Submission #961435

#	Time	Username	Problem	Language	Result	Execution time	Memory
961435		zeta7532	Road Closures (APIO21_roads)	C++17	Compilation error	0 ms	0 KiB

roads

#include "roads.h"
#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using namespace std;
using ll = long long;
const ll mod = 998244353;
const ll INF = 1LL<<60;
#define fi first
#define se second
#define rep(i,n) for(ll i=0;i<n;i++)
#define all(x) x.begin(),x.end()
#define faster ios::sync_with_stdio(false);cin.tie(nullptr)

#include <vector>

std::vector<long long> minimum_closure_costs(int N, std::vector<int> U,
                                             std::vector<int> V,
                                             std::vector<int> W) {
  vector<vector<ll>> dp(N,vector<ll>(N+1,0));
  vector<vector<pair<ll,ll>>> G(N);
  rep(i,N-1){
    U[i]--,V[i]--;
    G[U[i]].push_back({V[i],W[i]});
    G[V[i]].push_back({U[i],W[i]});
  }
  vector<ll> ans(N,0);
  rep(deg,N){
    function<void(ll)> dfs=[&](ll v,ll par){
      for(auto e:G[v]){
        dfs(e.fi,v);

      }
    }
  }
  return ans;
}

Compilation message (stderr)

roads.cpp: In lambda function:
roads.cpp:32:19: error: no match for call to '(std::function<void(long long int)>) (long long int&, ll&)'
   32 |         dfs(e.fi,v);
      |                   ^
In file included from /usr/include/c++/10/functional:59,
                 from /usr/include/c++/10/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from roads.cpp:2:
/usr/include/c++/10/bits/std_function.h:617:5: note: candidate: '_Res std::function<_Res(_ArgTypes ...)>::operator()(_ArgTypes ...) const [with _Res = void; _ArgTypes = {long long int}]'
  617 |     function<_Res(_ArgTypes...)>::
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/std_function.h:617:5: note:   candidate expects 1 argument, 2 provided
roads.cpp: In function 'std::vector<long long int> minimum_closure_costs(int, std::vector<int>, std::vector<int>, std::vector<int>)':
roads.cpp:35:5: error: conversion from 'minimum_closure_costs(int, std::vector<int>, std::vector<int>, std::vector<int>)::<lambda(ll, ll)>' to non-scalar type 'std::function<void(long long int)>' requested
   35 |     }
      |     ^