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Given an integer n, return the number of prime numbers that are strictly less than n.A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.For example, 2, 3, 5, 7 are prime numbers, but 4, 6, 8, 9 are not. Constraints 0 <= n <= 5 10^6 ExampleInput: n
Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Constraints: 2 <= nums.length <= 10^4 10^9 <= nums[i] <= 10^9 10^9 <=
Given an array of strings strs, find the longest common prefix among all strings in the array.If there is no common prefix, return an empty string "". Input: strs is an array of strings. Constraints: 1 <= strs.length <= 200 0 <= strs[i].length <= 200 strs[i] consists of only lowercase English letter
Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array. Constraints: n == nums.length 1 <= n <= 10^4 0 <= nums[i] <= n All numbers in nums are unique. Example 1: Input: nums = [3,0,1] Output: 2 Explanation: n = 3 (the
Learn how to find the sum of digits of a number in Python using the modulo operator, with code and output.
Learn how to check whether a number is a perfect number in Python by summing its proper divisors, with code and output.
Learn how to convert a temperature from Celsius to Fahrenheit in Python using the standard formula, with code and output.
Learn how to find the largest number in a list in Python using a simple loop, with code and output.
Learn how to check whether a year is a leap year in Python using the standard leap year rule, with code and output.
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