#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include "cyberland.h"
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define onbit __builtin_popcount
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e18
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
using namespace __gnu_pbds;
template <class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const ll MOD = 1e9+7;
const int nax = 1e5+5;
const int MAX_VAL = 1e6;
double PI=3.14159265359;
int arx[8]={1,1,0,-1,-1,-1, 0, 1};
int ary[8]={0,1,1, 1, 0,-1,-1,-1};
void setIO(string s) {
freopen((s + ".in").c_str(), "r", stdin);
freopen((s + ".out").c_str(), "w", stdout);
}
vector<pair<int,double>> adj[nax];
int lst,cnt;
vector<bool> vis(nax,0);
double power[100];
double dis[nax][70];
void dfs(int x){
vis[x]=true;
if (x==lst) return;
for(auto u:adj[x]){
if (vis[u.fi]==true) continue;
dfs(u.fi);
}
return;
}
double solve(int N, int M, int K, int H, std::vector<int> x, std::vector<int> y, std::vector<int> c, std::vector<int> arr) {
lst=H;
cnt=min(K,66);
arr[0]=0;
power[0]=1.0;
for (int i = 1; i <= cnt; ++i)
{
power[i]=power[i-1]/2.0;
}
for (int i = 0; i < N; ++i)
{
adj[i].clear();
for (int j = 0; j <= cnt; ++j)
{
dis[i][j]=1e18;
}
vis[i]=false;
}
for (int i = 0; i < M; ++i)
{
adj[x[i]].pb({y[i],c[i]});
adj[y[i]].pb({x[i],c[i]});
}
dfs(0);
priority_queue<pair<double,pair<int,int>>,vector<pair<double,pair<int,int>>>,greater<>> pq;
pq.push({0,{H,0}});
dis[H][0]=0;
while(!pq.empty()){
int node=pq.top().se.fi;
int lvl=pq.top().se.se;
double distance=pq.top().fi;
pq.pop();
//cout << node<<" "<<distance<<" "<<lvl<<endl;
if (dis[node][lvl]<(distance)) continue;
if (arr[node]==0) return distance;
for(auto u:adj[node]){
if (vis[u.fi]==false) continue;
//cout <<"ee"<<u.fi<<" "<< dis[u.fi][lvl]<<" "<<power[lvl]*u.se<<endl;
if (dis[node][lvl]+power[lvl]*u.se<dis[u.fi][lvl]){
dis[u.fi][lvl]=dis[node][lvl]+power[lvl]*u.se;
pq.push({dis[u.fi][lvl],{u.fi,lvl}});
}
if(arr[u.fi]==2&& lvl<K && dis[node][lvl]+power[lvl]*u.se<dis[u.fi][lvl+1] ){
dis[u.fi][lvl+1]=dis[node][lvl]+power[lvl]*u.se;
pq.push({dis[u.fi][lvl+1],{u.fi,lvl+1}});
}
}
}
return -1;
}
/*int main(){
optimise;
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
int T;
assert(1 == scanf("%d", &T));
while (T--){
int N,M,K,H;
assert(4 == scanf("%d %d %d\n%d", &N, &M, &K, &H));
std::vector<int> x(M);
std::vector<int> y(M);
std::vector<int> c(M);
std::vector<int> arr(N);
for (int i=0;i<N;i++)
assert(1 == scanf("%d", &arr[i]));
for (int i=0;i<M;i++)
assert(3 == scanf("%d %d %d", &x[i], &y[i], &c[i]));
printf("%.12lf\n", solve(N, M, K, H, x, y, c, arr));
}
}*/
Compilation message
cyberland.cpp: In function 'void setIO(std::string)':
cyberland.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
34 | freopen((s + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cyberland.cpp:35:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
35 | freopen((s + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
19 ms |
2772 KB |
Wrong Answer. |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
19 ms |
3412 KB |
Correct. |
2 |
Correct |
25 ms |
3340 KB |
Correct. |
3 |
Correct |
23 ms |
3340 KB |
Correct. |
4 |
Correct |
22 ms |
3396 KB |
Correct. |
5 |
Correct |
25 ms |
3412 KB |
Correct. |
6 |
Correct |
21 ms |
8916 KB |
Correct. |
7 |
Correct |
27 ms |
8816 KB |
Correct. |
8 |
Correct |
15 ms |
15008 KB |
Correct. |
9 |
Correct |
22 ms |
2772 KB |
Correct. |
10 |
Correct |
22 ms |
2772 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
25 ms |
3356 KB |
Correct. |
2 |
Correct |
21 ms |
3284 KB |
Correct. |
3 |
Correct |
20 ms |
3412 KB |
Correct. |
4 |
Correct |
22 ms |
2788 KB |
Correct. |
5 |
Correct |
22 ms |
2772 KB |
Correct. |
6 |
Correct |
7 ms |
7636 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
43 ms |
39500 KB |
Correct. |
2 |
Incorrect |
22 ms |
3284 KB |
Wrong Answer. |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
21 ms |
3412 KB |
Correct. |
2 |
Correct |
24 ms |
3412 KB |
Correct. |
3 |
Correct |
23 ms |
3448 KB |
Correct. |
4 |
Correct |
26 ms |
9300 KB |
Correct. |
5 |
Correct |
23 ms |
2772 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
28 ms |
3412 KB |
Correct. |
2 |
Correct |
21 ms |
3388 KB |
Correct. |
3 |
Correct |
80 ms |
50548 KB |
Correct. |
4 |
Correct |
17 ms |
7508 KB |
Correct. |
5 |
Correct |
21 ms |
2772 KB |
Correct. |
6 |
Correct |
21 ms |
3540 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
26 ms |
3536 KB |
Wrong Answer. |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
24 ms |
3552 KB |
Wrong Answer. |
2 |
Halted |
0 ms |
0 KB |
- |