Submission #850501

#	Time	Username	Problem	Language	Result	Execution time	Memory
850501		Benmath	Chase (CEOI17_chase)	C++14	40 / 100	329 ms	2148 KiB

chase

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#include <bits/stdc++.h>

using namespace std;
int n;
int v;
long long int p[1010];
vector<int> adjl[1010];
int vis[1010];
long long int dpnula[1010][105];
long long int dp[1010][105];
void dfs(int s){
    vis[s]++;
    long long int suma = 0;
    for (int i = 0;i< adjl[s].size(); i++){
        if(vis[adjl[s][i]] == 0){
    
            suma = suma + p[adjl[s][i]];
        }
    }

    for (int i = 0;i < adjl[s].size(); i++){
        if (vis[adjl[s][i]] == 0){
            dfs(adjl[s][i]);
            for (int j = 1; j <=v; j++){
                dpnula[s][j] = max(dpnula[s][j], dpnula[adjl[s][i]][j-1] + suma);
                dpnula[s][j] = max(dpnula[s][j], dp[adjl[s][i]][j]);
                dp[s][j] = max(dp[s][j], dpnula[adjl[s][i]][j-1] + suma);
                dp[s][j] = max(dp[s][j], dp[adjl[s][i]][j]);
            }
        }
    } 
    
}
int main(){
    cin >> n;
    cin >> v;
    for(int i = 1; i <= n; i++){
        cin >> p[i];
    }
    for(int i = 0; i < (n-1); i++){
        int a, b;
        cin >> a >> b;
        adjl[a].push_back(b);
        adjl[b].push_back(a);
    }
    dfs(1);
    long long int ans = 0;
    for(int i = 1; i<=n; i++){
        for (int k = 1; k<=n; k++){
            for(int t = 0; t<=v; t++){
                dpnula[k][t] = 0;
                dp[k][t] = 0;
            }
            vis[k] = 0;
        }
        dfs(i);
        ans = max(ans, dp[i][v]);
    }
    cout << ans;
}

Compilation message (stderr)

chase.cpp: In function 'void dfs(int)':
chase.cpp:22:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for (int i = 0;i< adjl[s].size(); i++){
      |                    ~^~~~~~~~~~~~~~~~
chase.cpp:29:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for (int i = 0;i < adjl[s].size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 30