Submission #1190200

#	Time	Username	Problem	Language	Result	Execution time	Memory
1190200		kirito	Cyberland (APIO23_cyberland)	C++20	20 / 100	583 ms	10500 KiB

cyberland

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;

const int N = 110000;

vector<pair<int, ll>> g[N];
ld dp[N], tdp[N];

double solve(int n, int m, int k, int h, vector<int> x, vector<int> y, vector<int> c, vector<int> arr) {
	k = min(k, 70);
	for (int i = 0; i < m; i++) {
		int u = x[i], v = y[i], w = c[i];
		g[u].push_back({v, w});
		g[v].push_back({u, w});
	}
	g[h].clear();
	for (int i = 0; i < n; i++)
		dp[i] = tdp[i] = -1;
	dp[0] = 0;
	queue<int> qq;
	qq.push(0);
	while (!qq.empty()) {
		int v = qq.front(); qq.pop();
		for (auto [u, w] : g[v]) {
			if (dp[u] != -1)
				continue;
			dp[u] = 0;
		}
	}
	for (int i = 0; i < n; i++)
		if (arr[i] != 0) dp[i] = -1;
	dp[0] = 0;
	ld ans = 1e18;
	for (int i = 0; i <= k; i++) {
		for (int j = 0; j < n; j++) {
			if (dp[j] == -1) continue;
			if (arr[j] == 2) dp[j] /= 2;
		}
		set<pair<int, ld>> st;
		for (int j = 0; j < n; j++)
			if (dp[j] != -1)
				for (auto [u, w] : g[j]) {
					ld ndp = dp[j] + w;
					if (tdp[u] != -1 && tdp[u] <= ndp) continue;
					st.erase({u, tdp[u]});
					tdp[u] = ndp;
					st.insert({u, tdp[u]});
				}
		while (!st.empty()) {
			int v = st.begin()->first;
			st.erase(st.begin());
			for (auto [u, w] : g[v]) {
				ld ndp = tdp[v] + w;
				if (tdp[u] != -1 && tdp[u] <= ndp) continue;
				st.erase({u, tdp[u]});
				tdp[u] = ndp;
				st.insert({u, tdp[u]});
			}
		}
		for (int j = 0; j < n; j++) {
			dp[j] = tdp[j];
			tdp[j] = -1;
		}
		if (dp[h] != -1)
			ans = min(ans, dp[h]);
	}
	for (int i = 0; i < n; i++)
		g[i].clear();
	if (ans == 1e18)
		ans = -1;
	return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 19
• Subtask 5: 7 / 7
• Subtask 6: 0 / 16
• Subtask 7: 0 / 29
• Subtask 8: 0 / 3