Language: C++

#include<bits/stdc++.h>
#define endl "\n"
#define pb push_back
#define ll long long
#define d1(x)  cerr << #x << "--> " << x << endl
#define d2(x, y)  cerr << #x << "--> " << x << " | " << #y << "--> " << y <<endl
#define d3(x, y,z)  cerr << #x << "--> " << x << " | " << #y << "--> " << y <<" | " << #z << "--> "<< z<< endl
#define vpll vector<pair<ll,ll>>
#define F first
#define S second
#define T ll tt; cin>>tt; while(tt--)
using namespace std;
ll mode=pow(10,9)+7;
bool cmp(pair<long double ,int > x, pair<long double , int> y){ return x.F<y.F && x.S<y.S; }
const ll maxn=1e4+10;
ll __lcm(ll a, ll b){ return (a*b)/__gcd(a,b); }
int main(){ 
    
//    #ifndef ONLINE_JUDGE
//  		freopen("input.txt", "r", stdin);
//    #endif
    
    ios::sync_with_stdio(0);
    cin.tie(0);
    
	ll n;
	cin>>n;
	map<ll, ll> mp;
	for (int i=0;i<n;i++){
		ll x;
		cin>>x;
		mp[x]++;
	}    
	bool ok=true;
	for (auto i:mp){
		if (i>1){
			ok=false;
			break;
		}
	}
	if (ok) cout<<"YES"<<endl;
	else cout<<"NO"<<endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:36:22: error: no match for 'operator>' (operand types are 'std::pair<const long long int, long long int>' and 'int')
   36 |                 if (i>1){
      |                     ~^~
      |                     | |
      |                     | int
      |                     std::pair<const long long int, long long int>
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181,
                 from a.cc:1:
/usr/include/c++/14/bits/regex.h:1176:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1176 |     operator>(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1176:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/regex.h:1236:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator>(__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const sub_match<_BiIter>&)'
 1236 |     operator>(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1236:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/regex.h:1329:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator>(const sub_match<_BiIter>&, __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1329 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1329:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/regex.h:1403:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1403 |     operator>(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1403:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/regex.h:1497:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1497 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1497:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/regex.h:1573:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1573 |     operator>(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1573:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/regex.h:1673:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator>(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1673 |     operator>(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1673:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   36 |                 if (i>1){
      |                       ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/bits/stl_pair.h:1058:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator>(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1058 |     operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1058:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   36 |                 if (i>1){
      |                       ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:462:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  462 |     operator>(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:462:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/stl_iterator.h:507:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  507 |     operator>(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:507:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1714 |     operator>(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1774 |     operator>(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std::move_iterator<_IteratorL>'
   36 |                 if (i>1){
      |                       ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 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/string_view:695:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  695 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:695:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/string_view:702:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  702 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:702:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/string_view:710:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  710 |     operator> (__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:710:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   36 |                 if (i>1){
      |                       ^
/usr/include/c++/14/bits/basic_string.h:3915:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3915 |     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3915:5: note:   template argument deduction/substitution failed:
a.cc:36:23: note:   'std::pair<const long long int, long long int>' is not derived from 'const std