#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1000 + 23;
vector<int> g[MAXN];
int such;
vector<int> labels;
int dfs(int v, int p = -1, int nat = -1) {
if (v == such) return nat;
for (auto i : g[v]) if (i != p) {
if (p == -1) {
int tmp = dfs(i, v, i);
if (tmp != -1) return tmp;
}
else {
int tmp = dfs(i, v, nat);
if (tmp != -1) return tmp;
}
}
return -1;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
labels.clear();
for (int i = 0; i < n; i++) labels.push_back(i);
return labels;
// cout << "learn" << endl;
for (int i = 0; i < n; i++) g[i].clear();
///.
cnt = 0;
for (int i = 0; i < n; i++) labels.push_back(0);
for (int i = 0; i < n - 1; i++) {
g[u[i]].push_back(v[i]), g[v[i]].push_back(u[i]);
}
for (int i = 0; i < n; i++) if (g[i].size() == 1) {
dfs(i);
break;
}
// assert(labels.size() == n);
return labels;
}
int find_next_station(int s, int t, vector<int> c) {
such = t;
for (int i = 0; i < n - 1; i++) g[i / 2].push_back(i + 1), g[i + 1].push_back(i / 2);
return dfs(s, t);
}
/*
int main() {
for (auto i : label(3, 8, {0, 1}, {1, 2})) cout << i << endl;
return 0;
}*/
Compilation message
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:35:2: error: 'cnt' was not declared in this scope; did you mean 'int'?
35 | cnt = 0;
| ^~~
| int
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:50:22: error: 'n' was not declared in this scope
50 | for (int i = 0; i < n - 1; i++) g[i / 2].push_back(i + 1), g[i + 1].push_back(i / 2);
| ^
