day-2.py

import itertools


def slide(xs, k=2):
    xs = list(xs)
    for i in range(len(xs) - k + 1):
        yield xs[i : i + k]


print(
    sum(
        [
            b > a
            for a, b in itertools.pairwise(
                [sum(y) for y in slide((map(int, open("input1").readlines())), k=3)]
            )
        ]
    )
)