var i,k,sum:integer; begin k:=20; sum:=0; for i:= k mod 18 to sqr(2) do inc(sum,i); write(sum); readln; end.
var i,k,sum:integer; begin sum:=0; for i:= 2 to 20 do begin if (i>=3) and (i<=8) then inc(sum,i); if sqr(i) > 20 then break; end; write(sum); readln; end.
var c: char; line: string; begin line:='2'; for c:= succ('w') downto pred('t') do if c > 'v' then line:= line + c; write(line); readln; end.
var sum: integer; b:boolean; begin sum:=4; for b:= 2>5 to 5>2 do inc(sum,byte(b)); write(sum); readln; end.
var i: integer; ss,tt:string; begin ss:='krokodil'; tt:=''; for i:=4 to 7 do tt:=tt+copy(ss,i,2); write(tt); readln; end.