Run id: 147133

Main.cc: In function 'int main()':
Main.cc:6:10: error: 'f' was not declared in this scope
     cin>>f;
          ^
Main.cc:5:9: warning: unused variable 'm' [-Wunused-variable]
   int n,m,r=0,a;
         ^
Main.cc:5:15: warning: unused variable 'a' [-Wunused-variable]
   int n,m,r=0,a;
               ^