#include "cyberland.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5, K = 67;
double dist[N][K];
vector<pair<int, int> > g[N];
bool vis[N], source[N];
int a[N], H;
void dfs(int node)
{
vis[node] = true;
if(a[node] == 0)
{
source[node] = true;
}
if(node == H)
{
return;
}
for(auto [to, wt]: g[node])
{
if(!vis[to])
{
dfs(to);
}
}
}
double solve(int n, int m, int k, int h,
vector<int> x, vector<int> y, vector<int> c,
vector<int> arr)
{
H = h;
k = min(k, 66);
for(int i = 0; i <= n; i++)
{
source[i] = false;
vis[i] = false;
if(i != n) a[i] = arr[i];
g[i].clear();
for(int j = 0; j <= k; j++)
{
dist[i][j] = 1e14;
}
}
for(int i = 0; i < m; i++)
{
g[x[i]].push_back({y[i], c[i]});
g[y[i]].push_back({x[i], c[i]});
}
dfs(0);
source[0] = true;
if(!vis[H])
{
return -1;
}
priority_queue<pair<double, int> > pq;
for(int i = 0; i < n; i++)
{
// cout << "source[i] = " << source[i] << "\n";
if(source[i])
{
pq.push({0, i});
dist[i][0] = 0;
}
}
while(!pq.empty())
{
auto [dis, p] = pq.top();
pq.pop();
int cur_k = p / 100000, node = p % 100000;
dis = -dis;
if(dist[node][cur_k] < dis || node == h)
{
continue;
}
for(auto [to, wt]: g[node])
{
if(a[to] == 0) continue;
double wt_d = wt;
if(dist[to][cur_k] > dist[node][cur_k] + wt_d)
{
dist[to][cur_k] = dist[node][cur_k] + wt_d;
pq.push({-dist[to][cur_k], to + 100000 * cur_k});
}
if(a[to] == 1 || cur_k == k) continue;
if(dist[to][cur_k + 1] > (dist[node][cur_k] + wt_d) / 2.0)
{
dist[to][cur_k + 1] = (dist[node][cur_k] + wt_d) / 2.0;
pq.push({-dist[to][cur_k + 1], to + 100000 * (cur_k + 1)});
}
}
}
// for(int i = 0; i < n; i++)
// {
// for(int j = 0; j <= k; j++)
// {
// cout << "dist[" << i << "][" << j << "] = " << dist[i][j] << "\n";
// }
// }
for(int i = 1; i <= k; i++)
{
ans = min(ans, dist[h][i]);
}
return ans;
}
Compilation message
cyberland.cpp: In function 'double solve(int, int, int, int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
cyberland.cpp:105:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
105 | ans = min(ans, dist[h][i]);
| ^~~
| abs
cyberland.cpp:107:12: error: 'ans' was not declared in this scope; did you mean 'abs'?
107 | return ans;
| ^~~
| abs
