Submission #995446

#	Time	Username	Problem	Language	Result	Execution time	Memory
995446		12345678	Jobs (BOI24_jobs)	C++17	11 / 100	84 ms	30544 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=3e5+5;

ll n, s, vs[nx], c[nx], p, dp[nx], res;
vector<ll> d[nx];

void dfs(int u)
{
    vs[u]=1;
    ll sm=c[u];
    for (auto v:d[u]) dfs(v), sm+=dp[v];
    dp[u]=max(0ll, sm);
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>s;
    for (int i=1; i<=n; i++) 
    {
        cin>>c[i]>>p;
        if (p!=0) d[p].push_back(i);
    }
    for (int i=1; i<=n; i++) if (!vs[i]) dfs(i), res+=dp[i];
    cout<<res;
}

/*
6 1
3 0
-3 1
-5 0
2 1
6 3
-4 5
*/

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