Submission #1128145

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128145		kirakosyan	Jobs (BOI24_jobs)	C++20	0 / 100	150 ms	43868 KiB

Main

#include<algorithm>
#include<iostream>
#include<vector>
#include<string>
#include<random>
#include<cmath>
#include<stack>
#include<map>
#include <iomanip>
#include <queue>
#include <set>
using namespace std;
using ll = long long;
using ull = unsigned long long;
ll mod = 1e9 + 7;
ll pv(ll a, ll b) {
	if (b == 0)return 1;
	ll res = (pv(a, b / 2));
	if (b % 2) {
		return (((res * res) % mod) * (a % mod)) % mod;
	}
	else {
		return (res * res) % mod;
	}
}
ll gcd(ll a, ll b) {
	while (b) {
		a %= b;
		swap(a, b);
	}
	return a;
}
vector<vector<ll>>gp, adj;
vector<ll>dist, x, vis, vis1;
ll ans = 0;
void dfs(ll u, ll p) {
	for (ll& x : adj[u]) {
		if (x != p) {
			dist[x] += dist[u];
			dfs(x, u);
		}
	}
}
void dfs1(ll u) {
	vis[u] = 1;
	ans += x[u];
	for (ll& x : gp[u]) {
		if (vis[x] == 0) {
			dfs1(x);
		}
	}
}
void solve() {

	ll n, s; cin >> n >> s;
	adj = gp = vector<vector<ll>>(n);
	vector<ll> p(n);
	vis = vis1 = dist = x = vector<ll>(n);
	for (ll i = 0; i < n; i++) {
		cin >> x[i] >> p[i];
		p[i]--;
		if (p[i] == -1)continue;
		gp[p[i]].push_back(i);
		adj[i].push_back(p[i]);

	}
	dist = x;
	for (ll i = 0; i < n; i++) {
		if (p[i] == -1) {

			dfs(i, -1);
		}
	}
	for (ll i = 0; i < n; i++) {
		if (dist[i] > 0) {

			dfs1(i);
		}
	}
	cout << ans << endl;

}

signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	ll _ = 1;
	//cin >> _;
	while (_--) {
		solve();
	}
}

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