l, w, r1, r2 = map(int, input().split())
if w > l: l, w = w, l
x = l - r1 - r2
y = w - r1 - r2
print('YES' if 2 * r1 <= w and 2 * r2 <= w and x * x + y * y >= (r1 + r2)**2 else 'NO')