Submission #1011737

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011737		ttamx	Jobs (BOI24_jobs)	C++17	100 / 100	306 ms	105556 KiB

Main

#include <bits/stdc++.h>

using namespace std;

using ll = long long;

const int N=3e5+5;

int n;
ll s;
ll a[N];
vector<int> adj[N];

struct DP:map<ll,ll>{
    void push(ll x,ll d){
        (*this)[x]+=d;
    }
    void pop(ll x){
        auto it=begin();
        ll cur=-x,last=x;
        for(;it!=end()&&cur<0;it=erase(it)){
            last=max(last,it->first-cur);
            cur+=it->second;
        }
        for(;it!=end()&&it->first<last;it=erase(it)){
            cur+=it->second;
        }
        if(cur>0)push(last,cur);
    }
}dp[N];

void dfs(int u){
    for(auto v:adj[u]){
        dfs(v);
        if(dp[v].size()>dp[u].size())swap(dp[u],dp[v]);
        for(auto [x,y]:dp[v])dp[u].push(x,y);
    }
    if(a[u]>=0)dp[u].push(0,a[u]);
    else dp[u].pop(-a[u]);
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> s;
    for(int i=1;i<=n;i++){
        int p;
        cin >> a[i] >> p;
        adj[p].emplace_back(i);
    }
    dfs(0);
    ll ans=0;
    for(auto [x,y]:dp[0])if(x<=s)s+=y,ans+=y;
    cout << ans;
}

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