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43 changes: 43 additions & 0 deletions0704-Binary_Search/main.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| const nums = [-1, 0, 3, 5, 9, 12]; | ||
| const target1 = 9; | ||
| const target2 = 2; | ||
| function searchUsingLCRC(nums, target) { | ||
| let mid, left = 0, right = nums.length - 1; | ||
| while (left <= right) { | ||
| mid = left + ((right - left) >> 1); | ||
| if (nums[mid] > target) { | ||
| right = mid - 1; | ||
| } | ||
| else if (nums[mid] < target) { | ||
| left = mid + 1; | ||
| } | ||
| else { | ||
| return mid; | ||
| } | ||
| } | ||
| return -1; | ||
| } | ||
| function searchUsingLCRO(nums, target) { | ||
| let mid, left = 0, right = nums.length; | ||
| while (left < right) { | ||
| mid = left + ((right - left) >> 1); | ||
| if (nums[mid] > target) { | ||
| right = mid; | ||
| } | ||
| else if (nums[mid] < target) { | ||
| left = mid + 1; | ||
| } | ||
| else { | ||
| return mid; | ||
| } | ||
| } | ||
| return -1; | ||
| } | ||
| console.time("searchUsingLCRC"); | ||
| searchUsingLCRC(nums, target1); | ||
| console.timeEnd("searchUsingLCRC"); | ||
| console.time("searchUsingLCRO"); | ||
| searchUsingLCRO(nums, target1); | ||
| console.timeEnd("searchUsingLCRO"); | ||
| console.log(searchUsingLCRC(nums, target1)); | ||
| console.log(searchUsingLCRO(nums, target1)); |
50 changes: 50 additions & 0 deletions0704-Binary_Search/main.ts
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| const nums = [-1, 0, 3, 5, 9, 12] | ||
| const target1 = 9 | ||
| const target2 = 2 | ||
| function searchUsingLCRC(nums: number[], target: number): number { | ||
| let mid: number, | ||
| left: number = 0, | ||
| right: number = nums.length - 1 | ||
| while (left <= right) { | ||
| mid = left + ((right - left) >> 1) | ||
| if (nums[mid] > target) { | ||
| right = mid - 1 | ||
| } else if (nums[mid] < target) { | ||
| left = mid + 1 | ||
| } else { | ||
| return mid | ||
| } | ||
| } | ||
| return -1 | ||
| } | ||
| function searchUsingLCRO(nums: number[], target: number): number { | ||
| let mid: number, | ||
| left: number = 0, | ||
| right: number = nums.length | ||
| while (left < right) { | ||
| mid = left + ((right - left) >> 1) | ||
| if (nums[mid] > target) { | ||
| right = mid | ||
| } else if (nums[mid] < target) { | ||
| left = mid + 1 | ||
| } else { | ||
| return mid | ||
| } | ||
| } | ||
| return -1 | ||
| } | ||
| console.time("searchUsingLCRC") | ||
| searchUsingLCRC(nums, target1) | ||
| console.timeEnd("searchUsingLCRC") | ||
| console.time("searchUsingLCRO") | ||
| searchUsingLCRO(nums, target1) | ||
| console.timeEnd("searchUsingLCRO") | ||
| console.log(searchUsingLCRC(nums, target1)) | ||
| console.log(searchUsingLCRO(nums, target1)) |
22 changes: 22 additions & 0 deletions0704-Binary_Search/readme.md
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| Given an array of integers `nums` which is sorted in ascending order, and an integer `target`, write a function to search `target` in `nums`. If `target` exists, then return its index. Otherwise, return `-1`. | ||
| You must write an algorithm with `O(log n)` runtime complexity. | ||
| Example 1: | ||
| > <span style="color: white;">Input</span>: nums = [-1,0,3,5,9,12], target = 9<br> | ||
| > <span style="color: white;">Output</span>: 4<br> | ||
| > <span style="color: white;">Explanation</span>: 9 exists in nums and its index is 4 | ||
| Example 2: | ||
| > <span style="color: white;">Input</span>: nums = [-1,0,3,5,9,12], target = 2<br> | ||
| > <span style="color: white;">Output</span>: -1<br> | ||
| > <span style="color: white;">Explanation</span>: 2 does not exist in nums so return -1 | ||
| Constraints: | ||
| - 1 <= nums.length <= 10<sup>4</sup> | ||
| - -10<sup>4</sup> < nums[i], target < 10<sup>4</sup> | ||
| - All the integers in `nums` are unique. | ||
| - `nums` is sorted in ascending order. |
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