Var
 a:array[0..5] of longint;
 b,c,d,e,i:longint;
begin
 b:=-maxlongint;
 for i:=1 to 5 do read(a[i]);
 for i:=1 to 5 do if a[i]*a[i-1]>b then b:=a[i]*a[i-1];
 writeln(b);
end.

Var ar:array[1..10] of integer;
max,i:integer;
begin;
randomize;
max:=-1;
writeln('Array:');
for i:=1 to 10 do
 begin;
  ar[i]:=random(100);
  write(ar[i]:4);
 end;
writeln;
writeln('Combinations:');
for i:=2 to 10 do
 begin;
   write(ar[i]*ar[i-1]:6);
   if ar[i]*ar[i-1]>max then max:=ar[i]*ar[i-1];
 end;
writeln;
writeln('Result:',max);
end.