This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "stations.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
int mn = 1;
map<int,bool> mp;
int dfs(int node, int p, vector<vector<int>> &g, vector<int> &sub_tree){
for(auto &x: g[node]){
if(x == p) continue;
sub_tree[node]+=dfs(x,node,g,sub_tree);
}
return sub_tree[node]=sub_tree[node]+1;
}
void calc_labels(int node, int p, int t, vector<vector<int>> &g, vector<int> &sub_tree, vector<int> &labels){
if(t){
mp[mn+sub_tree[node]-1] = 1;
labels[node] = mn+sub_tree[node]-1;
}
else{
while(mp[mn]) mn++;
mp[mn] = 1;
labels[node] = mn; while(mp[mn]) mn++;
}
for(auto &x: g[node]){
if(x == p) continue;
int turno = t^1;
calc_labels(x,node,turno,g,sub_tree,labels);
}
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
vector<int> sub_tree(n,0);
vector<vector<int>> g(n);
vector<int> labels(n);
for(int i = 0; i<n-1; i++){
g[u[i]].pb(v[i]);
g[v[i]].pb(u[i]);
}
dfs(0,-1,g,sub_tree);
calc_labels(0,-1,1,g,sub_tree,labels);
return labels;
}
int find_next_station(int s, int t, std::vector<int> c) {
if(c[0]>s){
int l = s;
for(int i = 0; i<c.size()-1; i++){
if(t>=l and t<=c[i]){
return c[i];
}
else l = c[i]+1;
}
return c.back();
}
else{
int r = s;
for(int i = c.size()-1; i; i--){
if(t>=c[i] and t<=r) return c[i];
else r = c[i]-1;
}
return c[0];
}
}
Compilation message (stderr)
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:67:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
67 | for(int i = 0; i<c.size()-1; i++){
| ~^~~~~~~~~~~
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