Submission #828243

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
828243	2023-08-17 07:08:55	jlallas384	Parachute rings (IOI12_rings)	C++17	Compilation error	0 ms	0 KiB

rings

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#include <bits/stdc++.h>
using namespace std;
 
 
 
struct ufds{
    vector<int> sz, par;
    ufds(){}
    ufds(int n): sz(n, 1), par(n){
        iota(par.begin(), par.end(), 0);
    }
    int find(int a){
        return par[a] == a ? a : par[a] = find(par[a]);
    }
    int unite(int a, int b){
        a = find(a), b = find(b);
        if(a == b) return 0;
        if(sz[a] < sz[b]) swap(a, b);
        par[b] = a;
        sz[a] += sz[b];
        return 1;
    }
};
 
set<int> ans;
vector<vector<int>> g, tree;
vector<int> deg;
int n = 0;
ufds ds;
 
 
 
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Compilation message (stderr)

rings.cpp: In function 'void Link(int, int)':
rings.cpp:135:39: error: invalid use of member function 'std::set<_Key, _Compare, _Alloc>::iterator std::set<_Key, _Compare, _Alloc>::begin() const [with _Key = int; _Compare = std::less<int>; _Alloc = std::allocator<int>; std::set<_Key, _Compare, _Alloc>::iterator = std::_Rb_tree<int, int, std::_Identity<int>, std::less<int>, std::allocator<int> >::const_iterator]' (did you forget the '()' ?)
  135 |                     for(int x: g[*ans.begin]){
      |                                   ~~~~^~~~~
      |                                            ()