Submission #994568

#	Time	Username	Problem	Language	Result	Execution time	Memory
994568		kym	Jobs (BOI24_jobs)	C++14	0 / 100	2074 ms	27220 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,s;
int dp[MAXN];
int A[MAXN], P[MAXN];
vector<int>child[MAXN];
int st[MAXN];
int rev[MAXN];
int TIME;
void dfs(int x, int p){
	st[x]=TIME;
	rev[TIME]=x;
	++TIME;
	for(auto v:child[x])if(v!=p){
		dfs(v,x);
	}
}
int32_t main() 
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	cin >> n >> dp[0];
	for(int i=1;i<=n;i++)dp[i]=-oo;
	int ans=0;
	for(int i=1;i<=n;i++){
		cin>>A[i]>>P[i];
		child[P[i]].push_back(i);
	}
	dfs(0,-1);	
	for(int i=1;i<=n;i++){ 
		int node=rev[i];
		for(int j=st[P[node]];j<i;j++){
			dp[i]=max(dp[i],dp[j]+A[node]);
		}
		ans=max(ans,dp[i]-dp[0]);
	}
	cout<<ans;
}

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