function max(a, b, c: integer): integer;
begin
if (a > b) and (a > c) then
max := a
else if (b > a) and (b > c) then
max := b
else
max := c;
end;
var
a, b, c, k, l, m, n: integer;
begin
a := 10;
b := 20;
c := 50;
k := max(a, b, c);
writeln('max 1 gruppy=', k);
a := 100;
b := 200;
c := 75;
l := max(a, b, c);
writeln('max 2 gruppy=', l);
writeln('vvedite chisla a,b,c');
read(a, b, c);
m := max(a, b, c);
writeln('max 3 gruppy=', m);
n := max(k, l, m);
writeln('max vseh grupp=', n);
readln;
readln;
end.