j][t]=0;
                }
            }
            for(int j=1;j<=k;j++){
                dp[i][j]=fr_sum[i];
            }
            dfs(i,0);
            for(int j=1;j<=n;j++){
                for(int t=0;t<=k;t++){
                    ans=max(ans,dp[j][t]);
                }
            }
        }
        cout<<ans<<"\n";
        return 0;
    }
    dfs(1,0);
    for(int j=1;j<=n;j++){
        for(int t=0;t<=k;t++){
            ans=max(ans,dp[j][t]);
        }
    }
    cout<<ans<<"\n";
}
/*
 12 2
 2 3 3 8 1 5 6 7 8 3 5 4
 2 1
 2 7
 3 4
 4 7
 7 6
 5 6
 6 8
 6 9
 7 10
 10 11
 10 12
*/

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6232 KB Output is correct
2 Correct 1 ms 6232 KB Output is correct
3 Correct 1 ms 6236 KB Output is correct
4 Correct 2 ms 6644 KB Output is correct
5 Correct 2 ms 6236 KB Output is correct
6 Correct 1 ms 6236 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6232 KB Output is correct
2 Correct 1 ms 6232 KB Output is correct
3 Correct 1 ms 6236 KB Output is correct
4 Correct 2 ms 6644 KB Output is correct
5 Correct 2 ms 6236 KB Output is correct
6 Correct 1 ms 6236 KB Output is correct
7 Correct 217 ms 8536 KB Output is correct
8 Correct 22 ms 8540 KB Output is correct
9 Correct 24 ms 8540 KB Output is correct
10 Correct 229 ms 8592 KB Output is correct
11 Correct 80 ms 8540 KB Output is correct
12 Correct 33 ms 8540 KB Output is correct

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 147 ms 94092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6232 KB Output is correct
2 Correct 1 ms 6232 KB Output is correct
3 Correct 1 ms 6236 KB Output is correct
4 Correct 2 ms 6644 KB Output is correct
5 Correct 2 ms 6236 KB Output is correct
6 Correct 1 ms 6236 KB Output is correct
7 Correct 217 ms 8536 KB Output is correct
8 Correct 22 ms 8540 KB Output is correct
9 Correct 24 ms 8540 KB Output is correct
10 Correct 229 ms 8592 KB Output is correct
11 Correct 80 ms 8540 KB Output is correct
12 Correct 33 ms 8540 KB Output is correct
13 Incorrect 147 ms 94092 KB Output isn't correct
14 Halted 0 ms 0 KB -