read (a);if a mod 2 = 0 then b:=1 else b:=0;
if x>y then begin x:=x-y; y:=x+y endelse begin y:=y-x; x:=x-y end;writeln (x, ',' , y);
readln (a, b);a:=a-b*3;if a>b then c:=a-b else c:=b-a;writeln (c);
readln (a, b); a:=a*b;if a>b*b then b:=a-b;if b>a-1 then begin b:=b-a; a:=a-b endelse begin a:=a-b; b:=b-a end;c:=a*b; writeln (c);
if x<=-2 then y:=-xelse if x<=2 then y:=0 else y:=x;writeln (y);