View Compilation Error

0_0_38352969_12344.cpp: In function 'int main()':
0_0_38352969_12344.cpp:17:22: error: no matching function for call to '__gcd(int&, long long int&)'
    gcd=__gcd(gcd,a[i]);
                      ^
0_0_38352969_12344.cpp:17:22: note: candidate is:
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_38352969_12344.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1229:5: note: template<class _EuclideanRingElement> _EuclideanRingElement std::__gcd(_EuclideanRingElement, _EuclideanRingElement)
     __gcd(_EuclideanRingElement __m, _EuclideanRingElement __n)
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1229:5: note:   template argument deduction/substitution failed:
0_0_38352969_12344.cpp:17:22: note:   deduced conflicting types for parameter '_EuclideanRingElement' ('int' and 'long long int')
    gcd=__gcd(gcd,a[i]);
                      ^