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First solution in Clear category for Ghosts Age by testarossa
def checkio(opacity):
if opacity == 10000:
return 0
if opacity == 9999:
return 1
dx = 10002 - opacity
now = 1
nxt = 2
for i in range(2, 20):
now, nxt = nxt, now + nxt
if nxt + i >= dx:
return now + nxt + i - dx
return 0
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio(10000) == 0, "Newborn"
assert checkio(9999) == 1, "1 year"
assert checkio(9997) == 2, "2 years"
assert checkio(9994) == 3, "3 years"
assert checkio(9995) == 4, "4 years"
assert checkio(9990) == 5, "5 years"
Nov. 19, 2016
