Submission #994648

#	Time	Username	Problem	Language	Result	Execution time	Memory
994648		kym	Jobs (BOI24_jobs)	C++14	11 / 100	140 ms	58196 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long 
#ifdef LOCAL
void debug_out() {cerr<<endl;}
template <typename Head, typename... Tail>
void debug_out(Head _H, Tail... _T) {cerr<<" "<<to_string(_H);debug_out(_T...);}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:",debug_out(__VA_ARGS__)
#else
#define debug(...)
#endif
const int MAXN = 300005;
const int inf=1000000500ll;
const long long oo =1000000000000000500ll;
const int MOD = (int)1e9+7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef pair<int,int> pi; 
int n,init;
int A[MAXN], P[MAXN];
vector<int>child[MAXN];
int lazy[MAXN];
priority_queue<pi,vector<pi>,greater<pi>> * dfs(int x){
	priority_queue<pi,vector<pi>,greater<pi>> * pq = new priority_queue<pi,vector<pi>,greater<pi>>();
	for(auto v:child[x]){
		priority_queue<pi,vector<pi>,greater<pi>> * c = dfs(v);
		if(c->size() > pq->size()){
			swap(c,pq);
			swap(lazy[v],lazy[x]);
		}
		while(c->size()){
			pi cur = c->top();
			pq->push({cur.first+lazy[v] - lazy[x],cur.second});
			c->pop();
		}
	}
	if(A[x]>=0){
		pq->push({0,A[x]});
	} else{
		
		
		int s=A[x];
		while(pq->size()){
			if(pq->top().second + s < 0){
				s+=pq->top().second;
				pq->pop();
			} else{
				pi c=pq->top();
				int rem=pq->top().second + s;
				pq->pop();
				pq->push({c.first,rem});
				break;
			}
		}
		lazy[x]+=-A[x];
	}
	return pq;
}
int32_t main() 
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin >> n >> init;
	for(int i=1;i<=n;i++){
		cin>>A[i]>>P[i];
		child[P[i]].push_back(i);
	}
	priority_queue<pi,vector<pi>,greater<pi>> * pq =dfs(0);
	int ans=0;
	while(pq->size() && pq->top().first+lazy[0]<=init){
		ans += pq->top().second;
		init += pq->top().second;
		pq->pop();
	}
	cout<<ans;
}

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