/in/foo.cc: In function 'int main()':
/in/foo.cc:12:11: warning: unused variable 'x' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0,mmin=99999999;
           ^
/in/foo.cc:12:13: warning: unused variable 'y' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0,mmin=99999999;
             ^
/in/foo.cc:12:15: warning: unused variable 'k' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0,mmin=99999999;
               ^
/in/foo.cc:12:19: warning: unused variable 'count' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0,mmin=99999999;
                   ^~~~~
/in/foo.cc:12:27: warning: unused variable 'mmin' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0,mmin=99999999;
                           ^~~~