/in/foo.c: In function 'main':
/in/foo.c:24:24: warning: variable 'count2' set but not used [-Wunused-but-set-variable]
     int n1,n2,count1=0,count2=0;
                        ^~~~~~
/in/foo.c:24:15: warning: variable 'count1' set but not used [-Wunused-but-set-variable]
     int n1,n2,count1=0,count2=0;
               ^~~~~~