#include "cyberland.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
const double inf = 1e16;
const int maxn=1e5+5;
const double eps = 0.00000001;
int D[maxn];
vector<pair<int,double>>E[maxn];
int p[maxn];
int ata(int x){
if(p[x] == x) return x;
return p[x] = ata(p[x]);
}
void un(int x,int y){
int aa = ata(x);
int bb = ata(y);
p[bb] = aa;
}
bool con(int x,int y){
int aa = ata(x);
int bb = ata(y);
return (aa == bb);
}
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,50);
for(int i = 0;i < N;i++) E[i].clear(),p[i] = i;
for(int i = 0;i < M;i++){
E[x[i]].push_back({y[i],c[i]});
E[y[i]].push_back({x[i],c[i]});
if(x[i] != H and y[i] != H) un(x[i],y[i]);
}
vector<int>zeros = {0};
vector<int>two;
for(int i = 1;i < N;i++) if(arr[i] == 0 and con(0,i)) zeros.push_back(i);
for(int i = 1;i < N;i++) if(arr[i] == 2) two.push_back(i);
priority_queue<pair<double,int>>q;
q.push({0,H});
double ans = inf;
double der = 1;
for(int i = 0;i <= K;i++){
vector<double>dis(N,inf);
vector<bool>vis(N,0);
while(!q.empty()){
int x = q.top().second;
double len = -q.top().first;
q.pop();
if(vis[x]) continue;
vis[x] = 1;
for(auto j : E[x]){
if(j.first == H) continue;
double now = (j.second / der) + len;
if(dis[j.first] > now){
dis[j.first] = now;
q.push({-now,j.first});
}
}
}
for(auto j : zeros) ans = min(ans,dis[j]);
for(auto j : two) if(abs(dis[j] - inf) >= eps) q.push({-dis[j],j});
der *= 2;
}
if(abs(ans - inf) < eps) return -1;
return ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
30 ms |
2756 KB |
Correct. |
2 |
Correct |
30 ms |
2756 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
21 ms |
2764 KB |
Correct. |
2 |
Correct |
25 ms |
2772 KB |
Correct. |
3 |
Correct |
23 ms |
2860 KB |
Correct. |
4 |
Correct |
25 ms |
2772 KB |
Correct. |
5 |
Correct |
25 ms |
2772 KB |
Correct. |
6 |
Correct |
22 ms |
3720 KB |
Correct. |
7 |
Correct |
28 ms |
3668 KB |
Correct. |
8 |
Correct |
14 ms |
4560 KB |
Correct. |
9 |
Correct |
25 ms |
2644 KB |
Correct. |
10 |
Correct |
25 ms |
2740 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
31 ms |
2820 KB |
Correct. |
2 |
Correct |
28 ms |
2772 KB |
Correct. |
3 |
Correct |
27 ms |
2824 KB |
Correct. |
4 |
Correct |
28 ms |
2644 KB |
Correct. |
5 |
Correct |
27 ms |
2772 KB |
Correct. |
6 |
Correct |
8 ms |
3424 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
239 ms |
8560 KB |
Correct. |
2 |
Correct |
137 ms |
2900 KB |
Correct. |
3 |
Correct |
120 ms |
2780 KB |
Correct. |
4 |
Correct |
132 ms |
2896 KB |
Correct. |
5 |
Correct |
102 ms |
2704 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
21 ms |
2852 KB |
Correct. |
2 |
Correct |
24 ms |
2944 KB |
Correct. |
3 |
Correct |
23 ms |
2928 KB |
Correct. |
4 |
Correct |
23 ms |
3988 KB |
Correct. |
5 |
Correct |
22 ms |
2644 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
28 ms |
2860 KB |
Correct. |
2 |
Correct |
22 ms |
2932 KB |
Correct. |
3 |
Correct |
47 ms |
10048 KB |
Correct. |
4 |
Correct |
17 ms |
3768 KB |
Correct. |
5 |
Correct |
24 ms |
2644 KB |
Correct. |
6 |
Correct |
23 ms |
2968 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
107 ms |
2892 KB |
Correct. |
2 |
Correct |
22 ms |
2920 KB |
Correct. |
3 |
Correct |
348 ms |
11748 KB |
Correct. |
4 |
Correct |
214 ms |
5088 KB |
Correct. |
5 |
Correct |
440 ms |
10432 KB |
Correct. |
6 |
Correct |
181 ms |
9084 KB |
Correct. |
7 |
Correct |
219 ms |
5048 KB |
Correct. |
8 |
Correct |
168 ms |
3232 KB |
Correct. |
9 |
Correct |
96 ms |
2956 KB |
Correct. |
10 |
Correct |
90 ms |
3004 KB |
Correct. |
11 |
Correct |
150 ms |
3044 KB |
Correct. |
12 |
Correct |
113 ms |
2956 KB |
Correct. |
13 |
Correct |
105 ms |
2964 KB |
Correct. |
14 |
Correct |
212 ms |
7376 KB |
Correct. |
15 |
Correct |
200 ms |
4148 KB |
Correct. |
16 |
Correct |
103 ms |
2968 KB |
Correct. |
17 |
Correct |
123 ms |
3072 KB |
Correct. |
18 |
Correct |
101 ms |
2904 KB |
Correct. |
19 |
Correct |
312 ms |
2772 KB |
Correct. |
20 |
Correct |
7 ms |
2644 KB |
Correct. |
21 |
Correct |
9 ms |
2764 KB |
Correct. |
22 |
Correct |
16 ms |
3284 KB |
Correct. |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
175 ms |
3032 KB |
Correct. |
2 |
Correct |
35 ms |
2960 KB |
Correct. |
3 |
Incorrect |
165 ms |
11600 KB |
Wrong Answer. |
4 |
Halted |
0 ms |
0 KB |
- |