foo.cc: In function 'int main()':
foo.cc:55:23: error: no matching function for call to '__gcd(long long int&, int)'
   g=__gcd(ans1,m*n-i+1);
                       ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from foo.cc:1:
/usr/include/c++/7/bits/stl_algo.h:1232:5: note: candidate: template<class _EuclideanRingElement> _EuclideanRingElement std::__gcd(_EuclideanRingElement, _EuclideanRingElement)
     __gcd(_EuclideanRingElement __m, _EuclideanRingElement __n)
     ^~~~~
/usr/include/c++/7/bits/stl_algo.h:1232:5: note:   template argument deduction/substitution failed:
foo.cc:55:23: note:   deduced conflicting types for parameter '_EuclideanRingElement' ('long long int' and 'int')
   g=__gcd(ans1,m*n-i+1);
                       ^

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