w, h, x, y = map(int, input().split())
ans = (w * h) / 2
print(ans)
if x == w / 2 and y == h / 2:
    print(1)
else:
    print(0) w, h, x, y = map(int, input().split()) w map(int, input().split()) map int input().split() ().split () input split h x y ans = (w * h) / 2 ans (w * h) / 2 w * h w h 2 print(ans) print ans if x == w / 2 and y == h / 2:
    print(1)
else:
    print(0) x == w / 2 and y == h / 2 x == w / 2 x w / 2 w 2 y == h / 2 y h / 2 h 2 print(1) print 1 print(0) print 0 x, y = map(int, input().split()) map(int, input().split()) x y = map(int, input().split()) map(int, input().split()) y w, h, x, y = map(int, input().split()) map(int, input().split()) w h, x, y = map(int, input().split()) map(int, input().split()) h ans = (w * h) / 2 (w * h) / 2 ans
w, h, x, y = map(int, input().split())
ans = (w * h) / 2
print(ans)
if x == w / 2 and y == h / 2:
    print(1)
else:
    print(0)