View Compilation Error

0_0_36599762_11462.cpp: In function 'int main()':
0_0_36599762_11462.cpp:6:48: error: '__gcd' was not declared in this scope
         puts(__builtin_popcount((a+b)/__gcd(a,b))==1?"Yes":"No");
                                                ^
0_0_36599762_11462.cpp:6:48: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:64,
                 from 0_0_36599762_11462.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1229:5: note:   'std::__gcd'
     __gcd(_EuclideanRingElement __m, _EuclideanRingElement __n)
     ^