Скачать или смотреть Leetcode 3354. Make Array Elements Equal to Zero

In this intriguing interview problem from LeetCode, you are given an integer array nums. You must pick a starting index curr where nums[curr] == 0, then choose a starting direction (left or right). As you move:

If you land on a zero value, you continue stepping in the same direction.
If you land on a positive value, you decrement that value by 1, reverse your direction, and then move one step.
The process ends when you step out of array bounds. The selection (initial index + direction) is valid if all elements become zero by the end.
Progiez
The clever solution uses prefix-sum logic: compute the total sum s of all elements; as you scan the array maintaining a running left-sum l, at each nums[i]==0 position you check:

if l == s − l then you get 2 valid directions
if |l − (s − l)| == 1 then you get 1 valid direction
else 0 for that position.
This runs in O(n) time and O(1) extra space (beyond input).
Whether you're prepping for coding interviews, brushing up on prefix-sum techniques or directional simulation logic, this problem is a neat blend of math, array scanning and simulation.

Problem link -- https://leetcode.com/problems/make-ar...

Make Array Elements Equal to Zero
LeetCode 3354
LeetCode problem 3354
array directional movement simulation
prefix sum array problem
count valid starting selections array
pick starting zero index left or right
decrement and bounce direction problem
simulation + prefix-sum logic interview
time complexity O(n) array scanning
space complexity O(1) solution
Java/Python/C++ solution LeetCode 3354
interview prep array simulation
programming challenge directional bounce
coding interview problem array maths
valid selections starting direction logic
total sum left sum right sum check
difference one or equal logic in array

algorithm count selections from zeros

Hashtags

#LeetCode #LeetCode3354 #CodingInterview #Algorithms #ArrayProblem #PrefixSum #Simulation #InterviewPrep #DataStructuresAndAlgorithms #DSA #ProgrammingChallenge #SoftwareEngineering #ArraySimulation #ProblemSolving

Tags

LeetCode 3354, Make Array Elements Equal to Zero, array simulation problem, prefix-sum technique, starting index zero logic, decrement and bounce direction, count valid selections array, time O(n) space O(1), Java solution, Python solution, C++ solution, directional movement algorithm, coding interview question, medium LeetCode, array & math hybrid problem.