Section 1Understand Problem
Section 01
Understand the problem
Restate the problem precisely. Interviewers reward candidates who pause, define the contract, and name the guarantees before coding.
Problem statement
You are given an integer array `height` of length n. There are n vertical lines drawn such that the two endpoints of the i-th line are (i, 0) and (i, height[i]). Find two lines that together with the x-axis form a container that holds the most water. Return the maximum amount of water a container can store.
Example
height = [1, 8, 6, 2, 5, 4, 8, 3, 7] → 49
Constraints
2 ≤ n ≤ 10⁵ · 0 ≤ height[i] ≤ 10⁴
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