View Compilation Error

0_0_28684386_19285.cpp:2:1: error: 'uisng' does not name a type
 uisng namespace std;
 ^
0_0_28684386_19285.cpp: In function 'int main()':
0_0_28684386_19285.cpp:19:28: error: 'k' was not declared in this scope
    printf("Case #%d: %d\n",k,(a+b)%10);
                            ^
0_0_28684386_19285.cpp:29:13: error: 'cnt' was not declared in this scope
  cnt1[qi]--;cnt[qj]--;
             ^
0_0_28684386_19285.cpp:36:29: error: 'min' was not declared in this scope
    int p=min(cnt1[i],cnt2[q]);
                             ^
0_0_28684386_19285.cpp:36:29: 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_28684386_19285.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:3444:5: note:   'std::min'
     min(initializer_list<_Tp> __l, _Compare __comp)
     ^