Write a NumPy program to find the indices of elements equal to zero in a NumPy array. Sample Solution: Python Code: # Importing the NumPy library and aliasing it as 'np'importnumpyasnp# Creating a NumPy array 'nums' containing integersnums=np.array([1,0,2,0,3,0,4,5,6,7,8])# P...
输入:nums = [1,2,3,5,5,7] target = 5 输出:[3,4] 输入:nums = [1,5,8,9] target = 7 输出:[-1,-1] 解决思路:二分查找直到找到第一个目标值,再对目标值左右进行二分查找 Python代码: classSolution(object):defsearchRange(self, nums, target):""":type nums: List[int] :type target...
题目地址:https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/description/ 题目描述 Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. Your ...
:type target: int :rtype: List[int]"""first=0 last= len(nums) - 1found=False results= [-1, -1]ifnums ==[]:returnresultsiftarget < nums[0]ortarget >nums[last]:returnresultswhilefirst <= lastandnotfound: mid= (first + last) // 2 #找到了,分别继续向前,向后查找,直到找到第一个...
1. Find the Most Frequent Element using ‘collections.Counter()‘ Python’scollectionsmodule provides a convenient data structure calledCounterfor counting hashable objects in a sequence efficiently. When initializing aCounterobject, you can pass an iterable (such as a list, tuple, or string) or ...
Python Array Exercises, Practice and Solution: Write a Python program to find the first duplicate element in a given array of integers. Return -1 if there are no such elements.
32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 代码是转自:https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/discuss/362807/0-ms-faster-than-100.00-of-Java-online-submissions
Given an array of integersnumssorted in ascending order, find the starting and ending position of a giventargetvalue. Iftargetis not found in the array, return[-1, -1]. You must write an algorithm withO(log n)runtime complexity.
Example 1: Using findIndex() method // function that returns even numberfunctionisEven(element){returnelement %2==0; }// defining an array of integersletnumbers = [1,45,8,98,7]; // returns the index of the first even number in the arrayletfirstEven = numbers.findIndex(isEven); ...
FindIndex<T>(T[], Int32, Predicate<T>) Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the first occurrence within the range of elements in the Array that extends from the specified index to the last element. Fin...