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View Compilation Error

0_0_39330928_4550.cpp:2:7: error: expected nested-name-specifier before 'namesapce'
    2 | using namesapce std;
      |       ^~~~~~~~~
0_0_39330928_4550.cpp: In function 'int main()':
0_0_39330928_4550.cpp:6:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 | cin>>n;
      | ^~~
      | std::cin
In file included from 0_0_39330928_4550.cpp:1:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
0_0_39330928_4550.cpp:11:1: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   11 | cout<<a+b<<endl;
      | ^~~~
      | std::cout
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_39330928_4550.cpp:11:12: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   11 | cout<<a+b<<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)
      |     ^~~~


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