Submission #1269194

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269194		chinhhoang	Jobs (BOI24_jobs)	C++20	0 / 100	108 ms	22720 KiB

Main

#include <bits/stdc++.h>
using namespace std;
vector<int>child[300003];
long long sum[300003], mx[300003], energy[300003];
bool alive[300003];
void dfs(int u){
    mx[u] = sum[u];
    for(auto v : child[u]){
        sum[v] = sum[u] + energy[v];
        dfs(v);
        mx[u] = max(mx[u], mx[v]);
    }
}
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n;
    long long s;
    cin >> n >> s;
    for(int i=1;i<=n;i++){
        int p;
        cin >> energy[i] >> p;
        if(p == 0) alive[i] = 1;
        else child[p].push_back(i);
    }
    long long ans = 0;
    for(int i=1;i<=n;i++){
        if(alive[i]){
            sum[i] = energy[i];
            dfs(i);
            ans += max(0ll,mx[i]);
        }
    }
    cout << ans;
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 14
• Subtask 3: 0 / 15
• Subtask 4: 0 / 29
• Subtask 5: 0 / 31