Submission #1228200

#	Time	Username	Problem	Language	Result	Execution time	Memory
1228200		goduadzesaba	Cyberland (APIO23_cyberland)	C++20	15 / 100	1014 ms	2162688 KiB

cyberland

#include "cyberland.h"
#include <bits/stdc++.h>
using namespace std;
const long long inf=1e18;
bool u[100005]; vector <pair<int,double> > v[100005];
vector <int> pt; int h;
void dfs(int i){
	u[i]=1; if (i==h) return;
	for (auto j:v[i]){
		if (!u[j.first]) dfs(j.first);
	}
}
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++) v[i].clear(); h=H;
	for (int i=0; i<M; i++){
    	v[x[i]].push_back({y[i],c[i]});
    	v[y[i]].push_back({x[i],c[i]});
	}
	arr[0]=0; set <tuple<double, int, int> > s;
	double d[N][K+1];
    for (int i=0; i<N; i++){
    	for (int j=0; j<=K; j++) d[i][j]=inf;
	} d[0][0]=0;
	for (int i=0; i<N; i++) u[i]=0;
	dfs(0);
	for (int i=0; i<N; i++){
		if (arr[i]==0 && u[i]){
			s.insert({0,i,0}); d[i][0]=0;
		}
	} s.insert(make_tuple(0,0,0));
	while (!s.empty()){
		int X=get<1>(*s.begin()),Y=get<2>(*s.begin()); s.erase(s.begin());
		for (auto i:v[X]){
			double w=d[X][Y]+i.second;
			if (d[i.first][Y]>w){
				s.erase(make_tuple(d[i.first][Y],i.first,Y));
				d[i.first][Y]=w;
				s.insert(make_tuple(d[i.first][Y],i.first,Y));
			}
			if (arr[i.first]==0 && d[i.first][Y]>0){
				s.erase(make_tuple(d[i.first][Y],i.first,Y));
				d[i.first][Y]=0;
				s.insert(make_tuple(0,i.first,Y));
			}
		}
		for (auto i:v[X]){
			if (arr[i.first]!=2) continue;
			if (Y+1<=K){
				double w=(d[X][Y]+i.second)/2.0;
				if (d[i.first][Y+1]>w){
					s.erase(make_tuple(d[i.first][Y+1],i.first,Y+1));
					d[i.first][Y+1]=w;
					s.insert(make_tuple(d[i.first][Y+1],i.first,Y+1));
				}
			}
		}
	}
	//for (int i=0; i<N; i++) cout<<i<<" -> "<<d[i]<<"\n";
	double mn=inf;
	for (int i=0; i<=K; i++) mn=min(mn,d[H][i]);
	if (mn==inf) return -1;
	return mn;
}

• Subtask 1: 0 / 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