Submission #1015020

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015020		12345678	Jobs (BOI24_jobs)	C++17	100 / 100	323 ms	112676 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=3e5+5;

ll n, s, x[nx], pa[nx], res;
vector<ll> d[nx];
multiset<pair<ll, ll>> ms[nx];

void dfs(int u)
{
    for (auto v:d[u]) 
    {
        dfs(v);
        if (ms[v].size()>ms[u].size()) swap(ms[v], ms[u]);
        for (auto y:ms[v]) ms[u].insert(y);
    }
    if (x[u]>=0) ms[u].insert({0, x[u]});
    else
    {
        ll mn=x[u], vl=x[u];
        while (vl<0&&!ms[u].empty())
        {
            vl-=ms[u].begin()->first;
            mn=min(mn, vl);
            vl+=ms[u].begin()->first+ms[u].begin()->second;
            ms[u].erase(ms[u].begin());
        }
        if (vl>=0) 
        {
            mn=-mn;
            while (!ms[u].empty()&&ms[u].begin()->first<=mn) vl+=ms[u].begin()->second, ms[u].erase(ms[u].begin());
            ms[u].insert({mn, vl});
        }
    }
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>s;
    for (int i=1; i<=n; i++) cin>>x[i]>>pa[i], d[pa[i]].push_back(i);
    dfs(0);
    for (auto t:ms[0]) if (s+res>=t.first) res+=t.second;
    cout<<res;
}

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