Language: C++

#include <bits/stdc++.h>
#include<assert.h>
using namespace std;
typedef long long ll;
const ll inf = 1e18;
#define rep(i, a, b) for (int i = a; i < b; i++)
#define per(i, a, b) for (int i = b - 1; i >= a; i--)
#define int ll
using pint = pair<int, int>;
int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};

int gcd(int a, int b) { return b ? gcd(b, a % b) : a; }

signed main() {
    int n;
    cin >> n;
    int a[n];
    rep(i, 0, n) cin >> a[i];
    bool p = 1, s = 1;

    set<int> st;
    rep(i, 0, n) {
        int q = a[i];
        for (int j = 2; j * j <= q; j++) {
            if (q % j == 0) {
                if (*st.find(j) == j) {
                    p = 0;
                    break;
                }
                st.insert(j);
                while (q % j == 0) {
                    q /= j;
                }
            }
        }
        assert(q>=1);
        if (q != 1) {
            if (*st.find(q) != st.end()) p = 0;
        }
        st.insert(q);
        if (!p) break;
    }

    // for (auto p : st) cout << p << " ";

    int now = a[0];
    rep(i, 0, n) { now = gcd(now, a[i]); }
    if (now != 1) s = 0;

    if (p) {
        cout << "pairwise coprime\n";
    } else if (s) {
        cout << "setwise coprime\n";
    } else {
        cout << "not coprime\n";
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:38:29: error: no match for 'operator!=' (operand types are 'const long long int' and 'std::set<long long int>::iterator' {aka 'std::_Rb_tree<long long int, long long int, std::_Identity<long long int>, std::less<long long int>, std::allocator<long long int> >::const_iterator'})
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                 ~~~~~~~~~~~ ^~ ~~~~~~~~
      |                 |                    |
      |                 const long long int  std::set<long long int>::iterator {aka std::_Rb_tree<long long int, long long int, std::_Identity<long long int>, std::less<long long int>, std::allocator<long long int> >::const_iterator}
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:1132:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator!=(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1132 |     operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1132:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/regex.h:1212:5: 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>&)'
 1212 |     operator!=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1212:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/regex.h:1305:5: 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>&)'
 1305 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1305:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/regex.h:1379:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1379 |     operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1379:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   'std::set<long long int>::iterator' {aka 'std::_Rb_tree<long long int, long long int, std::_Identity<long long int>, std::less<long long int>, std::allocator<long long int> >::const_iterator'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/regex.h:1473:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1473 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1473:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/regex.h:1547:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1547 |     operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1547:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   'std::set<long long int>::iterator' {aka 'std::_Rb_tree<long long int, long long int, std::_Identity<long long int>, std::less<long long int>, std::allocator<long long int> >::const_iterator'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/regex.h:1647:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1647 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1647:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/regex.h:2213:5: note: candidate: 'template<class _Bi_iter, class _Alloc> bool std::__cxx11::operator!=(const match_results<_BiIter, _Alloc>&, const match_results<_BiIter, _Alloc>&)'
 2213 |     operator!=(const match_results<_Bi_iter, _Alloc>& __m1,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:2213:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::__cxx11::match_results<_BiIter, _Alloc>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
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:1052:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator!=(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1052 |     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1052:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::pair<_T1, _T2>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:455:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  455 |     operator!=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:455:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/stl_iterator.h:500:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  500 |     operator!=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:500:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1686 |     operator!=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1753 |     operator!=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
In file included from /usr/include/c++/14/bits/char_traits.h:42,
                 from /usr/include/c++/14/string:42,
                 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/postypes.h:197:5: note: candidate: 'template<class _StateT> bool std::operator!=(const fpos<_StateT>&, const fpos<_StateT>&)'
  197 |     operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:197:5: note:   template argument deduction/substitution failed:
a.cc:38:39: note:   mismatched types 'const std::fpos<_StateT>' and 'const long long int'
   38 |             if (*st.find(q) != st.end()) p = 0;
      |                                       ^
In file included from /usr/include/c++/14/string:43:
/usr/include/c++/14/bits/allocator.h:243:5: note: candidate: 'template<class _T1, class _T2> bool st