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View Compilation Error

0_0_27616066_32176.cpp: In function 'int main()':
0_0_27616066_32176.cpp:15:8: error: 'cin' was not declared in this scope
  while(cin>>n&&n!=-1)
        ^
0_0_27616066_32176.cpp:15:8: note: suggested alternative:
In file included from 0_0_27616066_32176.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^


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