Day-13(Solution):
Subarray Sum Equals K
Leetcode #560
Algorithm: Binary Search, Divide and Conquer
Solution: https://gist.github.com/lavakush-m-tiwari/f842ac136b45619e9b2d8fb09a41b44f
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Subarray Sum Equals K
Leetcode #560
Algorithm: Binary Search, Divide and Conquer
Solution: https://gist.github.com/lavakush-m-tiwari/f842ac136b45619e9b2d8fb09a41b44f
Related Video: https://www.youtube.com/watch?v=HbbYPQc-Oo4
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LeetCode
Subarray Sum Equals K - LeetCode
Can you solve this real interview question? Subarray Sum Equals K - Given an array of integers nums and an integer k, return the total number of subarrays whose sum equals to k.
A subarray is a contiguous non-empty sequence of elements within an array.
…
A subarray is a contiguous non-empty sequence of elements within an array.
…
Day-14
Insert Delete GetRandom O(1)
Leetcode #380
Algorithm: Hash Table, Design, Randomized
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Insert Delete GetRandom O(1)
Leetcode #380
Algorithm: Hash Table, Design, Randomized
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LeetCode
Insert Delete GetRandom O(1) - LeetCode
Can you solve this real interview question? Insert Delete GetRandom O(1) - Implement the RandomizedSet class:
* RandomizedSet() Initializes the RandomizedSet object.
* bool insert(int val) Inserts an item val into the set if not present. Returns true if…
* RandomizedSet() Initializes the RandomizedSet object.
* bool insert(int val) Inserts an item val into the set if not present. Returns true if…
Day-14(Solution):
Insert Delete GetRandom O(1)
Leetcode #380
Algorithm: Binary Search, Divide and Conquer
Solution: https://gist.github.com/lavakush-m-tiwari/090b61231d5b6ad12f88d6c40e57afaa
Related Video: https://www.youtube.com/watch?v=WtkwD7ikxfg
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Insert Delete GetRandom O(1)
Leetcode #380
Algorithm: Binary Search, Divide and Conquer
Solution: https://gist.github.com/lavakush-m-tiwari/090b61231d5b6ad12f88d6c40e57afaa
Related Video: https://www.youtube.com/watch?v=WtkwD7ikxfg
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LeetCode
Insert Delete GetRandom O(1) - LeetCode
Can you solve this real interview question? Insert Delete GetRandom O(1) - Implement the RandomizedSet class:
* RandomizedSet() Initializes the RandomizedSet object.
* bool insert(int val) Inserts an item val into the set if not present. Returns true if…
* RandomizedSet() Initializes the RandomizedSet object.
* bool insert(int val) Inserts an item val into the set if not present. Returns true if…
Day-15
Find Peak Element
Leetcode #162
Algorithm: Binary Search
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Find Peak Element
Leetcode #162
Algorithm: Binary Search
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LeetCode
Find Peak Element - LeetCode
Can you solve this real interview question? Find Peak Element - A peak element is an element that is strictly greater than its neighbors.
Given a 0-indexed integer array nums, find a peak element, and return its index. If the array contains multiple peaks…
Given a 0-indexed integer array nums, find a peak element, and return its index. If the array contains multiple peaks…
Day-15(Solution):
Find Peak Element
Leetcode #162
Algorithm: Binary Search
Solution: https://gist.github.com/lavakush-m-tiwari/f74ef2082e34055d2a04cbd0f06c26aa
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Find Peak Element
Leetcode #162
Algorithm: Binary Search
Solution: https://gist.github.com/lavakush-m-tiwari/f74ef2082e34055d2a04cbd0f06c26aa
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LeetCode
Find Peak Element - LeetCode
Can you solve this real interview question? Find Peak Element - A peak element is an element that is strictly greater than its neighbors.
Given a 0-indexed integer array nums, find a peak element, and return its index. If the array contains multiple peaks…
Given a 0-indexed integer array nums, find a peak element, and return its index. If the array contains multiple peaks…
Day-16
Contains Duplicate
Leetcode #217
Algorithm: Hash Table, Sorting
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Contains Duplicate
Leetcode #217
Algorithm: Hash Table, Sorting
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LeetCode
Contains Duplicate - LeetCode
Can you solve this real interview question? Contains Duplicate - Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct.
Example 1:
Input: nums = [1,2,3,1]
Output: true…
Example 1:
Input: nums = [1,2,3,1]
Output: true…
Day-16(Soultion)
Contains Duplicate
Leetcode #217
Algorithm: Hash Table, Sorting
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Contains Duplicate
Leetcode #217
Algorithm: Hash Table, Sorting
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LeetCode
Contains Duplicate - LeetCode
Can you solve this real interview question? Contains Duplicate - Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct.
Example 1:
Input: nums = [1,2,3,1]
Output: true…
Example 1:
Input: nums = [1,2,3,1]
Output: true…
Day-17
Can Place Flowers
Leetcode #605
Algorithm: Greedy
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Can Place Flowers
Leetcode #605
Algorithm: Greedy
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LeetCode
Can Place Flowers - LeetCode
Can you solve this real interview question? Can Place Flowers - You have a long flowerbed in which some of the plots are planted, and some are not. However, flowers cannot be planted in adjacent plots.
Given an integer array flowerbed containing 0's and…
Given an integer array flowerbed containing 0's and…
Day-17(Solution):
Can Place Flowers
Leetcode #605
Algorithm: Greedy
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Can Place Flowers
Leetcode #605
Algorithm: Greedy
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LeetCode
Can Place Flowers - LeetCode
Can you solve this real interview question? Can Place Flowers - You have a long flowerbed in which some of the plots are planted, and some are not. However, flowers cannot be planted in adjacent plots.
Given an integer array flowerbed containing 0's and…
Given an integer array flowerbed containing 0's and…
Day-18
Find First and Last Position of Element in Sorted Array
Leetcode #34
Algorithm: Binary Search
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Find First and Last Position of Element in Sorted Array
Leetcode #34
Algorithm: Binary Search
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LeetCode
Find First and Last Position of Element in Sorted Array - LeetCode
Can you solve this real interview question? Find First and Last Position of Element in Sorted Array - Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value.
If target is not found in…
If target is not found in…
Day-18(Solution)
Find First and Last Position of Element in Sorted Array
Leetcode #34
Algorithm: Binary Search
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Find First and Last Position of Element in Sorted Array
Leetcode #34
Algorithm: Binary Search
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LeetCode
Find First and Last Position of Element in Sorted Array - LeetCode
Can you solve this real interview question? Find First and Last Position of Element in Sorted Array - Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value.
If target is not found in…
If target is not found in…
Day-19
Next Permutation
Leetcode #31
Algorithm: Two Pointer
Related Video: https://www.youtube.com/watch?v=6qXO72FkqwM
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Next Permutation
Leetcode #31
Algorithm: Two Pointer
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LeetCode
Next Permutation - LeetCode
Can you solve this real interview question? Next Permutation - A permutation of an array of integers is an arrangement of its members into a sequence or linear order.
* For example, for arr = [1,2,3], the following are all the permutations of arr: [1,2…
* For example, for arr = [1,2,3], the following are all the permutations of arr: [1,2…
Day-19 (Solution)
Next Permutation
Leetcode #31
Algorithm: Two Pointer
Solution: https://gist.github.com/lavakush-m-tiwari/176829d915c7b06adf6ef2e65f008419
Related Video: https://www.youtube.com/watch?v=6qXO72FkqwM
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Next Permutation
Leetcode #31
Algorithm: Two Pointer
Solution: https://gist.github.com/lavakush-m-tiwari/176829d915c7b06adf6ef2e65f008419
Related Video: https://www.youtube.com/watch?v=6qXO72FkqwM
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LeetCode
Next Permutation - LeetCode
Can you solve this real interview question? Next Permutation - A permutation of an array of integers is an arrangement of its members into a sequence or linear order.
* For example, for arr = [1,2,3], the following are all the permutations of arr: [1,2…
* For example, for arr = [1,2,3], the following are all the permutations of arr: [1,2…
Day-20
Koko Eating Bananas
Leetcode #875
Algorithm: Binary Search
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Koko Eating Bananas
Leetcode #875
Algorithm: Binary Search
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LeetCode
Koko Eating Bananas - LeetCode
Can you solve this real interview question? Koko Eating Bananas - Koko loves to eat bananas. There are n piles of bananas, the ith pile has piles[i] bananas. The guards have gone and will come back in h hours.
Koko can decide her bananas-per-hour eating…
Koko can decide her bananas-per-hour eating…
Day-20(Solution)
Koko Eating Bananas
Leetcode #875
Algorithm: Binary Search
Solution: https://gist.github.com/lavakush-m-tiwari/d64b9c261f71b6bba37749ac972f4b37
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Koko Eating Bananas
Leetcode #875
Algorithm: Binary Search
Solution: https://gist.github.com/lavakush-m-tiwari/d64b9c261f71b6bba37749ac972f4b37
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LeetCode
Koko Eating Bananas - LeetCode
Can you solve this real interview question? Koko Eating Bananas - Koko loves to eat bananas. There are n piles of bananas, the ith pile has piles[i] bananas. The guards have gone and will come back in h hours.
Koko can decide her bananas-per-hour eating…
Koko can decide her bananas-per-hour eating…
Day-21
Two Sum II - Input Array Is Sorted
Leetcode #167
Algorithm: Binary Search
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Two Sum II - Input Array Is Sorted
Leetcode #167
Algorithm: Binary Search
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LeetCode
Two Sum II - Input Array Is Sorted - LeetCode
Can you solve this real interview question? Two Sum II - Input Array Is Sorted - Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number. Let these two…
Day-21(Solution):
Two Sum II - Input Array Is Sorted
Leetcode #167
Algorithm: Binary Search
Solution: https://gist.github.com/lavakush-m-tiwari/9ddd65ddf2902ff10a5f25d078e5afac
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Two Sum II - Input Array Is Sorted
Leetcode #167
Algorithm: Binary Search
Solution: https://gist.github.com/lavakush-m-tiwari/9ddd65ddf2902ff10a5f25d078e5afac
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LeetCode
Two Sum II - Input Array Is Sorted - LeetCode
Can you solve this real interview question? Two Sum II - Input Array Is Sorted - Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number. Let these two…
Day-22
Shortest Unsorted Continuous Subarray
Leetcode #581
Algorithm: two pointer, Greedy, Sorting
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Shortest Unsorted Continuous Subarray
Leetcode #581
Algorithm: two pointer, Greedy, Sorting
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LeetCode
Shortest Unsorted Continuous Subarray - LeetCode
Can you solve this real interview question? Shortest Unsorted Continuous Subarray - Given an integer array nums, you need to find one continuous subarray such that if you only sort this subarray in non-decreasing order, then the whole array will be sorted…
Day-22(Solution)
Shortest Unsorted Continuous Subarray
Leetcode #581
Algorithm: two pointer, Greedy, Sorting
Solution: https://gist.github.com/lavakush-m-tiwari/32b0423cc25aeca27465859409d22824
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Shortest Unsorted Continuous Subarray
Leetcode #581
Algorithm: two pointer, Greedy, Sorting
Solution: https://gist.github.com/lavakush-m-tiwari/32b0423cc25aeca27465859409d22824
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LeetCode
Shortest Unsorted Continuous Subarray - LeetCode
Can you solve this real interview question? Shortest Unsorted Continuous Subarray - Given an integer array nums, you need to find one continuous subarray such that if you only sort this subarray in non-decreasing order, then the whole array will be sorted…
Day-23
Rotate Array
Leetcode #189
Algorithm: two pointer, Math
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Please try the problem yourself and watch the video to learn the Algorithm 🙂
Please SHARE this initiative with your friends as well 😀
#techdose #28DaysOfArray #interviewpreparation #arrays #dsa #MaxFreqLast6Months #facebook5 #amazon10 #microsoft7 #google3 #apple3
Rotate Array
Leetcode #189
Algorithm: two pointer, Math
Subscribe our Channel : https://www.youtube.com/c/TECHDOSE4u
Follow on Linkedin: https://www.linkedin.com/company/tech-dose
Please try the problem yourself and watch the video to learn the Algorithm 🙂
Please SHARE this initiative with your friends as well 😀
#techdose #28DaysOfArray #interviewpreparation #arrays #dsa #MaxFreqLast6Months #facebook5 #amazon10 #microsoft7 #google3 #apple3
LeetCode
Rotate Array - LeetCode
Can you solve this real interview question? Rotate Array - Given an integer array nums, rotate the array to the right by k steps, where k is non-negative.
Example 1:
Input: nums = [1,2,3,4,5,6,7], k = 3
Output: [5,6,7,1,2,3,4]
Explanation:
rotate 1…
Example 1:
Input: nums = [1,2,3,4,5,6,7], k = 3
Output: [5,6,7,1,2,3,4]
Explanation:
rotate 1…