50 популярных задач на собеседовании по программированию

What language are these on, please?

python programming language, and he showed some JavaScript in some questions

basic

Список задач:
0 - Introduction
1 - Find pair that sums up to k
2 - First repeating character
3 - Remove duplicates
4 - Find the duplicate
5 - Tree depth first search
6 - Maximum subarray
7 - Reverse binary tree
8 - Longest substring without repeating characters
9 - Reverse linked list
10 - Peak finding
11 - Palindrome linked list
12 - Longest possible palindrome
13 - Get substring index
14 - Tree breadth first search
15 - Sort linked list
16 - Valid binary search tree
17 - Minimum cost path in matrix
18 - Balanced binary tree
19 - Paths in matrix
20 - Tree breadth first search II
21 - Product of array except self
22 - Jump to last index
23 - Graph depth first search
24 - Graph breadth first search
25 - String subsequences
26 - Valid brackets
27 - Flatten binary tree
28 - Lowest common ancestor
29 - Minimum in rotated sorted array
30 - Add two linked lists
31 - Ways to climb stairs
32 - Subsets that sum up to k
33 - Ways to decode
34 - Remove node from binary search tree
35 - Array permutations
36 - Longest common subsequence
37 - Longest consecutive sequence
38 - Edit distance
39 - Longest common substring
40 - Smallest number after removing k digits
41 - Insert interval
42 - Merge intervals
43 - Maximum path sum
44 - 0-1 Knapsack
45 - Shortest palindrome
46 - Coin change
47 - Word search
48 - N-queens
49 - Word ladder
50 - Longest increasing subsequence

Noice!

Красава, respect!