Program BTT;
Uses crt;
Var A: array[1..1000] of longint;
n,i,j,max,min: longint;
Begin
Clrscr;
Write('Nhap n: '); Readln(n);
min:=maxlongint;
For i:=1 to n do
Begin
Write('A[',i,'] = ');
Readln(A[i]);
If A[i]<min then
min:=A[i];
End;
max:=A[1];
For i:=2 to n do
If A[i]>max then
max:=A[i];
Writeln('Max: ',max);
Writeln('Min: ',min);
Write('Nhap k: '); Readln(k);
For i:=1 to n-1 do
For j:=i+1 to n do
If abs(A[i]-A[j])<k then Writeln(A[i],' ',A[j]);
Readln
End.