Submission #960160

#	Time	Username	Problem	Language	Result	Execution time	Memory
960160		MinaRagy06	Fireworks (APIO16_fireworks)	C++17	19 / 100	16 ms	1140 KiB

fireworks

#include <bits/stdc++.h>
using namespace std;
#define ll long long

const int N = 305;
const ll inf = 2e18;
vector<array<int, 2>> adj[N];
ll dp[N][N];
int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int n, m;
	cin >> n >> m;
	n += m;
	for (int i = 2; i <= n; i++) {
		int p, c;
		cin >> p >> c;
		adj[p].push_back({i, c});
	}
	for (int i = n; i >= 1; i--) {
		for (int j = 0; j < N; j++) {
			if (adj[i].empty() && j) dp[i][j] = inf;
			for (auto [nxt, w] : adj[i]) {
				ll mn = 1e18;
				for (int k = 0; k <= j; k++) {
					mn = min(mn, dp[nxt][k] + abs(j - k - w));
				}
				dp[i][j] += mn;
				dp[i][j] = min(dp[i][j], inf);
			}
		}
		ll mn = *min_element(dp[i], dp[i] + N);
		for (int j = N - 1; j >= 0; j--) {
			if (dp[i][j] == mn) break;
			dp[i][j] = inf;
		}
	}
	cout << *min_element(dp[1], dp[1] + N) << '\n';
	return 0;
}

• Subtask 1: 0 / 7
• Subtask 2: 19 / 19
• Subtask 3: 0 / 29
• Subtask 4: 0 / 45