View Compilation Error

0_0_39253279_4429.cpp: In function 'int main()':
0_0_39253279_4429.cpp:9:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    9 |         cout<<pow(3,m-1)+1<<endl;
      |         ^~~~
      |         std::cout
In file included from 0_0_39253279_4429.cpp:3:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
0_0_39253279_4429.cpp:9:21: error: 'm' was not declared in this scope
    9 |         cout<<pow(3,m-1)+1<<endl;
      |                     ^
0_0_39253279_4429.cpp:9:29: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    9 |         cout<<pow(3,m-1)+1<<endl;
      |                             ^~~~
      |                             std::endl
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:41:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ostream:735:5: note: 'std::endl' declared here
  735 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~