Submission #759744

#	Time	Username	Problem	Language	Result	Execution time	Memory
759744		OrazB	Cyberland (APIO23_cyberland)	C++17	49 / 100	3072 ms	2097152 KiB

cyberland

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less<int>, rb_tree_tag,
             tree_order_statistics_node_update>
    ordered_set;
//set.find_by_order(x) x-position value
//set.order_of_key(x) number of strictly less elements don't need *set.??
#define N 100005
#define wr cout << "Continue debugging\n";
#define all(x) (x).begin(), (x).end()
#define ll long long int
#define pii pair <double, int>
#define pb push_back
#define ff first
#define ss second

vector<pii> E[N];

double F(int x){
	double res = 1.0;
	while(x--) res *= 2;
	return res;
}

void dfs(int nd, int h, vector<int> arr, vector<int> &z, vector<double> &dis, vector<bool> &vis){
	if (!arr[nd]){
		z.pb(nd);
		dis[nd] = 0;
	} 
	vis[nd] = 1;
	for (auto i : E[nd]){
		if (vis[i.ff] or i.ff == h) continue;
		dfs(i.ff, h, arr, z, dis, vis);	
	}
}

double solve(int n, int m, int k, int h, vector<int> x, vector<int> y, vector<int> c, vector<int> arr){
	for (int i = 0; i < n; i++) E[i].clear();
	for (int i = 0; i < m; i++){
		E[x[i]].pb({y[i], c[i]});
		E[y[i]].pb({x[i], c[i]});	
	}
	vector<int> vec, z = {0};
	vector<bool> vis(n, 0);
	vector<double> dis(n, 1e15);
	dis[0] = 0;
	dfs(0, h, arr, z, dis, vis);
	for (int i = 0; i < n; i++){
		if (arr[i] == 2) vec.pb(i);
	}
	double ans = 1e15;
	set<pii> q;
	for (auto i : z) q.insert({0, i});
	for (int i = 0; i <= k; i++){
		vector<bool> chk(n, 0);
		while(!q.empty()){
			int x = (*q.begin()).ss;
			q.erase(q.begin());
			if (x == h) continue;
			for (auto j : E[x]){
				double res = dis[x]+j.ss;
				if (arr[x] == 2) res = (dis[x]/F(i))+j.ss;
				if (dis[j.ff] > res){
					q.erase({dis[j.ff], j.ff});
					dis[j.ff] = res;
					chk[j.ff] = 1;
					q.insert({dis[j.ff], j.ff});
				}
			}
		}
		for (auto j : vec) if (chk[j]) q.insert({dis[j], j});
		ans = min(ans, dis[h]);
	}
	if (ans == 1e15) return double(-1);
	return ans;
}

// int main () 
// {
// 	int n, m, k, h;
// 	cin >> n >> m >> k >> h;
// 	vector<int> x(m), y(m), c(m), arr(n);
// 	for (int i = 0; i < m; i++){
// 		cin >> x[i] >> y[i] >> c[i];
// 	}
// 	for (int i = 0; i < n; i++) cin >> arr[i];
// 	cout << solve(n,m,k,h,x,y,c,arr);
// }	

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