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First solution in Clear category for Zigzag Array by alterGNU
from typing import List
def create_zigzag(rows: int, cols: int, start: int = 1) -> List[List[int]]:
S=[x for x in range(start,start+rows*cols,1)]
mat=[]
i=0
for l in range(rows):
line=[]
for c in range(cols):
line.append(S[i])
i+=1
if l%2:mat.append(line[::-1])
else:mat.append(line)
return mat
if __name__ == '__main__':
print("Example:")
print(create_zigzag(3, 3, 5))
# These "asserts" are used for self-checking and not for an auto-testing
assert create_zigzag(3, 5) == [
[1,2,3,4,5],
[10,9,8,7,6],
[11,12,13,14,15]
]
assert create_zigzag(5, 1) == [
[1],
[2],
[3],
[4],
[5]
]
assert create_zigzag(3, 3, 5) == [
[5, 6, 7],
[10, 9, 8],
[11, 12, 13]
]
# Edge cases
assert create_zigzag(0, 3) == []
assert create_zigzag(3, 0) == [[], [], []]
assert create_zigzag(0, 0) == []
print("Coding complete? Click 'Check' to earn cool rewards!")
July 30, 2021
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