#include "citymapping.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 1e4+5;
vector<int> adj[N];
int v[N], r[N], w[N];
vector<pair<long long int, int>> dis(N, {1e18+7, 0});
int pos = 0;
void un(int a, int b, int dis){
adj[a].push_back(b);
// adj[b].push_back(a);
v[pos]=a;
r[pos]=b;
w[pos]=dis;
pos++;
}
void dfs(int u, int p, int pos, long long int pd){
int st = dis[pos].second, dd = dis[pos].first;
if(adj[u].size() == 0){
un(u, st, pd);
return;
}
if(adj[u].size() == 1){
int x = adj[u][0];
long long int d = get_distance(x, st);
if(d < pd) dfs(x, u, pos, d);
else{
un(u, st, pd);
return;
}
}
if(adj[u].size() == 2){
int x = adj[u][0];
long long int d = get_distance(x, st);
if(d < pd) dfs(x, u, pos, d);
else{
long long int r = get_distance(adj[u][1], st);
dfs(adj[u][1], u, pos, r);
}
}
}
void find_roads(int N, int Q, int A[], int B[], int W[]) {
for(int i = n-1; i < N; i++) dis[i].first = 1e18+7;
// vector<pair<long long int, int>> dis (n-1);
for(int i = 0; i < n-1; i++){
long long int d = get_distance(1, i+2);
dis[i]={d, i+2};
}
sort(dis.begin(), dis.end());
un(1, dis[0].second, dis[0].first);
for(int i = 1; i < n-1; i++){
dfs(1, -1, i, dis[i].first);
}
// for(int i = 0; i < n-1; i++){
// cout << v[i] << " " << r[i] << " " << w[i] << endl;
// }
int aa[n-1], bb[n-1], cc[n-1];
// for(int i = 0; i < n-1; i++){
// aa[i] = v[i];
// bb[i] = r[i];
// cc[i] = w[i];
// // cout << v[i] << " " << r[i] << " " << w[i] << endl;
// }
// A = aa;
// B = bb;
// W = cc;
for (int i = 0; i < N - 1; i++) {
A[i] = v[i];
B[i] = r[i];
W[i] = w[i];
}
return;
}
Compilation message
citymapping.cpp: In function 'void dfs(int, int, int, long long int)':
citymapping.cpp:24:31: warning: unused variable 'dd' [-Wunused-variable]
24 | int st = dis[pos].second, dd = dis[pos].first;
| ^~
citymapping.cpp: In function 'void find_roads(int, int, int*, int*, int*)':
citymapping.cpp:57:14: error: 'n' was not declared in this scope
57 | for(int i = n-1; i < N; i++) dis[i].first = 1e18+7;
| ^
citymapping.cpp:59:24: error: 'n' was not declared in this scope
59 | for(int i = 0; i < n-1; i++){
| ^
citymapping.cpp:68:24: error: 'n' was not declared in this scope
68 | for(int i = 1; i < n-1; i++){
| ^
citymapping.cpp:75:12: error: 'n' was not declared in this scope
75 | int aa[n-1], bb[n-1], cc[n-1];
| ^
