Language: C++

#include <bits/stdc++.h>
using namespace std;
int n,a[100004];
bool ok=true;
int main(){
	cin>>n;
	for(int i=0;i<n;i++)cin>>a[i];
	sort(a,a+n);
	if(n%2==0){
			for(int i=0;i<n-1;i+=2){
				if(a[i]!=i+1||a[i+1]!=i+1){ok=false;break;}
				
			
		}
	}else{
		if(a[0]!=0)ok=false;
		for(int i=1;i<n-1;i+=2){
				if(a[i]!=i+1||a[i]!=i+1){ok=false;break;}
		}
	}
	if(ok){
		int ppap=n/2;
        long long ppap2=pow(a,ppap);
		cout<<ppap2<<endl;
	}else{
		cout<<0<<endl;
	}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:28: error: no matching function for call to 'pow(int [100004], int&)'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
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:549:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::_Pow, std::_Constant, std::_ValArray, _Tp, _Tp>, _Tp> std::pow(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
  549 | _DEFINE_EXPR_BINARY_FUNCTION(pow, struct std::_Pow)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::valarray<_Tp>' and 'int'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::_Pow, std::_ValArray, std::_Constant, _Tp, _Tp>, _Tp> std::pow(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
  549 | _DEFINE_EXPR_BINARY_FUNCTION(pow, struct std::_Pow)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::valarray<_Tp>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::_Pow, std::_ValArray, std::_ValArray, _Tp, _Tp>, _Tp> std::pow(const valarray<_Tp>&, const valarray<_Tp>&)'
  549 | _DEFINE_EXPR_BINARY_FUNCTION(pow, struct std::_Pow)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::valarray<_Tp>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::_Pow, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename _Dom::value_type> std::pow(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  549 | _DEFINE_EXPR_BINARY_FUNCTION(pow, struct std::_Pow)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::_Pow, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename _Dom::value_type> std::pow(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  549 | _DEFINE_EXPR_BINARY_FUNCTION(pow, struct std::_Pow)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::_Pow, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename _Dom::value_type> std::pow(const valarray<typename _Dom::valarray>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  549 | _DEFINE_EXPR_BINARY_FUNCTION(pow, struct std::_Pow)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::_Pow, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename _Dom::value_type> std::pow(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  549 | _DEFINE_EXPR_BINARY_FUNCTION(pow, struct std::_Pow)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::_Pow, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename _Dom1::value_type> std::pow(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  549 | _DEFINE_EXPR_BINARY_FUNCTION(pow, struct std::_Pow)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:549:1: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
In file included from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/complex:2482:5: note: candidate: 'template<class _Tp, class _Up> std::complex<typename __gnu_cxx::__promote<decltype (((typename __gnu_cxx::__promote<_Tp, std::__is_integer<_Tp>::__value>::__type)(0) + (typename __gnu_cxx::__promote<_Up, std::__is_integer<_Up>::__value>::__type)(0)))>::__type> std::pow(const complex<_Tp>&, const complex<_Up>&)'
 2482 |     pow(const std::complex<_Tp>& __x, const std::complex<_Up>& __y)
      |     ^~~
/usr/include/c++/14/complex:2482:5: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::complex<_Tp>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/complex:2474:5: note: candidate: 'template<class _Tp, class _Up> std::complex<typename __gnu_cxx::__promote<decltype (((typename __gnu_cxx::__promote<_Tp, std::__is_integer<_Tp>::__value>::__type)(0) + (typename __gnu_cxx::__promote<_Up, std::__is_integer<_Up>::__value>::__type)(0)))>::__type> std::pow(const _Tp&, const complex<_Up>&)'
 2474 |     pow(const _Tp& __x, const std::complex<_Up>& __y)
      |     ^~~
/usr/include/c++/14/complex:2474:5: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::complex<_Up>' and 'int'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/complex:2466:5: note: candidate: 'template<class _Tp, class _Up> std::complex<typename __gnu_cxx::__promote<decltype (((typename __gnu_cxx::__promote<_Tp, std::__is_integer<_Tp>::__value>::__type)(0) + (typename __gnu_cxx::__promote<_Up, std::__is_integer<_Up>::__value>::__type)(0)))>::__type> std::pow(const complex<_Tp>&, const _Up&)'
 2466 |     pow(const std::complex<_Tp>& __x, const _Up& __y)
      |     ^~~
/usr/include/c++/14/complex:2466:5: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::complex<_Tp>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/complex:1339:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::pow(const _Tp&, const complex<_Tp>&)'
 1339 |     pow(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~
/usr/include/c++/14/complex:1339:5: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::complex<_Tp>' and 'int'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/complex:1328:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::pow(const complex<_Tp>&, const complex<_Tp>&)'
 1328 |     pow(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~
/usr/include/c++/14/complex:1328:5: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::complex<_Tp>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/complex:1294:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::pow(const complex<_Tp>&, const _Tp&)'
 1294 |     pow(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~
/usr/include/c++/14/complex:1294:5: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::complex<_Tp>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
/usr/include/c++/14/complex:1285:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::pow(const complex<_Tp>&, int)'
 1285 |     pow(const complex<_Tp>& __z, int __n)
      |     ^~~
/usr/include/c++/14/complex:1285:5: note:   template argument deduction/substitution failed:
a.cc:23:28: note:   mismatched types 'const std::complex<_Tp>' and 'int [100004]'
   23 |         long long ppap2=pow(a,ppap);
      |                         ~~~^~~~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:114:
/usr/include/c++/14/cmath:1074:5: note: candidate: 'template<class _Tp, class _Up> constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type std::pow(_Tp, _Up)'
 1074 |     pow(_Tp __x, _Up __y)
      |     ^