0081-search-in-rotated-sorted-array-ii.java

class Solution {

    public boolean search(int[] nums, int target) {
        int l = 0, r = nums.length - 1;
        while (l <= r) {
            // to avoid duplicates
            while (l < r && nums[l] == nums[l + 1]) ++l;
            while (l < r && nums[r] == nums[r - 1]) --r;

            int m = l + (r - l) / 2;

            int num = (nums[m] < nums[0]) == (target < nums[0])
                ? nums[m]
                : target < nums[0] ? Integer.MIN_VALUE : Integer.MAX_VALUE;

            if (num < target) {
                l = m + 1;
            } else if (num > target) {
                r = m - 1;
            } else {
                return true;
            }
        }
        return false;
    }
}