1118. Number of Days in a Month

Given a year year and a month month, return the number of days of that month.

243. Shortest Word Distance

Given an array of strings wordsDict and two different strings that already exist in the array word1 and word2, return the shortest distance between these two words in the list.

1085. Sum of Digits in the Minimum Number

Given an integer array nums, return 0 if the sum of the digits of the minimum integer in nums is odd, or 1 otherwise.

1176. Diet Plan Performance

A dieter consumes calories[i] calories on the i-th day.

Given an integer k``k days (calories[i], calories[i+1], ..., calories[i+k-1] for all 0 <= i <= n-k``k days (calories[i] + calories[i+1] + ... + calories[i+k-1]):

• If T < lower, they performed poorly on their diet and lose 1 point;
• If T > upper, they performed well on their diet and gain 1 point;
• Otherwise, they performed normally and there is no change in points.

Initially, the dieter has zero points. Return the total number of points the dieter has after dieting for calories.length days.

Note that the total points can be negative.

1196. How Many Apples Can You Put into the Basket

You have some apples and a basket that can carry up to 5000 units of weight.

Given an integer array weight where weight[i] is the weight of the ith apple, return the maximum number of apples you can put in the basket.

1243. Array Transformation

Given an initial array arr, every day you produce a new array using the array of the previous day.

On the i-th day, you do the following operations on the array of day i-1 to produce the array of day i:

1. If an element is smaller than both its left neighbor and its right neighbor, then this element is incremented.
2. If an element is bigger than both its left neighbor and its right neighbor, then this element is decremented.
3. The first and last elements never change.

After some days, the array does not change. Return that final array.

1271. Hexspeak

A decimal number can be converted to its Hexspeak representation by first converting it to an uppercase hexadecimal string, then replacing all occurrences of the digit '0' with the letter 'O', and the digit '1' with the letter 'I'. Such a representation is valid if and only if it consists only of the letters in the set {'A', 'B', 'C', 'D', 'E', 'F', 'I', 'O'}.

Given a string num representing a decimal integer n, return the Hexspeak representation of n if it is valid, otherwise return "ERROR".

1933. Check if String Is Decomposable Into Value-Equal Substrings

A value-equal string is a string where all characters are the same.

• For example, "1111" and "33" are value-equal strings.
• In contrast, "123" is not a value-equal string.

Given a digit string s``2``3.

Return true if you can decompose s according to the above rules. Otherwise, return false.

A substring is a contiguous sequence of characters in a string.

2229. Check if an Array Is Consecutive

Given an integer array nums, return true if nums is consecutive, otherwise return false.

An array is consecutive if it contains every number in the range [x, x + n - 1] (inclusive), where x is the minimum number in the array and n is the length of the array.

2689. Extract Kth Character From The Rope Tree

You are given the root of a binary tree and an integer k. Besides the left and right children, every node of this tree has two other properties, a string node.val containing only lowercase English letters (possibly empty) and a non-negative integer node.len. There are two types of nodes in this tree:

• Leaf: These nodes have no children, node.len = 0, and node.val is some non-empty string.
• Internal: These nodes have at least one child (also at most two children), node.len > 0, and node.val is an empty string.

The tree described above is called a Rope binary tree. Now we define S[node] recursively as follows:

• If node is some leaf node, S[node] = node.val,
• Otherwise if node is some internal node, S[node] = concat(S[node.left], S[node.right]) and S[node].length = node.len.

Return k-th character of the string S[root].

Note: If s and p are two strings, concat(s, p) is a string obtained by concatenating p to s. For example, concat("ab", "zz") = "abzz".