Expression 2: "R" Subscript, "e" "m" "o" "v" "e" , Baseline left parenthesis, "P" , right parenthesis equals "p" to "p" left bracket, distance left parenthesis, left parenthesis, ceil left parenthesis, "P" . "x" , right parenthesis , ceil left parenthesis, "P" . "y" , right parenthesis , right parenthesis , "p" , right parenthesis greater than 0 , right bracketRemoveP=p→pdistanceceilP.x,ceilP.y,p>0
