/in/foo.cc: In function 'void out(ll)':
/in/foo.cc:16:20: warning: array subscript has type 'char' [-Wchar-subscripts]
     while(x){z[++ct]=x%10+48,x/=10;}
                    ^
/in/foo.cc:17:27: warning: array subscript has type 'char' [-Wchar-subscripts]
     while(ct){putchar(z[ct]);--ct;}
                           ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:61:13: warning: unused variable 'l' [-Wunused-variable]
         int l=in(),r=in();
             ^
/in/foo.cc:61:20: warning: unused variable 'r' [-Wunused-variable]
         int l=in(),r=in();
                    ^