mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-12-18 01:00:15 +00:00
46 lines
874 B
Python
46 lines
874 B
Python
"""
|
||
Champernowne's constant
|
||
Problem 40
|
||
An irrational decimal fraction is created by concatenating the positive
|
||
integers:
|
||
|
||
0.123456789101112131415161718192021...
|
||
|
||
It can be seen that the 12th digit of the fractional part is 1.
|
||
|
||
If dn represents the nth digit of the fractional part, find the value of the
|
||
following expression.
|
||
|
||
d1 × d10 × d100 × d1000 × d10000 × d100000 × d1000000
|
||
"""
|
||
|
||
|
||
def solution():
|
||
"""Returns
|
||
|
||
>>> solution()
|
||
210
|
||
"""
|
||
constant = []
|
||
i = 1
|
||
|
||
while len(constant) < 1e6:
|
||
constant.append(str(i))
|
||
i += 1
|
||
|
||
constant = "".join(constant)
|
||
|
||
return (
|
||
int(constant[0])
|
||
* int(constant[9])
|
||
* int(constant[99])
|
||
* int(constant[999])
|
||
* int(constant[9999])
|
||
* int(constant[99999])
|
||
* int(constant[999999])
|
||
)
|
||
|
||
|
||
if __name__ == "__main__":
|
||
print(solution())
|