Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
using ll = long long;
int main(){
    int n;
    cin>>n;
    vector<int> l(n);
    rep(i,n) cin >> l[i];
    int cnt=0;
    rep(i,n){
        rep(j,n){
            rep(k,n){
                if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
            }
        }
    }
    cout << cnt <<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:49: error: 'l' is not a type
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                 ^
a.cc:14:53: error: expected '>' before '+' token
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                     ^
a.cc: In lambda function:
a.cc:14:94: error: expected '{' before ')' token
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^
a.cc: In function 'int main()':
a.cc:14:42: error: no match for 'operator&&' (operand types are 'bool' and 'main()::<lambda()>')
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                     ~~~~~~~~~~~~~~~~~~~~ ^~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                  |          |
      |                                  bool       main()::<lambda()>
a.cc:14:42: note: candidate: 'operator&&(bool, bool)' (built-in)
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                     ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:14:42: note:   no known conversion for argument 2 from 'main()::<lambda()>' to 'bool'
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166,
                 from a.cc:1:
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:14:94: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:14:94: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:14:94: note:   'main()::<lambda()>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:14:94: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:14:94: note:   'main()::<lambda()>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^
/usr/include/c++/14/valarray:1206:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__logical_and, _Tp>::result_type> std::operator&&(const valarray<_Tp>&, const valarray<_Tp>&)'
 1206 | _DEFINE_BINARY_OPERATOR(&&, __logical_and)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1206:1: note:   template argument deduction/substitution failed:
a.cc:14:94: note:   mismatched types 'const std::valarray<_Tp>' and 'bool'
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^
/usr/include/c++/14/valarray:1206:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__logical_and, _Tp>::result_type> std::operator&&(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
 1206 | _DEFINE_BINARY_OPERATOR(&&, __logical_and)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1206:1: note:   template argument deduction/substitution failed:
a.cc:14:94: note:   mismatched types 'const std::valarray<_Tp>' and 'bool'
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^
/usr/include/c++/14/valarray:1206:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__logical_and, _Tp>::result_type> std::operator&&(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
 1206 | _DEFINE_BINARY_OPERATOR(&&, __logical_and)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1206:1: note:   template argument deduction/substitution failed:
a.cc:14:94: note:   'main()::<lambda()>' is not derived from 'const std::valarray<_Tp>'
   14 |                 if (i!=j && j!=k && i!=k && [i]<l[j]+l[k] && l[j]<l[i]+l[k] && l[k]<l[i]+l[j]) cnt++;
      |                                                                                              ^