Program lovely_pairs;
Var a: array [1..100] of integer;
i, j, n, k: integer;
Begin
Write('vvedite kol-vo chisel: '); Readln(n);
For i := 1 to n do begin
write('vvedite ', i, ' chislo: '); Readln(a[i]);
End;
k := 0;
for i := 1 to n do begin
for j := 1 to n do begin
if (a[i] - a[j]) = 2 {parnye - eto a-b == 2 }
then begin k:=k+1; writeln('Para ', k, ': ', a[i], ' & ', a[j]); end;
end;
end;
End.