Please try to solve a harder version "Problem 44448. Project Euler: Problem 14 Longest Collatz sequence"
Check to see if a Sudoku Puzzle is Solved
Change the sign of even index entries of the reversed vector
Count consecutive 0's in between values of 1
Rounding off numbers to n decimals
Pi Digit Probability
Getting the indices from a matrix
Find files with extension ext in the current directory
BLOCK x3 (Version 4)
Decrypt the cypher using XOR encryption (for beginners)
Narcissistic number ?
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