def chance_of_kill(die, hp):
if hp <= die:
return (die + 1 - hp) / die
else:
return chance_of_kill(die, hp - die) / die
print(chance_of_kill(4, 1))
print(chance_of_kill(4, 4))
print(chance_of_kill(4, 5))
print(chance_of_kill(4, 6))
print(chance_of_kill(1, 10))
print(chance_of_kill(100, 200))
print(chance_of_kill(8, 20))
ZGVmIGNoYW5jZV9vZl9raWxsKGRpZSwgaHApOgogICAgaWYgaHAgPD0gZGllOgogICAgICAgIHJldHVybiAoZGllICsgMSAtIGhwKSAvIGRpZQogICAgZWxzZToKICAgICAgICByZXR1cm4gY2hhbmNlX29mX2tpbGwoZGllLCBocCAtIGRpZSkgLyBkaWUKCgpwcmludChjaGFuY2Vfb2Zfa2lsbCg0LCAxKSkKcHJpbnQoY2hhbmNlX29mX2tpbGwoNCwgNCkpCnByaW50KGNoYW5jZV9vZl9raWxsKDQsIDUpKQpwcmludChjaGFuY2Vfb2Zfa2lsbCg0LCA2KSkKcHJpbnQoY2hhbmNlX29mX2tpbGwoMSwgMTApKQpwcmludChjaGFuY2Vfb2Zfa2lsbCgxMDAsIDIwMCkpCnByaW50KGNoYW5jZV9vZl9raWxsKDgsIDIwKSk=