#include "factories.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
struct E{ int x, d; };
const ll inf = 1e18;
int n, c[500010], s[500010], p[500010], d[500010], bc[500010];
ll md[19][500010], bd[500010];
vector<E> e[500010];
int sf(int x, int p){
s[x] = 1;
for(auto &i : e[x]) if(!c[i.x] && i.x != p) s[x] += sf(i.x, x);
return s[x];
}
int cf(int x, int p, int t){
for(auto &i : e[x])
if(!c[i.x] && i.x != p && s[i.x] > t / 2) return cf(i.x, x, t);
return x;
}
void g(int x, int p, int d, ll v){
md[d][x] = v;
for(auto &i : e[x]) if(!c[i.x] && i.x != p) g(i.x, x, d, v + i.d);
}
int f(int x, int de){
x = cf(x, 0, sf(x, 0));
d[x] = de;
c[x] = 1;
for(auto &i : e[x]){
if(c[i.x]) continue;
g(i.x, x, de, i.d);
p[f(i.x, de + 1)] = x;
}
return x;
}
ll upd(int x, int g){
ll ret = inf;
for(int t = x, u = d[x]; t; t = p[t], u--){
if(!g && (bc[t] != q || bd[t] > md[u][x])){
bd[t] = md[u][x];
bc[t] = q;
}
else if(g && bc[t] == q){
ret = min(ret, bd[t] + md[u][x]);
}
}
return ret;
}
void Init(int N, int A[], int B[], int D[]){
n = N;
for(int i = 0, x, y, z; i < n - 1; i++){
x = A[i] + 1; y = B[i] + 1; z = D[i];
e[x].push_back({y, z});
e[y].push_back({x, z});
}
f(1, 0);
}
ll Query(int S, int X[], int T, int Y[]){
for(int i = 0; i < S; i++) upd(X[i] + 1, 0);
ll ret = inf;
for(int i = 0; i < T; i++) ret = min(ret, upd(Y[i] + 1, 1));
return ret;
}
Compilation message
factories.cpp: In function 'll upd(int, int)':
factories.cpp:45:22: error: 'q' was not declared in this scope
if(!g && (bc[t] != q || bd[t] > md[u][x])){
^
