Submission #1024332

#	Time	Username	Problem	Language	Result	Execution time	Memory
1024332		Ahmed_Solyman	Stations (IOI20_stations)	C++14	Compilation error	0 ms	0 KiB

stations

#include <bits/stdc++.h>
using namespace std;
#include "stations.h"
typedef long long ll;

vector<vector<int>>adj;
int mark=0;
vector<int>in;
vector<int> label(int n, int k, vector<int> u, vector<int> v){
    mark=0;
    adj.resize(n);
    in.resize(n);
    for(int i=0;i<n-1;i++){
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
    }
    int mark=0;
    auto dfs=[&](auto &self,int i,int par){
        in[i]=mark++;
        for(auto x:adj[i]){
            if(x!=par)dfs(dfs,x,node);
        }
        return void();
    };
    for(int i=0;i<n;i++){
        if(adj[i].size()==1){
            dfs(i,i);break;
        }
    }
    return in;
}
int find_next_station(int s, int t,vector<int> c){
    int p=0;
    for(auto i:c){
        if(i<=s){
            p=i;continue;
        }
        if(i<=t){
            return i;
        }
    }
    return p;
}

Compilation message (stderr)

stations.cpp: In lambda function:
stations.cpp:21:23: error: use of 'dfs' before deduction of 'auto'
   21 |             if(x!=par)dfs(dfs,x,node);
      |                       ^~~
stations.cpp:21:27: error: use of 'dfs' before deduction of 'auto'
   21 |             if(x!=par)dfs(dfs,x,node);
      |                           ^~~
stations.cpp:21:33: error: 'node' was not declared in this scope
   21 |             if(x!=par)dfs(dfs,x,node);
      |                                 ^~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:27:20: error: no match for call to '(label(int, int, std::vector<int>, std::vector<int>)::<lambda(auto:1&, int, int)>) (int&, int&)'
   27 |             dfs(i,i);break;
      |                    ^
stations.cpp:18:14: note: candidate: 'template<class auto:1> label(int, int, std::vector<int>, std::vector<int>)::<lambda(auto:1&, int, int)>'
   18 |     auto dfs=[&](auto &self,int i,int par){
      |              ^
stations.cpp:18:14: note:   template argument deduction/substitution failed:
stations.cpp:27:20: note:   candidate expects 3 arguments, 2 provided
   27 |             dfs(i,i);break;
      |                    ^