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Straightforward solution in Clear category for Feed Pigeons by Flying_Eye
def checkio(number):
step = pidgeons = 1
while number > pidgeons:
number -= pidgeons
step += 1
pidgeons += step
pidgeons -= step
return pidgeons + max(0, number - pidgeons)
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"
May 4, 2016