/in/foo.cc: In function 'int main()':
/in/foo.cc:16:15: warning: unused variable 'temp' [-Wunused-variable]
  int tail=n-1,temp=1,tempA=0;int l=0,k=0;
               ^~~~
/in/foo.cc:16:22: warning: unused variable 'tempA' [-Wunused-variable]
  int tail=n-1,temp=1,tempA=0;int l=0,k=0;
                      ^~~~~