#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pb push_back
#define ar array
#define all(x) x.begin(), x.end()
#define siz(x) (int)x.size()
#define FOR(x, y, z) for(int x = (y); x < (z); x++)
#define ROF(x, z, y) for(int x = (y-1); x >= (z); x--)
#define F0R(x, z) FOR(x, 0, z)
#define R0F(x, z) ROF(x, 0, z)
#define trav(x, y) for(auto&x:y)
using ll = long long;
using vi = vector<int>;
using vl = vector<long long>;
using pii = pair<int, int>;
using vpii = vector<pair<int, int>>;
template<class T> inline bool ckmin(T&a, T b) {return b < a ? a = b, 1 : 0;}
template<class T> inline bool ckmax(T&a, T b) {return b > a ? a = b, 1 : 0;}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const char nl = '\n';
const int mxN = 2e5 + 10;
const int MOD = 1e9 + 7;
const long long infLL = 1e18;
vi res; int tot = 0;
int n, k; vi u, v; vector<vi> adj;
void dfs(int U, int P, int T){
if(!T) res[V] = ++tot;
trav(V, adj[U]){
if(V == P) continue;
dfs(V, U, T^1);
}
if(T) res[U] = ++tot;
}
vi label(int N, int K, vi U, vi V){
n = N, k = K, u = U, v = V;
res.resize(n); adj.resize(n);
F0R(i, n-1){
adj[u[i]].pb(v[i]);
adj[v[i]).pb(u[i]);
}
dfs(0, -1, 0);
return res;
}
int find_next_station(int s, int t, vi c){
trav(x, c)
if(min(x, s) <= t && max(x, s) >= t)
return x;
return c[0];
}
Compilation message
stations.cpp: In function 'void dfs(int, int, int)':
stations.cpp:36:16: error: 'V' was not declared in this scope
36 | if(!T) res[V] = ++tot;
| ^
stations.cpp: In function 'vi label(int, int, vi, vi)':
stations.cpp:48:17: error: expected ']' before ')' token
48 | adj[v[i]).pb(u[i]);
| ^
| ]
stations.cpp:48:17: error: expected ';' before ')' token
48 | adj[v[i]).pb(u[i]);
| ^
| ;
