/in/foo.cc:4:1: error: 'uisng' does not name a type
 uisng namespace std;
 ^~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:23:25: error: 'min' was not declared in this scope
   for(int j=2;j<=min(m,i);j++)
                         ^
/in/foo.cc:23:25: note: suggested alternative:
In file included from /usr/include/c++/6/algorithm:62:0,
                 from /in/foo.cc:3:
/usr/include/c++/6/bits/stl_algo.h:3453:5: note:   'std::min'
     min(initializer_list<_Tp> __l, _Compare __comp)
     ^~~