LeetCode 1437: Check If All 1's Are at Least K Apart (ACERS Guide)
Subtitle / Summary A classic event-spacing validation model. This ACERS guide explains the one-pass logic, engineering use cases, and runnable multi-language solutions. Reading time: 10–12 min Tags: array, two pointers, event spacing SEO keywords: LeetCode 1437, event spacing, O(n) Meta description: One-pass validation for minimum spacing between 1s, with engineering use cases and multi-language code. Target Readers LeetCode learners building stable templates Engineers working on monitoring / risk control / behavior analytics Developers who need spacing or rate-limit validations Background / Motivation Many systems require events to be spaced apart: login failures, alarms, sensitive actions, API calls, etc. This problem maps directly to event spacing validation. A one-pass, O(1)-memory solution is ideal for real-time systems. ...