LeetCode-in-Java

2529. Maximum Count of Positive Integer and Negative Integer

Easy

Given an array nums sorted in non-decreasing order, return the maximum between the number of positive integers and the number of negative integers.

• In other words, if the number of positive integers in nums is pos and the number of negative integers is neg, then return the maximum of pos and neg.

Note that 0 is neither positive nor negative.

Example 1:

Input: nums = [-2,-1,-1,1,2,3]

Output: 3

Explanation: There are 3 positive integers and 3 negative integers. The maximum count among them is 3.

Example 2:

Input: nums = [-3,-2,-1,0,0,1,2]

Output: 3

Explanation: There are 2 positive integers and 3 negative integers. The maximum count among them is 3.

Example 3:

Input: nums = [5,20,66,1314]

Output: 4

Explanation: There are 4 positive integers and 0 negative integers. The maximum count among them is 4.

Constraints:

• 1 <= nums.length <= 2000
• -2000 <= nums[i] <= 2000
• nums is sorted in a non-decreasing order.

Follow up: Can you solve the problem in O(log(n)) time complexity?

Solution

public class Solution {
    public int maximumCount(int[] nums) {
        int plus = 0;
        int minus = 0;
        for (int num : nums) {
            if (num > 0) {
                plus++;
            }
            if (num < 0) {
                minus++;
            }
        }
        return Math.max(plus, minus);
    }
}

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