var a,b,c,d:longint;
function max(a,b:longint):longint;
begin
if a>b then max:=a else max:=b;
end;
begin
write('A B C D -> ');
readln(a,b,c,d);
writeln('MAX = ',max(max(a,b),max(c,d)) );
readln;
end.
var a,b,c,d:longint;
function max(a,b:longint):longint;
begin
if a>b then max:=a else max:=b;
end;
begin
write('A B C D -> ');
readln(a,b,c,d);
writeln('MAX = ',max(max(a,b),max(c,d)) );
readln;
end.