Language: C++

#include<bits/stdc++.h>
#define sz(a) int((a).size())
#define pb push_back
#define all(c) (c).begin(),(c).end()
#define tr(c,i) for(typeof((c).begin() i = (c).begin(); i != (c).end(); i++)
#define present(c,x) ((c).find(x) != (c).end())
#define cpresent(c,x) (find(all(c),x) != (c).end())
#define LSOne(i) (i&(-i))
#define rep(i,a,b) for(int(i)=(a);(i)<(b);i++)
#define rrep(i,a,b) for(int(i)=(a);(i)>(b);i--)
#define BUG(x) {cout<<#x<<" = "<<x<<endl;}
#define left(x) (x<<1)
#define right(x) ((x<<1) +1)
#define middle(s,e)(s+(e-s)/2)
#define size_tree(n) 2*(int)pow(2,ceil(log2(n)))
#define CL(A,I) (memset(A,I,sizeof(A)))
#define endl '\n'
#define PHAS(_n) (pbits[(_n)>>5] & (1u << ((_n) & 0x1f)))
#define PSET(_n) (pbits[(_n)>>5] |= (1u << ((_n) & 0x1f)))
//unsigned int pbits[200000000/32+1];

static const int INF = 0x3f3f3f3f;
static const long long INFL = 0x3f3f3f3f3f3f3f3fLL;
static const long double epsilon = 1e-15;
static const long double pi = acos((long double) -1);
using namespace std;
inline void init_io(){ios_base::sync_with_stdio(false);cin.tie(NULL);}

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> ii;
typedef long long ll;
const int MAX_N = 100001;

/*
struct data{
  string s;
  int p,i;
  data():s(""), p(0), i(0){};
  data(string s_, int p_, int i_) : s(s_),p(p_), i(i_){};
  bool operator < (data other) const {
	if(s==other.s)
		return p>other.p;
    return s < other.s;
  }
};
*/

int st[MAX_N];
int arr[10*MAX_N];
int L[10*MAX_N],R[10*MAX_N];

int main()
{
        init_io();
        ll n;
        cin>>n;
        cout<((n-2)*180)<<endl;
        return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:58:13: error: no match for 'operator<' (operand types are 'std::ostream' {aka 'std::basic_ostream<char>'} and 'll' {aka 'long long int'})
   58 |         cout<((n-2)*180)<<endl;
      |         ~~~~^
      |         |
      |         std::ostream {aka std::basic_ostream<char>}
a.cc:58:13: note: candidate: 'operator<(int, ll {aka long long int})' (built-in)
   58 |         cout<((n-2)*180)<<endl;
      |             ^
a.cc:58:13: note:   no known conversion for argument 1 from 'std::ostream' {aka 'std::basic_ostream<char>'} to '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:1143:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator<(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1143 |     operator<(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1143:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/regex.h:1224:5: 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>&)'
 1224 |     operator<(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1224:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/regex.h:1317:5: 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>&)'
 1317 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1317:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/regex.h:1391:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1391 |     operator<(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1391:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'll' {aka 'long long int'}
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/regex.h:1485:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1485 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1485:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/regex.h:1560:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1560 |     operator<(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1560:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'll' {aka 'long long int'}
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/regex.h:1660:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator<(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1660 |     operator<(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1660:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
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:1045:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator<(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1045 |     operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1045:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::pair<_T1, _T2>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:448:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  448 |     operator<(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:448:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/stl_iterator.h:493:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  493 |     operator<(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:493:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/stl_iterator.h:1694:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1694 |     operator<(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1694:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
/usr/include/c++/14/bits/stl_iterator.h:1760:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1760 |     operator<(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1760:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |                           ^~~~
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:673:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator<(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  673 |     operator< (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:673:5: note:   template argument deduction/substitution failed:
a.cc:17:14: note:   'std::basic_ostream<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   17 | #define endl '\n'
      |              ^~~~
a.cc:58:27: note: in expansion of macro 'endl'
   58 |         cout<((n-2)*180)<<endl;
      |