0_0_12942904_26718.cpp: In function `int main()':
0_0_12942904_26718.cpp:6: error: no match for 'operator==' in '(&std::cin)->std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((double&)(&n))) == 1'
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