Submission #434054

#	Time	Username	Problem	Language	Result	Execution time	Memory
434054		amoo_safar	Worst Reporter 4 (JOI21_worst_reporter4)	C++17	79 / 100	408 ms	524292 KiB

worst_reporter2

// vaziat meshki-ghermeze !
#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " : " << x << '\n'

using namespace std;

typedef long long ll;
typedef long double ld;
typedef string str;
typedef pair<ll, ll> pll;

const ll Mod = 1000000007LL;
const int N = 2e5 + 10;
const ll Inf = 2242545357980376863LL;
const ll Log = 30;

map<int, ll> mp[N];

int a[N], h[N], c[N];
vector<int> G[N];

void DFS(int u){
	for(auto adj : G[u]){
		if(adj == u) continue;
		DFS(adj);
		if(mp[adj].size() > mp[u].size())
			mp[u].swap(mp[adj]);
		for(auto [la, sm] : mp[adj])
			mp[u][la] += sm;
	}
	ll del = c[u];
	while(del){
		auto it = mp[u].lower_bound(h[u] + 1);
		if(it == mp[u].end())
			break;
		ll rm = min(del, it -> S);
		del -= rm;
		if(rm < it -> S){
			mp[u][it -> F] -= rm;
		} else mp[u].erase(it);
	}
	mp[u][h[u]] += c[u];

	// cerr << "!! " << u << " : \n";
	// for(auto [x, y] : mp[u])
	// 	cerr << x << ' ' << y << '\n';
	// cerr << "------\n";
}
int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n;
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> a[i] >> h[i] >> c[i];
		G[a[i]].pb(i);
		h[i] = -h[i];
	}
	DFS(1);
	
	ll ans = 0;
	for(int i = 1; i <= n; i++) ans += c[i];
	for(auto [la, sm] : mp[1]) ans -= sm;
	cout << ans << '\n';
	return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 65 / 65
• Subtask 3: 0 / 21