View Compilation Error

0_0_30222070_22226.cpp: In function 'int main()':
0_0_30222070_22226.cpp:18:14: error: 'k' was not declared in this scope
         cin>>k>>m;
              ^
0_0_30222070_22226.cpp:36:15: error: expected primary-expression before ')' token
         if(!f)) cout<<-1<<endl;
               ^