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First solution in Clear category for Feed Pigeons by indablackk
def checkio(number):
p = n = 1
while True:
number -= p
if number <= p:
if number < 0: return p + number
else: return p
n += 1
p += n
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert checkio(1) == 1, "1st example"
assert checkio(2) == 1, "2nd example"
assert checkio(5) == 3, "3rd example"
assert checkio(10) == 6, "4th example"
Oct. 19, 2015
