Merge Nodes in Between Zeros
给一个linkedlist, 里面的数字由0分割, 求0之间的数字的和的list.
Archive: February 21, 2022
Count Equal and Divisible Pairs in an Array
给一个数组, 求一个pair, nums[i] == nums[j] 并且 i * j 能被k整除.
Count Integers With Even Digit Sum
给一个range[1,num], 求里面有多少数的digit sum是偶数.