Day-6:
Merge Intervals
Leetcode #56
Algorithm: Sorting, Greedy
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Merge Intervals
Leetcode #56
Algorithm: Sorting, Greedy
Please try the problem yourself and watch the video to learn the Algorithm 🙂
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LeetCode
Merge Intervals - LeetCode
Can you solve this real interview question? Merge Intervals - Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals that cover all the intervals in the input.…
Day-6(Solution):
Merge Intervals
Leetcode #56
Algorithm: Sorting, Greedy
Solution: https://gist.github.com/lavakush-m-tiwari/d03acb4d50995283cab447198559184d
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Merge Intervals
Leetcode #56
Algorithm: Sorting, Greedy
Solution: https://gist.github.com/lavakush-m-tiwari/d03acb4d50995283cab447198559184d
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Day-7
Maximum Subarray
Leetcode #53
Algorithm: Divide and Conquer, Kadane's Algorithm
Related Video: https://www.youtube.com/watch?v=YxuK6A3SvTs
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Maximum Subarray
Leetcode #53
Algorithm: Divide and Conquer, Kadane's Algorithm
Related Video: https://www.youtube.com/watch?v=YxuK6A3SvTs
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Day-7 (Solution):
Maximum Subarray
Leetcode #53
Algorithm: Divide and Conquer, Kadane's Algorithm
Related Video: https://www.youtube.com/watch?v=YxuK6A3SvTs
Solution: https://gist.github.com/lavakush-m-tiwari/b7ad03bddd47b7c5cf70b2c691016109
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Maximum Subarray
Leetcode #53
Algorithm: Divide and Conquer, Kadane's Algorithm
Related Video: https://www.youtube.com/watch?v=YxuK6A3SvTs
Solution: https://gist.github.com/lavakush-m-tiwari/b7ad03bddd47b7c5cf70b2c691016109
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Day-8
Search Insert Position
Leetcode #35
Algorithm: Binary Search
Related Video: https://www.youtube.com/watch?v=0A40XJH_VvE
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Search Insert Position
Leetcode #35
Algorithm: Binary Search
Related Video: https://www.youtube.com/watch?v=0A40XJH_VvE
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Day-8(Solution):
Search Insert Position
Leetcode #55
Algorithm: Binary Search
Related Video: https://www.youtube.com/watch?v=0A40XJH_VvE
Solution: https://gist.github.com/lavakush-m-tiwari/8c9d94233c21d00b7dd945284d7cb081
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Search Insert Position
Leetcode #55
Algorithm: Binary Search
Related Video: https://www.youtube.com/watch?v=0A40XJH_VvE
Solution: https://gist.github.com/lavakush-m-tiwari/8c9d94233c21d00b7dd945284d7cb081
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Day-9
Least Number of Unique Integers after K Removals
Leetcode #1481
Algorithm: Hash Table, Counting, Sorting
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Least Number of Unique Integers after K Removals
Leetcode #1481
Algorithm: Hash Table, Counting, Sorting
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LeetCode
Least Number of Unique Integers after K Removals - LeetCode
Can you solve this real interview question? Least Number of Unique Integers after K Removals - Given an array of integers arr and an integer k. Find the least number of unique integers after removing exactly k elements.
Example 1:
Input: arr = [5,5…
Example 1:
Input: arr = [5,5…
Day-9(Solution):
Least Number of Unique Integers after K Removals
Leetcode #1481
Algorithm: Hash Table, Counting, Sorting
Solution: https://gist.github.com/lavakush-m-tiwari/ce5e5682f4370e12b330131185b1db2a
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Least Number of Unique Integers after K Removals
Leetcode #1481
Algorithm: Hash Table, Counting, Sorting
Solution: https://gist.github.com/lavakush-m-tiwari/ce5e5682f4370e12b330131185b1db2a
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Day-10
Search in Rotated Sorted Array
Leetcode #33
Algorithm: Binary Search
Related Video: https://www.youtube.com/watch?v=oTfPJKGEHcc
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Search in Rotated Sorted Array
Leetcode #33
Algorithm: Binary Search
Related Video: https://www.youtube.com/watch?v=oTfPJKGEHcc
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LeetCode
Search in Rotated Sorted Array - LeetCode
Can you solve this real interview question? Search in Rotated Sorted Array - There is an integer array nums sorted in ascending order (with distinct values).
Prior to being passed to your function, nums is possibly left rotated at an unknown index k (1 <=…
Prior to being passed to your function, nums is possibly left rotated at an unknown index k (1 <=…
DSA LIVE course starting on 19th February.
1. US Timezone (7 AM PST)
2. India TImezone (1:30 PM IST)
Whatsapp: +91 8918633037
DSA High Level Plan (Coursework)
• Time complexity analysis
• Math Algos
• Bit manipulation
• Array
• Stack
• Monotonic stack and patterns
• Queue
• Hash
• Heap
• String Algorithms
• Greedy Algo
• Linked List
• Backtracking
• Trees
• AVL
• Dynamic Programming
• Graph algorithms
• Trie
• Segment tree
• Reservoir Sampling
• Geometric Algorithms
• Convex Hull
Course Features:-
• Guarantees to maximize interview result in minimum time
• Guaranteed Understanding of Concepts
• Interview preparation in 3 months guaranteed
• Timing: Sat,Sun
• Assignment problems : 200+ handpicked problems most frequent interview problems across all DSA topics (All problems will be discussed in class after DSA topics)
• LIVE classes (with doubt clearing)
• All lectures are recorded
• Lecture validity: 1 year from start of class
1. US Timezone (7 AM PST)
2. India TImezone (1:30 PM IST)
Whatsapp: +91 8918633037
DSA High Level Plan (Coursework)
• Time complexity analysis
• Math Algos
• Bit manipulation
• Array
• Stack
• Monotonic stack and patterns
• Queue
• Hash
• Heap
• String Algorithms
• Greedy Algo
• Linked List
• Backtracking
• Trees
• AVL
• Dynamic Programming
• Graph algorithms
• Trie
• Segment tree
• Reservoir Sampling
• Geometric Algorithms
• Convex Hull
Course Features:-
• Guarantees to maximize interview result in minimum time
• Guaranteed Understanding of Concepts
• Interview preparation in 3 months guaranteed
• Timing: Sat,Sun
• Assignment problems : 200+ handpicked problems most frequent interview problems across all DSA topics (All problems will be discussed in class after DSA topics)
• LIVE classes (with doubt clearing)
• All lectures are recorded
• Lecture validity: 1 year from start of class
Day-10(Solution):
Search in Rotated Sorted Array
Leetcode #33
Algorithm: Binary Search
Solution: https://gist.github.com/lavakush-m-tiwari/3b08d42985eae721f2f10c41443d93cb
Related Video: https://www.youtube.com/watch?v=oTfPJKGEHcc
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Search in Rotated Sorted Array
Leetcode #33
Algorithm: Binary Search
Solution: https://gist.github.com/lavakush-m-tiwari/3b08d42985eae721f2f10c41443d93cb
Related Video: https://www.youtube.com/watch?v=oTfPJKGEHcc
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LeetCode
Search in Rotated Sorted Array - LeetCode
Can you solve this real interview question? Search in Rotated Sorted Array - There is an integer array nums sorted in ascending order (with distinct values).
Prior to being passed to your function, nums is possibly left rotated at an unknown index k (1 <=…
Prior to being passed to your function, nums is possibly left rotated at an unknown index k (1 <=…
Day-10
Bus Routes
Leetcode #815
Algorithm: Hash Table
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Bus Routes
Leetcode #815
Algorithm: Hash Table
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LeetCode
Bus Routes - LeetCode
Can you solve this real interview question? Bus Routes - You are given an array routes representing bus routes where routes[i] is a bus route that the ith bus repeats forever.
* For example, if routes[0] = [1, 5, 7], this means that the 0th bus travels…
* For example, if routes[0] = [1, 5, 7], this means that the 0th bus travels…
Day-10(Solution)
Bus Routes
Leetcode #815
Algorithm: Hash Table
Solution: https://gist.github.com/lavakush-m-tiwari/206c4edd6bace93e9c2e4c34c62c443f
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Bus Routes
Leetcode #815
Algorithm: Hash Table
Solution: https://gist.github.com/lavakush-m-tiwari/206c4edd6bace93e9c2e4c34c62c443f
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Day-11
Top K Frequent Elements
Leetcode #347
Algorithm: Hash Table, Divide and Conquer, Sorting, Counting, Bucket Sort, Quick Select
Related Video: https://www.youtube.com/watch?v=BP7GCALO2v8
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Top K Frequent Elements
Leetcode #347
Algorithm: Hash Table, Divide and Conquer, Sorting, Counting, Bucket Sort, Quick Select
Related Video: https://www.youtube.com/watch?v=BP7GCALO2v8
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LeetCode
Top K Frequent Elements - LeetCode
Can you solve this real interview question? Top K Frequent Elements - Given an integer array nums and an integer k, return the k most frequent elements. You may return the answer in any order.
Example 1:
Input: nums = [1,1,1,2,2,3], k = 2
Output: [1…
Example 1:
Input: nums = [1,1,1,2,2,3], k = 2
Output: [1…
Day-11(Solution):
Top K Frequent Elements
Leetcode #347
Algorithm: Hash Table, Divide and Conquer, Sorting, Counting, Bucket Sort, Quick Select
Solution: https://gist.github.com/lavakush-m-tiwari/ab6aa6b9c3104c5a6039caae8239c5e3
Related Video: https://www.youtube.com/watch?v=BP7GCALO2v8
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Top K Frequent Elements
Leetcode #347
Algorithm: Hash Table, Divide and Conquer, Sorting, Counting, Bucket Sort, Quick Select
Solution: https://gist.github.com/lavakush-m-tiwari/ab6aa6b9c3104c5a6039caae8239c5e3
Related Video: https://www.youtube.com/watch?v=BP7GCALO2v8
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Day-12
Median of Two Sorted Arrays
Leetcode #4
Algorithm: Binary Search, Divide and Conquer
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Median of Two Sorted Arrays
Leetcode #4
Algorithm: Binary Search, Divide and Conquer
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LeetCode
Median of Two Sorted Arrays - LeetCode
Can you solve this real interview question? Median of Two Sorted Arrays - Given two sorted arrays nums1 and nums2 of size m and n respectively, return the median of the two sorted arrays.
The overall run time complexity should be O(log (m+n)).
Example…
The overall run time complexity should be O(log (m+n)).
Example…
Day-12(Solution)
Median of Two Sorted Arrays
Leetcode #4
Algorithm: Binary Search, Divide and Conquer
Solution: https://gist.github.com/lavakush-m-tiwari/0830f1decabace8bb8c4ab2eb81729e4
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Median of Two Sorted Arrays
Leetcode #4
Algorithm: Binary Search, Divide and Conquer
Solution: https://gist.github.com/lavakush-m-tiwari/0830f1decabace8bb8c4ab2eb81729e4
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LeetCode
Median of Two Sorted Arrays - LeetCode
Can you solve this real interview question? Median of Two Sorted Arrays - Given two sorted arrays nums1 and nums2 of size m and n respectively, return the median of the two sorted arrays.
The overall run time complexity should be O(log (m+n)).
Example…
The overall run time complexity should be O(log (m+n)).
Example…
Day-13
Subarray Sum Equals K
Leetcode #560
Algorithm: Binary Search, Divide and Conquer
Related Video: https://www.youtube.com/watch?v=HbbYPQc-Oo4
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Subarray Sum Equals K
Leetcode #560
Algorithm: Binary Search, Divide and Conquer
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-13(Solution):
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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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
Related Video: https://www.youtube.com/watch?v=WtkwD7ikxfg
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Insert Delete GetRandom O(1)
Leetcode #380
Algorithm: Hash Table, Design, Randomized
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…