Submission #306669

#	Time	Username	Problem	Language	Result	Execution time	Memory
306669		vivaan_gupta	Connecting Supertrees (IOI20_supertrees)	C++14	Compilation error	0 ms	0 KiB

supertrees

#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <ratio>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include <climits>
#include "supertrees.h"
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define in insert
#define vll vector<ll>
#define endl "\n"
#define f first
#define s second
#define pll pair<int,int>
// #define int ll
using namespace std;

 


 
struct DSU
{
	int connected;
	vector<int> par, sz;

	void init(int n) 
	{
		par = sz = vector<int> (n + 1, 0);
		for(int i = 1; i <= n; i++)
			par[i] = i, sz[i] = 1;
		connected = n;
	}

	int getPar(int u)
	{
		while(u != par[u])
		{
			par[u] = par[par[u]];
			u = par[u];
		}
		return u;
	}

	int getSize(int u)
	{
		return sz[getPar(u)];
	}

	void unite(int u, int v)
	{
		int par1 = getPar(u), par2 = getPar(v);

		if(par1 == par2)
			return;

		connected--;

		if(sz[par1] > sz[par2])
			swap(par1, par2);

		sz[par2] += sz[par1];
		sz[par1] = 0;
		par[par1] = par[par2];
	}
};



int construct(std::vector<std::vector<int>> p) {
	DSU g,g2;
	int n = p.size();
	g.init(n-1);
	g2.init(n-1);
	std::vector<std::vector<int>> ans;
	for (int i = 0; i < n; i++) {
		std::vector<int> row;
		row.resize(n);
		ans.push_back(row);
	}
	
	for(int i =0;i<n;i++){
		for(int j =i+1;j<n;j++){
			if(p[i][j] >= 1){
				g.unite(i,j);
			}
			if(p[i][j] == 1){
				g2.unite(i,j);
			}
		}
	}
	map<int,int> col;
	vector<int> wow[n+1];
	int c = 1;
	for(int i =0;i<n;i++){
		int op = g.getPar(i);
		if(col[op] == 0){
			col[op] = c;
			c++;				
		}
		wow[col[op]].pb(i);
	}
	c--;
	for(int i =0;i<n;i++){
		for(int j =0;j<n;j++){
			ans[i][j] = 0;
		}
	}
	for(int i = 1;i<=c;i++){
		if(wow[i].size() == 1) continue;
		set<int> contains;
		bool ok = true;
		for(int j = 0;j<wow[i].size();j++){
			contains.in(wow[i][j]);
			for(int k =j+1;k<wow[i].size();k++){
				if(p[wow[i][j]][wow[i][k]] == 0) return 0;
				for(int l =0;l<wow[i].size();l++){
					// if(l == k || l == j) continue;
					if(p[wow[i][j]][wow[i][k]] == 2 && (p[wow[i][j]][wow[i][l]] == 1 && p[wow[i][l]][wow[i][k]] == 1))
						return 0;
				}
			}
		}
		if(contains.size() == 1 && *(contains.begin() == 2)){
			if(wow[i].size() == 2) return 0;
		}
		col.clear();
		int gg = 1;
		vector<int> chains[n+2];
		for(int j = 0;j<wow[i].size();j++){
			int op = g2.getPar(wow[i][j]);
			if(col[op] == 0){
				col[op] = gg;
				gg++;
			}
			chains[col[op]].pb(wow[i][j]);
		}
		vector<int> v;
		for(int j =1;j<gg;j++){
			
			// if(!poss) return 0;
			for(int k=0;k<chains[j].size()-1;k++){
				ans[chains[j][k]][chains[j][k+1]] = 1;
				ans[chains[j][k+1]][chains[j][k]] = 1;
			}			
			v.pb(chains[j].back());
		}

		for(int i= 0;i<v.size()-1;i++){
			ans[v[i]][v[i+1]] = 1;
			ans[v[i+1]][v[i]] = 1;
		}
		if(v.size() == 1) continue;
		ans[v.back()][v[0]] = 1;
		ans[v[0]][v.back()] = 1;
	}



	

	build(ans);
	return 1;
}


// void solve(){
	
// }
// signed main(){
 
//     ios_base::sync_with_stdio(0);
//     cin.tie(NULL);
//      // freopen(".in","r",stdin);freopen(".out","w",stdout);
    
//      ll tt=1;   
//      // cin >> tt;
//     while(tt--){    
//         solve();
//     }    
// }

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:140:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  140 |   for(int j = 0;j<wow[i].size();j++){
      |                 ~^~~~~~~~~~~~~~
supertrees.cpp:142:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  142 |    for(int k =j+1;k<wow[i].size();k++){
      |                   ~^~~~~~~~~~~~~~
supertrees.cpp:144:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  144 |     for(int l =0;l<wow[i].size();l++){
      |                  ~^~~~~~~~~~~~~~
supertrees.cpp:151:49: error: no match for 'operator==' (operand types are 'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} and 'int')
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                ~~~~~~~~~~~~~~~~ ^~ ~
      |                                              |     |
      |                                              |     int
      |                                              std::set<int>::iterator {aka std::_Rb_tree_const_iterator<int>}
In file included from /usr/include/c++/9/utility:70,
                 from /usr/include/c++/9/algorithm:60,
                 from supertrees.cpp:1:
/usr/include/c++/9/bits/stl_pair.h:448:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator==(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)'
  448 |     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_pair.h:448:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::pair<_T1, _T2>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/algorithm:61,
                 from supertrees.cpp:1:
/usr/include/c++/9/bits/stl_iterator.h:325:5: note: candidate: 'template<class _Iterator> bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)'
  325 |     operator==(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:325:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::reverse_iterator<_Iterator>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/algorithm:61,
                 from supertrees.cpp:1:
/usr/include/c++/9/bits/stl_iterator.h:363:5: note: candidate: 'template<class _IteratorL, class _IteratorR> bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)'
  363 |     operator==(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:363:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::reverse_iterator<_Iterator>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/algorithm:61,
                 from supertrees.cpp:1:
/usr/include/c++/9/bits/stl_iterator.h:1139:5: note: candidate: 'template<class _IteratorL, class _IteratorR> bool std::operator==(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)'
 1139 |     operator==(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:1139:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::move_iterator<_IteratorL>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/bits/stl_algobase.h:67,
                 from /usr/include/c++/9/algorithm:61,
                 from supertrees.cpp:1:
/usr/include/c++/9/bits/stl_iterator.h:1145:5: note: candidate: 'template<class _Iterator> bool std::operator==(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&)'
 1145 |     operator==(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_iterator.h:1145:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::move_iterator<_IteratorL>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/bits/char_traits.h:40,
                 from /usr/include/c++/9/string:40,
                 from /usr/include/c++/9/bitset:47,
                 from supertrees.cpp:2:
/usr/include/c++/9/bits/postypes.h:222:5: note: candidate: 'template<class _StateT> bool std::operator==(const std::fpos<_StateT>&, const std::fpos<_StateT>&)'
  222 |     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/9/bits/postypes.h:222:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::fpos<_StateT>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/string:41,
                 from /usr/include/c++/9/bitset:47,
                 from supertrees.cpp:2:
/usr/include/c++/9/bits/allocator.h:168:5: note: candidate: 'template<class _T1, class _T2> bool std::operator==(const std::allocator<_Tp>&, const std::allocator<_Tp>&)'
  168 |     operator==(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/9/bits/allocator.h:168:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::allocator<_Tp>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/string:55,
                 from /usr/include/c++/9/bitset:47,
                 from supertrees.cpp:2:
/usr/include/c++/9/bits/basic_string.h:6141:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)'
 6141 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/9/bits/basic_string.h:6141:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/string:55,
                 from /usr/include/c++/9/bitset:47,
                 from supertrees.cpp:2:
/usr/include/c++/9/bits/basic_string.h:6149:5: note: candidate: 'template<class _CharT> typename __gnu_cxx::__enable_if<std::__is_char<_Tp>::__value, bool>::__type std::operator==(const std::__cxx11::basic_string<_CharT>&, const std::__cxx11::basic_string<_CharT>&)'
 6149 |     operator==(const basic_string<_CharT>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/9/bits/basic_string.h:6149:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::__cxx11::basic_string<_CharT>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/string:55,
                 from /usr/include/c++/9/bitset:47,
                 from supertrees.cpp:2:
/usr/include/c++/9/bits/basic_string.h:6163:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)'
 6163 |     operator==(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/9/bits/basic_string.h:6163:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   mismatched types 'const _CharT*' and 'std::_Rb_tree_const_iterator<int>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/string:55,
                 from /usr/include/c++/9/bitset:47,
                 from supertrees.cpp:2:
/usr/include/c++/9/bits/basic_string.h:6175:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)'
 6175 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/9/bits/basic_string.h:6175:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/bits/ios_base.h:46,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from supertrees.cpp:5:
/usr/include/c++/9/system_error:292:3: note: candidate: 'bool std::operator==(const std::error_code&, const std::error_code&)'
  292 |   operator==(const error_code& __lhs, const error_code& __rhs) noexcept
      |   ^~~~~~~~
/usr/include/c++/9/system_error:292:32: note:   no known conversion for argument 1 from 'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} to 'const std::error_code&'
  292 |   operator==(const error_code& __lhs, const error_code& __rhs) noexcept
      |              ~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/9/system_error:297:3: note: candidate: 'bool std::operator==(const std::error_code&, const std::error_condition&)'
  297 |   operator==(const error_code& __lhs, const error_condition& __rhs) noexcept
      |   ^~~~~~~~
/usr/include/c++/9/system_error:297:32: note:   no known conversion for argument 1 from 'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} to 'const std::error_code&'
  297 |   operator==(const error_code& __lhs, const error_condition& __rhs) noexcept
      |              ~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/9/system_error:304:3: note: candidate: 'bool std::operator==(const std::error_condition&, const std::error_code&)'
  304 |   operator==(const error_condition& __lhs, const error_code& __rhs) noexcept
      |   ^~~~~~~~
/usr/include/c++/9/system_error:304:37: note:   no known conversion for argument 1 from 'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} to 'const std::error_condition&'
  304 |   operator==(const error_condition& __lhs, const error_code& __rhs) noexcept
      |              ~~~~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/9/system_error:311:3: note: candidate: 'bool std::operator==(const std::error_condition&, const std::error_condition&)'
  311 |   operator==(const error_condition& __lhs,
      |   ^~~~~~~~
/usr/include/c++/9/system_error:311:37: note:   no known conversion for argument 1 from 'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} to 'const std::error_condition&'
  311 |   operator==(const error_condition& __lhs,
      |              ~~~~~~~~~~~~~~~~~~~~~~~^~~~~
In file included from /usr/include/c++/9/bits/locale_facets.h:48,
                 from /usr/include/c++/9/bits/basic_ios.h:37,
                 from /usr/include/c++/9/ios:44,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from supertrees.cpp:5:
/usr/include/c++/9/bits/streambuf_iterator.h:208:5: note: candidate: 'template<class _CharT, class _Traits> bool std::operator==(const std::istreambuf_iterator<_CharT, _Traits>&, const std::istreambuf_iterator<_CharT, _Traits>&)'
  208 |     operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
      |     ^~~~~~~~
/usr/include/c++/9/bits/streambuf_iterator.h:208:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::istreambuf_iterator<_CharT, _Traits>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from supertrees.cpp:5:
/usr/include/c++/9/complex:459:5: note: candidate: 'template<class _Tp> constexpr bool std::operator==(const std::complex<_Tp>&, const std::complex<_Tp>&)'
  459 |     operator==(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:459:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::complex<_Tp>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from supertrees.cpp:5:
/usr/include/c++/9/complex:464:5: note: candidate: 'template<class _Tp> constexpr bool std::operator==(const std::complex<_Tp>&, const _Tp&)'
  464 |     operator==(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:464:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::complex<_Tp>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from supertrees.cpp:5:
/usr/include/c++/9/complex:469:5: note: candidate: 'template<class _Tp> constexpr bool std::operator==(const _Tp&, const std::complex<_Tp>&)'
  469 |     operator==(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/9/complex:469:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   mismatched types 'const std::complex<_Tp>' and 'int'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/deque:67,
                 from supertrees.cpp:10:
/usr/include/c++/9/bits/stl_deque.h:286:5: note: candidate: 'template<class _Tp, class _Ref, class _Ptr> bool std::operator==(const std::_Deque_iterator<_Tp, _Ref, _Ptr>&, const std::_Deque_iterator<_Tp, _Ref, _Ptr>&)'
  286 |     operator==(const _Deque_iterator<_Tp, _Ref, _Ptr>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:286:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::_Deque_iterator<_Tp, _Ref, _Ptr>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/deque:67,
                 from supertrees.cpp:10:
/usr/include/c++/9/bits/stl_deque.h:293:5: note: candidate: 'template<class _Tp, class _RefL, class _PtrL, class _RefR, class _PtrR> bool std::operator==(const std::_Deque_iterator<_Tp, _Ref, _Ptr>&, const std::_Deque_iterator<_Tp, _RefR, _PtrR>&)'
  293 |     operator==(const _Deque_iterator<_Tp, _RefL, _PtrL>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:293:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::_Deque_iterator<_Tp, _Ref, _Ptr>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/deque:67,
                 from supertrees.cpp:10:
/usr/include/c++/9/bits/stl_deque.h:2312:5: note: candidate: 'template<class _Tp, class _Alloc> bool std::operator==(const std::deque<_Tp, _Alloc>&, const std::deque<_Tp, _Alloc>&)'
 2312 |     operator==(const deque<_Tp, _Alloc>& __x,
      |     ^~~~~~~~
/usr/include/c++/9/bits/stl_deque.h:2312:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::deque<_Tp, _Alloc>'
  151 |   if(contains.size() == 1 && *(contains.begin() == 2)){
      |                                                    ^
In file included from /usr/include/c++/9/tuple:39,
                 from /usr/include/c++/9/functional:54,
                 from supertrees.cpp:11:
/usr/include/c++/9/array:252:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> bool std::operator==(const std::array<_Tp, _Nm>&, const std::array<_Tp, _Nm>&)'
  252 |     operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
      |     ^~~~~~~~
/usr/include/c++/9/array:252:5: note:   template argument deduction/substitution failed:
supertrees.cpp:151:52: note:   'std::set<int>::iterator' {aka 'std::_Rb_tree_const_iterator<int>'} is not derived from 'const std::array<_Tp, _Nm>'
  151 |   if(co