Unfortunately I was not able to find the numbers of corresponding problems in leetcode database so please update this thread if you can find them

1. https://leetcode.com/problems/verifying-an-alien-dictionary/
   Given two input arrays: one with strings and second with the order of letters, determine if the first array is sorted according to the second array order, e.g.
   Example 1:

   array1: ["cat", "bat", "dog"]
   array2: ['c', 'x', 'b', 'd']
   output: TRUE
   Example 2:

   array1: ["xy", "xa", "x"]
   array2: ['y', 'a', 'x']
   output: FALSE
2. Given non-decreasing array and a value k return the number of occurences of k in the array (or -1 if the value does not exist in the array)
   Example 1:

   array: [1, 2, 3, 3, 8]
   k: 3
   output: 2
   Example 2:

   array: [1, 2, 3, 3, 8]
   k: 4
   output: -1
3. A variant of the Candy Crush problem. For the given input string replace each consecutive three same element values by one occurence of this value
   Examples:

   abbbc → ac
   abbbbc → abc
   abbc → abbc
4. Desing distributed web crawler using a botnet