Sorry, the logic of what the problem suggests is not very clear to me. Should the input 2D matrix be broken up in 2-by-2 matrices first, and why?
@Bainhome, I believe your code cannot perform an adaptive zigzag scan of a valid 2x2 matrix due to the conditional statement implemented.
S**t, a euqal sign is forgotten...THX buddy.
What this code done to the index by using union is well-considered. Nice!
Right and wrong
Project Euler: Problem 16, Sums of Digits of Powers of Two
count to vector
Sum of diagonal of a square matrix
CONVERT TAN TO SIN
Find my secret function II
Find the maxmum value of N*N Matrix
Find my secret function III
Divisible by 21
Stop a ZigZag scanning N*N Matrix at any diag you want
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