Submission #398255

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
3982552021-05-04 02:33:37EveruleStations (IOI20_stations)C++17
76 / 100
1142 ms984 KiB
#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
std::vector<int> labels(n);
vector<vector<int>> adj(n);
for(int i=0;i<n-1;i++){
adj[u[i]].push_back(v[i]);
adj[v[i]].push_back(u[i]);
}
vector<int> tin(n), tout(n), dep(n);
int t = 0;
function<void(int,int)> dfs = [&](int u,int p){
tin[u] = t++;
for(auto &v : adj[u]){
if(v == p) continue;
dep[v] = dep[u] + 1;
dfs(v, u);
}
tout[u] = t++;
};
dfs(0, 0);
for(int i=0;i<n;i++){
if(dep[i] % 2 == 0){
labels[i] = tin[i];
}
else{
labels[i] = tout[i];
}
}
 
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Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:54:1: warning: control reaches end of non-void function [-Wreturn-type]
   54 | }
      | ^
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