# ======== Imports ======= import sys import random as R from collections import deque from math import * from pyhof import * import itertools as it import functools as ft import more_itertools as mit import operator as op
d = [[] for _ in range(len(x) + len(x[0]) - 1)] d = map(curry(constantly)([]), range(len(x) + len(x[0]) - 1))
map(lambda _: [], ...)
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