View Compilation Error

0_0_34907555_28260.cpp: In function 'int main()':
0_0_34907555_28260.cpp:13:5: error: 'cin' was not declared in this scope
     cin >> T;
     ^
0_0_34907555_28260.cpp:13:5: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:74:0,
                 from 0_0_34907555_28260.cpp:8:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^
0_0_34907555_28260.cpp:17:6: error: 'cout' was not declared in this scope
      cout << "Case #" << i << ": " << n-1 << '\n';
      ^
0_0_34907555_28260.cpp:17:6: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:74:0,
                 from 0_0_34907555_28260.cpp:8:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^