Leetcode: happy number
Leetcode: happy number
CodeWars: highest and lowest
CodeWars: highest and lowest
CodeWars: square every digit
CodeWars: square every digit
CodeWars: sum of a sequence
CodeWars: sum of a sequence
CodeWars: sum of digits / digital root(02/21更新)
CodeWars: sum of digits / digital root(02/21更新)
CodeWars: credit card mask
CodeWars: credit card mask
Leetcode挑戰: Day15 excel sheet column title
Leetcode挑戰: Day15 excel sheet column title
Leetcode挑戰: Day14 sqrtx
Leetcode挑戰: Day14 sqrtx
Leetcode挑戰: Day13 search insert position
Leetcode挑戰: Day13 search insert position
Leetcode挑戰: Day12 plus one
Leetcode挑戰: Day12 plus one