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Leetcode 231: Power of Two

Given an integer n, determine if it is a power of two. An integer n is considered a power of two if there exists an integer x such that n == 2^x.

Oct 14, 2024 - 4 min read

Leetcode 258: Add Digits

Given a non-negative integer num, repeatedly add all of its digits until the result has only one digit, and return it.

Oct 12, 2024 - 4 min read

Leetcode 268: Missing Number

Given an array nums containing n distinct numbers, each in the range [0, n], return the only number in the range that is missing from the array.

Oct 11, 2024 - 4 min read

Leetcode 279: Perfect Squares

Given an integer n, return the least number of perfect square numbers that sum to n. A perfect square is a number that is the square of an integer. Your goal is to determine the minimum number of perfect squares that sum up to the given integer n.

Oct 10, 2024 - 5 min read

Leetcode 319: Bulb Switcher

There are n bulbs initially off. You toggle every ith bulb in the ith round, and at the end, you need to return how many bulbs remain on.

Oct 6, 2024 - 3 min read

Leetcode 342: Power of Four

Given an integer n, return true if it is a power of four. Otherwise, return false. An integer n is a power of four if there exists an integer x such that n == 4^x.

Oct 3, 2024 - 3 min read