PY
py
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#python 3.7.1
n=(-1)
while True:
n+=1
nstr=str(n)
nlen=len(str(n))
if nlen==1:
print("00"+nstr, end="")
elif nlen==2:
print("0"+nstr, end="")
else:
print(n, end="")
if n==999:
break
## Yeah :)
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OUTPUT
Run