Language: C++

#include<bits/stdc++.h>
using namespace std;
int n;
double a[202020];
long long div2[222],div5[222],xs[111],ans,ct[11],zs,zs0,ky,al;
map<pair<int,int>,int>mp;
map<pair<pair<int,int>,int>,int>mp1;
int main()
{
	cin>>n;
	for(int i=0;i<n;i++)
	{
		cin>>a[i];
		if(a[i]==floor(a[i]))
		{
			zs++;
			int ff=a[i];
			int dd2=0,dd5=0;
			while(ff%2==0)
			{
				ff/=2;
				dd2++;
			}
			while(ff%5==0)
			{
				ff/=5;
				dd5++;
			}
			mp[make_pair(dd2,dd5)]++;
		}
	}
	ans+=zs*(zs-1)/2;
	for(int i=0;i<n;i++)
	{
		if(a[i]!=floor(a[i]))
		{
			double ff=a[i];
			int xx=0;
			while(ff!=floor(ff))
			{
				ff*=10;
				xx++;
			}
			long long fff=ff;
			int dd2=0,dd5=0;
			while(fff%2==0)
			{
				fff/=2;
				dd2++;
			}
			while(fff%5==0)
			{
				fff/=5;
				dd5++;
			}
			mp1[make_pair(make_pair(dd2,dd5),xx)]++;
			for(map<pair<int,int>,int>::iterator it=mp.begin();it!=mp.end();it++)
			{
				int xxx=it->first.first,yyy=it->first.second;
				if(min(xxx+dd2,yyy+dd5)>=xx)
				{
					ans+=it->second;
				}
			}
		}
	}
	long long sm=0;
	for(map<pair<pair<int,int>,int>,int>::iterator it=mp1.begin();it!=mp1.end();it++)
	{
		for(map<pair<pair<int,int>,int>,int>::iterator it1=mp1.begin();it1!=mp1.end();it1++)
		{
			if(it->first==it1->first);
			else
			{
				if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
				{
					sm+=it->second*it1->second;
				}
			}
		}
	}
	sm/=2;
	ans+=sm;
	cout<<ans<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:75:61: error: no match for 'operator+' (operand types are 'const int' and 'const std::pair<int, int>')
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                        ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
      |                                                        |                |
      |                                                        const int        const std::pair<int, int>
In file included from /usr/include/c++/14/bits/stl_algobase.h:67,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:627:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_Iterator> std::operator+(typename reverse_iterator<_Iterator>::difference_type, const reverse_iterator<_Iterator>&)'
  627 |     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:627:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   'const std::pair<int, int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename move_iterator<_IteratorL>::difference_type, const move_iterator<_IteratorL>&)'
 1798 |     operator+(typename move_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   'const std::pair<int, int>' is not derived from 'const std::move_iterator<_IteratorL>'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/basic_string.h:3598:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3598 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3598:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const int'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3616 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   mismatched types 'const _CharT*' and 'int'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3635 |     operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   'const std::pair<int, int>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3652 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const int'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, _CharT)'
 3670 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const int'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3682 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const int'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3689 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const int'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3696 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'const int'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3719 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note:   template argument deduction/substitution failed:
a.cc:75:73: note:   mismatched types 'const _CharT*' and 'int'
   75 |                                 if(min(it->first.first.first+it1->first.first,it->first.first.second+it1->first.first.second)>=it->first.second+it1->first.second)
      |                                                                         ^~~~~
/usr/include/c++/14/bits/basic_string.h:3726:5: note: candidate: 'template<class _CharT, class _Tra