python declare 2d list
length, breadth = x, y
matrix = [[-1 for j in range(breadth)] for i in range(length)]
# every element is -1python declare 2d list
length, breadth = x, y
matrix = [[-1 for j in range(breadth)] for i in range(length)]
# every element is -1Copyright © 2021 Codeinu
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