chore: clean up content phase organization

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---
title: '153. Find Minimum in Rotated Sorted Array'
description: 'Suppose an array of length n sorted in ascending order is rotated between 1 and n times. For example, the array nums = [0,1,2,4,5,6,7] might become:'
sidebar:
label: 'Find Minimum in Rotated Sorted Array'
badge: 'Medium'
---
<Badge variant="accent">Array</Badge>
::::warning
Notice that rotating an array [a[0], a[1], a[2], ..., a[n-1]] 1 time results in the array [a[n-1], a[0], a[1], a[2], ..., a[n-2]].
::::
### Example 1:
- Input: `nums = [3,4,5,1,2]`
- Output: `1`
- Explanation: The original array was `[1,2,3,4,5]` rotated `3` times.
### Example 2:
- Input: `nums = [4,5,6,7,0,1,2]`
- Output: `0`
- Explanation: The original array was `[0,1,2,4,5,6,7]` and it was rotated `4` times.
### Example 3:
- Input: `nums = [11,13,15,17]`
- Output: `11`
- Explanation: The original array was `[11,13,15,17]` and it was rotated `4` times.
### Constraints:
- `n == nums.length`
- `1 <= n <= 5000`
- `-5000 <= nums[i] <= 5000`
- All the integers of `nums` are unique.
- `nums` is sorted and rotated between 1 and `n` times.
## Approach
```mermaid
flowchart TD
S(["findMin(nums)"]) --> I["l = 0, r = n-1, lowest_index = -1"]
I --> W{"l <= r?"}
W -- no --> E(["return nums[lowest_index]"])
W -- yes --> M["m = (l + r) // 2"]
M --> C{"nums[m] <= nums[-1]?"}
C -- yes --> A["in the right sorted run: record lowest_index = m, r = m - 1"]
A --> W
C -- no --> B["still in the left sorted run: l = m + 1"]
B --> W
```
## Solution
```py
class Solution:
def findMin(self, nums: List[int]) -> int:
l, r = 0, len(nums) - 1
lowest_index = -1
while l <= r:
m = (l + r) // 2
if nums[m] <= nums[-1]:
lowest_index = m
r = m - 1
else:
l = m + 1
return nums[lowest_index]
```
## Explanation
<YouTube id="nIVW4P8b1VA" title="Find Minimum in Rotated Sorted Array - Binary Search - Leetcode 153 - Python" />
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---
title: '33. Search in Rotated Sorted Array'
description: There is an integer array nums sorted in ascending order (with distinct values)
sidebar:
label: 'Search in Rotated Sorted Array'
badge: 'Medium'
---
<Badge variant="accent">Array</Badge>
::::warning
You must write an algorithm with O(log n) runtime complexity.
::::
### Example 1:
- Input: `nums = [4,5,6,7,0,1,2], target = 0`
- Output: `4`
### Example 2:
- Input: `nums = [4,5,6,7,0,1,2], target = 3`
- Output: `-1`
### Example 3:
- Input: `nums = [1], target = 0`
- Output: `-1`
### Constraints:
- `1 <= nums.length <= 5000`
- `-10^4 <= nums[i] <= 10^4`
- All values of `nums` are unique.
- `nums` is an ascending array that is possibly rotated.
- `-10^4 <= target <= 10^4`
## Approach
```mermaid
flowchart TD
S(["search(nums, target)"]) --> I["l = 0, r = n - 1"]
I --> W{"l <= r?"}
W -- no --> E(["return -1"])
W -- yes --> M["mid = floor((l + r) / 2)"]
M --> F{"nums[mid] == target?"}
F -- yes --> R(["return mid"])
F -- no --> H{"nums[l] <= nums[mid]? — left half sorted"}
H -- yes --> A{"target outside [nums[l], nums[mid]]?"}
A -- yes --> A1["l = mid + 1 — search the right half"]
A -- no --> A2["r = mid - 1"]
H -- no --> B{"target outside [nums[mid], nums[r]]?"}
B -- yes --> B1["r = mid - 1 — search the left half"]
B -- no --> B2["l = mid + 1"]
A1 --> W
A2 --> W
B1 --> W
B2 --> W
```
## Solution
```js
/**
* @param {number[]} nums
* @param {number} target
* @return {number}
*/
var search = function(nums, target) {
let l = 0, r = nums.length - 1;
while (l <= r){
let mid = Math.floor((l + r)/2);
if (target === nums[mid]) {
return mid
}
// Left sorted portion
if (nums[l] <= nums[mid]){
if (target > nums[mid] || target < nums[l]){
l = mid + 1;
}else{
r = mid - 1;
}
}
// Right sorted portion
else{
if(target < nums[mid] || target > nums[r]){
r = mid - 1;
}else{
l = mid + 1;
}
}
}
return -1;
};
```
## Explanation
<YouTube id="U8XENwh8Oy8" title="Search in rotated sorted array - Leetcode 33 - Python" />
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---
title: '35. Search Insert Position'
description: Given a sorted array of distinct integers 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
sidebar:
label: 'Search Insert Position'
badge: 'Easy'
---
<Badge variant="accent">Array</Badge>
::::warning
You must write an algorithm with O(log n) runtime complexity.
::::
### Example 1:
- Input: `nums = [1,3,5,6], target = 5`
- Output: `2`
### Example 2:
- Input: `nums = [1,3,5,6], target = 2`
- Output: `1`
### Example 3:
- Input: `nums = [1,3,5,6], target = 7`
- Output: `4`
### Constraints:
- `1 <= nums.length <= 10^4`
- `-10^4 <= nums[i] <= 10^4`
- `nums` contains distinct values sorted in ascending order.
- `-10^4 <= target <= 10^4`
## Approach
```mermaid
flowchart TD
S(["searchInsert(nums, target)"]) --> I["l = 0, r = n - 1"]
I --> W{"l <= r?"}
W -- yes --> M["m = (l + r) // 2"]
M --> Q{"nums[m] vs target"}
Q -- equal --> R(["return m"])
Q -- "nums[m] < target" --> L["l = m + 1"]
L --> W
Q -- "nums[m] > target" --> H["r = m - 1"]
H --> W
W -- no --> E(["return (l + r) // 2 + 1 — the insert slot"])
```
## Solution
```py
class Solution:
def searchInsert(self, nums: List[int], target: int) -> int:
l, r = 0, len(nums) - 1
while l <= r:
m = (l + r) // 2
if nums[m] == target:
return m
elif nums[m] < target:
l = m + 1
elif nums[m] > target:
r = m - 1
return (l + r) // 2 + 1
```
## Explanation
<YouTube id="K-RYzDZkzCI" title="Search Insert Position - Binary Search - Leetcode 35 - Python" />
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---
title: '704. Binary Search'
description: 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
sidebar:
label: 'Binary Search'
badge: 'Easy'
---
<Badge variant="accent">Array</Badge>
::::warning
You must write an algorithm with O(log n) runtime complexity.
::::
### Example 1:
- Input: `nums = [-1,0,3,5,9,12], target = 9`
- Output: `4`
- Explanation: `9` exists in `nums` and its index is `4`
### Example 2:
- Input: `nums = [-1,0,3,5,9,12], target = 2`
- Output: `-1`
- Explanation: `2` does not exist in `nums` so return `-1`
### Constraints:
- `1 <= nums.length <= 10^4`
- `-10^4 < nums[i], target < 10^4`
- All the integers in `nums` are unique.
- `nums` is sorted in ascending order.
## Approach
```mermaid
flowchart TD
S(["search(nums, target)"]) --> I["left = 0, right = n - 1"]
I --> W{"left <= right?"}
W -- no --> E(["return -1"])
W -- yes --> M["mid = left + floor((right - left) / 2)"]
M --> Q{"nums[mid] vs target"}
Q -- equal --> R(["return mid"])
Q -- "nums[mid] < target" --> L["left = mid + 1"]
L --> W
Q -- "nums[mid] > target" --> H["right = mid - 1"]
H --> W
```
## Solution
```js
/**
* @param {number[]} nums
* @param {number} target
* @return {number}
*/
var search = function(nums, target) {
let left = 0;
let right = nums.length - 1;
while(left <= right) {
const mid = left + Math.floor((right - left) / 2);
if (nums[mid] === target) {
return mid;
} else if(nums[mid] < target){
left = mid + 1;
} else if (nums[mid] > target) {
right = mid - 1;
}
}
return -1;
};
```
## Explanation
<YouTube id="s4DPM8ct1pI" title="Binary Search - Leetcode 704 - Python" />
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---
title: '74. Search a 2D Matrix'
description: 'You are given an m x n integer matrix matrix with the following two properties:'
sidebar:
label: 'Search a 2D Matrix'
badge: 'Medium'
---
<Badge variant="accent">Array</Badge>
::::warning
You must write a solution in O(log(m * n)) time complexity.
::::
### Example 1:
- Input: `matrix = [[1,3,5,7],[10,11,16,20],[23,30,34,60]], target = 3`
- Output: `true`
### Example 2:
- Input: `matrix = [[1,3,5,7],[10,11,16,20],[23,30,34,60]], target = 13`
- Output: `false`
### Constraints:
- `m == matrix.length`
- `n == matrix[i].length`
- `1 <= m, n <= 100`
- `-10^4 <= matrix[i][j], target <= 10^4`
## Approach
```mermaid
flowchart TD
S(["searchMatrix(matrix, target)"]) --> I["top = 0, bot = ROWS - 1"]
I --> W1{"top <= bot?"}
W1 -- yes --> R1["row = (top + bot) // 2"]
R1 --> C1{"target vs that row's range"}
C1 -- "above matrix[row][-1]" --> U["top = row + 1"]
C1 -- "below matrix[row][0]" --> V["bot = row - 1"]
C1 -- inside --> B(["break — row found"])
U --> W1
V --> W1
W1 -- no --> F(["return False — no row can hold it"])
B --> P["row = (top + bot) // 2; l = 0, r = COLS - 1"]
P --> W2{"l <= r?"}
W2 -- no --> G(["return False"])
W2 -- yes --> M["m = (l + r) // 2"]
M --> C2{"target vs matrix[row][m]"}
C2 -- greater --> X["l = m + 1"]
C2 -- smaller --> Y["r = m - 1"]
C2 -- equal --> T(["return True"])
X --> W2
Y --> W2
```
## Solution
```py
class Solution:
def searchMatrix(self, matrix: List[List[int]], target: int) -> bool:
ROWS, COLS = len(matrix), len(matrix[0])
top, bot = 0, ROWS - 1
while top <= bot:
row = (top + bot) // 2
if target > matrix[row][-1]:
top = row + 1
elif target < matrix[row][0]:
bot = row - 1
else:
break
if not (top <= bot):
return False
row = (top + bot) // 2
l, r = 0, COLS - 1
while l <= r:
m = (l + r) // 2
if target > matrix[row][m]:
l = m + 1
elif target < matrix[row][m]:
r = m - 1
else:
return True
return False
```
## Explanation
<YouTube id="Ber2pi2C0j0" title="Search a 2D Matrix - Leetcode 74 - Python" />
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---
title: '875. Koko Eating Bananas'
description: Koko loves to eat bananas. There are n piles of bananas, the i^th pile has piles[i] bananas. The guards have gone and will come back in h hours
sidebar:
label: 'Koko Eating Bananas'
badge: 'Medium'
---
<Badge variant="accent">Array</Badge>
### Example 1:
- Input: `piles = [3,6,7,11], h = 8`
- Output: `4`
### Example 2:
- Input: `piles = [30,11,23,4,20], h = 5`
- Output: `30`
### Example 3:
- Input: `piles = [30,11,23,4,20], h = 6`
- Output: `23`
### Constraints:
- `1 <= piles.length <= 10^4`
- `piles.length <= h <= 10^9`
- `1 <= piles[i] <= 10^9`
## Approach
```mermaid
flowchart TD
S(["minEatingSpeed(piles, h)"]) --> I["l = 1, r = max(piles)"]
I --> W{"l < r?"}
W -- no --> E(["return l — the smallest workable speed"])
W -- yes --> M["mid = floor((l + r) / 2)"]
M --> K["kWorks(mid): hours = sum of ceil(p / mid)"]
K --> Q{"hours <= h?"}
Q -- yes --> A["r = mid — keep mid, try slower"]
Q -- no --> B["l = mid + 1 — too slow, speed up"]
A --> W
B --> W
```
## Solution
```js
/**
* @param {number[]} piles
* @param {number} h
* @return {number}
*/
var minEatingSpeed = function(piles, h) {
// Function to determine if K works for the H
function kWorks(k){
let hours = 0;
for (let p of piles){
hours += Math.ceil(p/k)
}
return hours <= h;
}
// Setup Binary Search
let l = 1;
let r = Math.max(...piles);
// Find the K value which works for H and consumes all bananas
while (l < r){
const mid = Math.floor((l + r) / 2);
if (kWorks(mid)){
r = mid;
}else{
l = mid + 1;
}
}
return l;
};
```
## Explanation
<YouTube id="U2SozAs9RzA" title="Koko Eating Bananas - Binary Search - Leetcode 875 - Python" />
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---
title: Binary Search
description: 'Half of a sorted range is removed at each step until the target is found.'
hidden: true
---
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import { defineMeta } from "blume";
export default defineMeta({ title: "Binary Search", order: 5, icon: "search", display: "group" });