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LeetCode 485, Easy. Topics: Array. View on LeetCode. Generate this problem as a practice environment: tested reference solution, 12 parametrized pytest cases, and a playground notebook:

Problem

Given a binary array nums, return the maximum number of consecutive 1’s in the array.

Examples

Constraints

  • 1 <= nums.length <= 10^5
  • nums[i] is either 0 or 1.

Solution

Reference implementation from solution.py on GitHub, full suite in test_solution.py:

Complexity

Tags

NeetCode All.
Last modified on September 7, 2026