12 lines
288 B
Python
12 lines
288 B
Python
#!/usr/bin/env python3
|
|
from math import comb
|
|
|
|
lines = (x.strip() for x in open("input.txt"))
|
|
result = 0
|
|
|
|
for line in lines:
|
|
numbers = [int(x) for x in line.split(" ")]
|
|
result += sum((idx%2*-2+1) * comb(len(numbers), idx+1) * val for idx, val in enumerate(numbers))
|
|
|
|
print(result)
|