Doubt in Intuition

#1

Can you share your intuition about this problem in a detailed fashion so as to understand it conceptually?

#2

hi @yaheyafarooqui_8319591c036ff6e9
go through this -->

#3

// Set i and j according to direction

if (i < 0 && j <= n - 1)

i = 0;

if (j == n)

i = i + 2, j--;

}

can you explain these steps from the article linked?

#4

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