35.search-insert-position.java

/*
 * @lc app=leetcode id=35 lang=java
 *
 * [35] Search Insert Position
 *
 * https://leetcode.com/problems/search-insert-position/description/
 *
 * algorithms
 * Easy (40.74%)
 * Likes:    1436
 * Dislikes: 191
 * Total Accepted:    430.3K
 * Total Submissions: 1M
 * Testcase Example:  '[1,3,5,6]\n5'
 *
 * Given a sorted array and a target value, return the index if the target is
 * found. If not, return the index where it would be if it were inserted in
 * order.
 *
 * You may assume no duplicates in the array.
 *
 * Example 1:
 *
 *
 * Input: [1,3,5,6], 5
 * Output: 2
 *
 *
 * Example 2:
 *
 *
 * Input: [1,3,5,6], 2
 * Output: 1
 *
 *
 * Example 3:
 *
 *
 * Input: [1,3,5,6], 7
 * Output: 4
 *
 *
 * Example 4:
 *
 *
 * Input: [1,3,5,6], 0
 * Output: 0
 *
 *
 */
class Solution {
  public int searchInsert(int[] nums, int target) {
    int low = 0;
    int high = nums.length - 1;

    while (low <= high) {
      int mid = low + ((high - low) >> 1);
      if (nums[mid] == target) {
        return mid;
      } else if (nums[mid] > target) {
        high = mid - 1;
      } else {
        low = mid + 1;
      }
    }

    return low;
  }
}