Submission #994696

#	Time	Username	Problem	Language	Result	Execution time	Memory
994696		kym	Jobs (BOI24_jobs)	C++14	0 / 100	2060 ms	101448 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];
deque<pi> dfs(int x){
	deque<pi>dq;
	for(auto v:child[x]){
		deque<pi> dd=dfs(v);
		for(auto x:dd)dq.push_back(x);
	}
	sort(dq.begin(),dq.end());
	if(A[x]>=0){
		/*
		for(auto &v:dq){
			v.first-=A[x];
			v.first=max(0ll,v.first);
		}*/
		dq.push_front({0ll,A[x]});
	} else{
		int s=A[x];
		while(dq.size() && dq.front().second + s < 0){
			s+=dq.front().second;
			dq.pop_front();
		}
		if(dq.size()){
			pi x=dq.front();
			x.second+=s;
			dq.pop_front();
			dq.push_front(x);
		}
		for(auto &v:dq){
			v.first=max(v.first,-A[x]);
		}
	}
	return dq;
}
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);
	}
	deque<pi> dq=dfs(0);
	int ans=0;
	while(dq.size() && dq.front().first <= init){
		init+=dq.front().second;
		ans+=dq.front().second;
		dq.pop_front();
	}
	cout<<ans;
}

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