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Submission #939611

# Submission time Handle Problem Language Result Execution time Memory
939611 2024-03-06T15:07:32 Z vjudge1 Chase (CEOI17_chase) C++17
70 / 100
 235 ms 94036 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;
    }
    for(int j=1;j<=k;j++){
        dp[1][j]=fr_sum[1];
    }
    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

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6236 KB Output is correct
2 Correct 2 ms 6244 KB Output is correct
3 Correct 2 ms 6236 KB Output is correct
4 Correct 2 ms 6236 KB Output is correct
5 Correct 2 ms 6236 KB Output is correct
6 Correct 2 ms 6232 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6236 KB Output is correct
2 Correct 2 ms 6244 KB Output is correct
3 Correct 2 ms 6236 KB Output is correct
4 Correct 2 ms 6236 KB Output is correct
5 Correct 2 ms 6236 KB Output is correct
6 Correct 2 ms 6232 KB Output is correct
7 Correct 217 ms 8612 KB Output is correct
8 Correct 24 ms 8536 KB Output is correct
9 Correct 20 ms 8608 KB Output is correct
10 Correct 235 ms 8580 KB Output is correct
11 Correct 79 ms 8540 KB Output is correct
12 Correct 34 ms 8536 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 141 ms 94036 KB Output is correct
2 Correct 128 ms 94036 KB Output is correct
3 Correct 100 ms 90312 KB Output is correct
4 Correct 97 ms 90028 KB Output is correct
5 Correct 146 ms 90080 KB Output is correct
6 Correct 138 ms 90208 KB Output is correct
7 Correct 138 ms 90380 KB Output is correct

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6236 KB Output is correct
2 Correct 2 ms 6244 KB Output is correct
3 Correct 2 ms 6236 KB Output is correct
4 Correct 2 ms 6236 KB Output is correct
5 Correct 2 ms 6236 KB Output is correct
6 Correct 2 ms 6232 KB Output is correct
7 Correct 217 ms 8612 KB Output is correct
8 Correct 24 ms 8536 KB Output is correct
9 Correct 20 ms 8608 KB Output is correct
10 Correct 235 ms 8580 KB Output is correct
11 Correct 79 ms 8540 KB Output is correct
12 Correct 34 ms 8536 KB Output is correct
13 Correct 141 ms 94036 KB Output is correct
14 Correct 128 ms 94036 KB Output is correct
15 Correct 100 ms 90312 KB Output is correct
16 Correct 97 ms 90028 KB Output is correct
17 Correct 146 ms 90080 KB Output is correct
18 Correct 138 ms 90208 KB Output is correct
19 Correct 138 ms 90380 KB Output is correct
20 Incorrect 155 ms 90588 KB Output isn't correct
21 Halted 0 ms 0 KB -