Submission #914118

#	Time	Username	Problem	Language	Result	Execution time	Memory
914118		SmuggingSpun	Cyberland (APIO23_cyberland)	C++17	0 / 100	3100 ms	22868 KiB

cyberland

#include "cyberland.h"
#include<bits/stdc++.h>
using namespace std;
const double INF = 1e18;
template<class T>void minimize(T& a, T b){
	if(a > b){
		a = b;
	}
}
struct Data{
	int u, k;
	double w;
	Data(int _u, int _k, double _w) : u(_u), k(_k), w(_w) {}
	friend bool operator <(Data a, Data b){
		return a.w > b.w;
	}
};
double solve(int n, int m, int k, int h, vector<int>x, vector<int>y, vector<int>c, vector<int>arr) {
	vector<vector<pair<int, int>>>e(n);
	for(int i = 0; i < m; i++){
		e[x[i]].emplace_back(y[i], c[i]);
		e[y[i]].emplace_back(x[i], c[i]);
	}
	minimize(k, 150);
	priority_queue<Data>q;
	vector<vector<double>>d(n, vector<double>(k + 1, INF));
	q.emplace(0, k, d[0][k] = 0.0);
	while(!q.empty()){
		auto [u, remain, w] = q.top();
		q.pop();
		if(w > d[u][remain] || u == h){
			continue;
		}
		for(auto& [v, weight] : e[u]){
			if(arr[v] == 0){
				if(d[v][remain] > 0.0){
					q.emplace(v, remain, d[v][remain] = 0.0);
				}
			}
			else{
				double W = w + double(weight);
				if(W < d[v][remain]){
					q.emplace(v, remain, d[v][remain] = W);
				}
				if(remain > 0 && (W /= 2.0) < d[v][remain - 1]){
					q.emplace(v, remain - 1, d[v][remain - 1] = W);
				}
			}
		}
	}
	double ans = INF;
	for(int i = 0; i <= k; i++){
		minimize(ans, d[h][i]);
	}
	return ans * 2.0;
}

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