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- #!/usr/bin/env python3
- import sys
- from itertools import pairwise
- def predict(n):
- return n[-1] + predict([r - l for l, r in pairwise(n)]) if any(n) else 0
- histories = [list(map(int, line.split())) for line in sys.stdin]
- print(sum(map(predict, histories)))
- print(sum(predict(h[::-1]) for h in histories))
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