Submission #1245130

#	Time	Username	Problem	Language	Result	Execution time	Memory
1245130		PlayVoltz	Magic Tree (CEOI19_magictree)	C++20	100 / 100	118 ms	35988 KiB

magictree

#include <cstdio>
#include <stdio.h>
#include <stdbool.h>
#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
#include <cassert>
#include <random>
#include <chrono>
#include <fstream>
using namespace std;

#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second

vector<pii> vect;
vector<vector<int> > graph;
vector<map<int, int> > s;

void dfs(int node){
	for (auto num:graph[node]){
		dfs(num);
		if (s[num].size()>s[node].size())swap(s[num], s[node]);
		for (auto a:s[num])s[node][a.fi]+=a.se;
	}
	if (vect[node].fi==-1)return;
	s[node][vect[node].fi]+=vect[node].se;
	int c=vect[node].se;
	while (1){
		auto it=s[node].upper_bound(vect[node].fi);
		if (it==s[node].end())break;
		if (c>=it->se)c-=it->se, s[node].erase(it);
		else{
			it->se-=c;
			break;
		}
	}
}

int32_t main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n, m, k, a, ans=0;
	cin>>n>>m>>k;
	graph.resize(n+1);
	s.resize(n+1);
	vect.resize(n+1, mp(-1, -1));
	for (int i=2; i<=n; ++i)cin>>a, graph[a].pb(i);
	while (m--)cin>>a>>vect[a].fi>>vect[a].se;
	dfs(1);
	for (auto a:s[1])ans+=a.se;
	cout<<ans;
}

• Subtask 1: 6 / 6
• Subtask 2: 3 / 3
• Subtask 3: 11 / 11
• Subtask 4: 12 / 12
• Subtask 5: 16 / 16
• Subtask 6: 13 / 13
• Subtask 7: 22 / 22
• Subtask 8: 17 / 17