IBM Interview Questions — CS-Next ByCompany

178 of 178

No.	Problem	Difficulty	Frequency
412	Fizz Buzz	Easy	100.0%
1	Two Sum Sliding Window	Easy	87.5%
3	Longest Substring Without Repeating Characters StringTree	Medium	87.5%
12	Integer to Roman Math	Medium	87.5%
121	Best Time to Buy and Sell Stock	Easy	87.5%
2580	Count Ways to Group Overlapping Ranges	Medium	87.5%
56	Merge Intervals	Medium	87.5%
13	Roman to Integer Math	Easy	75.0%
20	Valid Parentheses Stack/Queue	Easy	75.0%
48	Rotate Image	Medium	75.0%
3107	Minimum Operations to Make Median of Array Equal to K ArrayHeap	Medium	75.0%
3175	Find The First Player to win K Games in a Row	Medium	75.0%
3159	Find Occurrences of an Element in an Array Array	Medium	75.0%
1355	Activity Participants	Medium	75.0%
560	Subarray Sum Equals K Array	Medium	75.0%
2602	Minimum Operations to Make All Array Elements Equal Array	Medium	75.0%
453	Minimum Moves to Equal Array Elements Array	Medium	75.0%
5	Longest Palindromic Substring StringTree	Medium	62.5%
9	Palindrome Number StringMath	Easy	62.5%
17	Letter Combinations of a Phone Number Math	Medium	62.5%
49	Group Anagrams String	Medium	62.5%
2907	Maximum Profitable Triplets With Increasing Prices I	Medium	62.5%
2921	Maximum Profitable Triplets With Increasing Prices II	Hard	62.5%
2964	Number of Divisible Triplet Sums Math	Medium	62.5%
3024	Type of Triangle	Easy	62.5%
1200	Minimum Absolute Difference	Easy	62.5%
3096	Minimum Levels to Gain More Points	Medium	62.5%
3147	Taking Maximum Energy From the Mystic Dungeon	Medium	62.5%
3145	Find Products of Elements of Big Array Array	Hard	62.5%
2455	Average Value of Even Numbers That Are Divisible by Three Math	Easy	62.5%
2545	Sort the Students by Their Kth Score	Medium	62.5%
2562	Find the Array Concatenation Value Array	Easy	62.5%
1710	Maximum Units on a Truck	Easy	62.5%
3223	Minimum Length of String After Operations String	Medium	62.5%
696	Count Binary Substrings StringTree	Easy	62.5%
2972	Count the Number of Incremovable Subarrays II ArrayMath	Hard	62.5%
1319	Number of Operations to Make Network Connected GraphMath	Medium	62.5%
2559	Count Vowel Strings in Ranges String	Medium	62.5%
2734	Lexicographically Smallest String After Substring Operation StringTreeGraph	Medium	62.5%
2461	Maximum Sum of Distinct Subarrays With Length K Array	Medium	62.5%
1888	Minimum Number of Flips to Make the Binary String Alternating StringMath	Medium	62.5%
242	Valid Anagram String	Easy	62.5%
15	3Sum	Medium	62.5%
3402	Minimum Operations to Make Columns Strictly Increasing	Easy	62.5%
724	Find Pivot Index	Easy	62.5%
845	Longest Mountain in Array Array	Medium	62.5%
1004	Max Consecutive Ones III	Medium	62.5%
1518	Water Bottles	Easy	62.5%
754	Reach a Number Math	Medium	62.5%
14	Longest Common Prefix DP	Easy	50.0%
53	Maximum Subarray Array	Medium	50.0%
128	Longest Consecutive Sequence	Medium	50.0%
146	LRU Cache	Medium	50.0%
253	Meeting Rooms II	Medium	50.0%
443	String Compression String	Medium	50.0%
636	Exclusive Time of Functions	Medium	50.0%
98	Validate Binary Search Tree TreeBinary Search	Medium	50.0%
70	Climbing Stairs	Easy	50.0%
844	Backspace String Compare String	Easy	50.0%
54	Spiral Matrix Array	Medium	50.0%
2950	Number of Divisible Substrings StringTreeMath	Medium	50.0%
2506	Count Pairs Of Similar Strings String	Easy	50.0%
2696	Minimum String Length After Removing Substrings StringTree	Easy	50.0%
3295	Report Spam Message	Medium	50.0%
2231	Largest Number After Digit Swaps by Parity Math	Easy	50.0%
1768	Merge Strings Alternately String	Easy	50.0%
1051	Height Checker	Easy	50.0%
217	Contains Duplicate	Easy	50.0%
76	Minimum Window Substring StringTreeSliding Window	Hard	50.0%
1283	Find the Smallest Divisor Given a Threshold	Medium	50.0%
11	Container With Most Water	Medium	50.0%
283	Move Zeroes	Easy	50.0%
1167	Minimum Cost to Connect Sticks	Medium	50.0%
239	Sliding Window Maximum Sliding Window	Hard	50.0%
435	Non-overlapping Intervals	Medium	50.0%
680	Valid Palindrome II String	Easy	50.0%
3627	Maximum Median Sum of Subsequences of Size 3 StringHeap	Medium	50.0%
881	Boats to Save People	Medium	50.0%
1526	Minimum Number of Increments on Subarrays to Form a Target Array ArrayMath	Hard	50.0%
32	Longest Valid Parentheses Stack/Queue	Hard	50.0%
215	Kth Largest Element in an Array ArrayHeap	Medium	50.0%
4	Median of Two Sorted Arrays ArrayHeap	Hard	37.5%
88	Merge Sorted Array Array	Easy	37.5%
169	Majority Element	Easy	37.5%
189	Rotate Array Array	Medium	37.5%
238	Product of Array Except Self Array	Medium	37.5%
1208	Get Equal Substrings Within Budget StringTree	Medium	37.5%
2432	The Employee That Worked on the Longest Task	Easy	37.5%
1395	Count Number of Teams Math	Medium	37.5%
2598	Smallest Missing Non-negative Integer After Operations Math	Medium	37.5%
1834	Single-Threaded CPU	Medium	37.5%
78	Subsets	Medium	37.5%
153	Find Minimum in Rotated Sorted Array ArrayBinary Search	Medium	37.5%
832	Flipping an Image	Easy	37.5%
51	N-Queens	Hard	37.5%
926	Flip String to Monotone Increasing String	Medium	37.5%
2587	Rearrange Array to Maximize Prefix Score Array	Medium	37.5%
2134	Minimum Swaps to Group All 1's Together II	Medium	37.5%
3130	Find All Possible Stable Binary Arrays II Array	Hard	37.5%
2451	Odd String Difference String	Easy	37.5%
2390	Removing Stars From a String String	Medium	37.5%
2406	Divide Intervals Into Minimum Number of Groups Math	Medium	37.5%
268	Missing Number Math	Easy	37.5%
1974	Minimum Time to Type Word Using Special Typewriter	Easy	37.5%
259	3Sum Smaller	Medium	37.5%
1910	Remove All Occurrences of a Substring StringTree	Medium	37.5%
210	Course Schedule II	Medium	37.5%
767	Reorganize String String	Medium	37.5%
2948	Make Lexicographically Smallest Array by Swapping Elements ArrayGraph	Medium	37.5%
200	Number of Islands GraphMath	Medium	37.5%
1752	Check if Array Is Sorted and Rotated ArrayBinary Search	Easy	37.5%
1539	Kth Missing Positive Number Math	Easy	37.5%
206	Reverse Linked List Linked List	Easy	37.5%
451	Sort Characters By Frequency	Medium	37.5%
1413	Minimum Value to Get Positive Step by Step Sum	Easy	37.5%
89	Gray Code	Medium	37.5%
151	Reverse Words in a String String	Medium	37.5%
66	Plus One	Easy	37.5%
67	Add Binary	Easy	37.5%
135	Candy	Hard	37.5%
901	Online Stock Span	Medium	37.5%
33	Search in Rotated Sorted Array ArrayBinary Search	Medium	37.5%
141	Linked List Cycle GraphLinked List	Easy	37.5%
350	Intersection of Two Arrays II Array	Easy	37.5%
79	Word Search	Medium	37.5%
1963	Minimum Number of Swaps to Make the String Balanced StringMath	Medium	37.5%
1163	Last Substring in Lexicographical Order StringTreeGraph	Hard	37.5%
921	Minimum Add to Make Parentheses Valid	Medium	37.5%
35	Search Insert Position Binary Search	Easy	37.5%
45	Jump Game II	Medium	37.5%
475	Heaters	Medium	37.5%
1052	Grumpy Bookstore Owner	Medium	37.5%
23	Merge k Sorted Lists	Hard	37.5%
1802	Maximum Value at a Given Index in a Bounded Array Array	Medium	37.5%
1604	Alert Using Same Key-Card Three or More Times in a One Hour Period	Medium	37.5%
876	Middle of the Linked List Linked List	Easy	37.5%
26	Remove Duplicates from Sorted Array Array	Easy	37.5%
155	Min Stack Stack/Queue	Medium	37.5%
31	Next Permutation	Medium	37.5%
735	Asteroid Collision	Medium	37.5%
2220	Minimum Bit Flips to Convert Number Math	Easy	37.5%
994	Rotting Oranges	Medium	37.5%
322	Coin Change DP	Medium	37.5%
1046	Last Stone Weight	Easy	37.5%
2405	Optimal Partition of String StringDP	Medium	37.5%
71	Simplify Path	Medium	37.5%
2193	Minimum Number of Moves to Make Palindrome StringMath	Hard	37.5%
1685	Sum of Absolute Differences in a Sorted Array Array	Medium	37.5%
1513	Number of Substrings With Only 1s StringTreeMath	Medium	37.5%
387	First Unique Character in a String String	Easy	37.5%
1877	Minimize Maximum Pair Sum in Array Array	Medium	37.5%
2	Add Two Numbers Math	Medium	37.5%
2273	Find Resultant Array After Removing Anagrams ArrayString	Easy	37.5%
42	Trapping Rain Water	Hard	37.5%
1312	Minimum Insertion Steps to Make a String Palindrome String	Hard	37.5%
2429	Minimize XOR	Medium	37.5%
22	Generate Parentheses	Medium	37.5%
485	Max Consecutive Ones	Easy	37.5%
875	Koko Eating Bananas	Medium	37.5%
1758	Minimum Changes To Make Alternating Binary String String	Easy	37.5%
3521	Find Product Recommendation Pairs	Medium	37.5%
647	Palindromic Substrings StringTree	Medium	37.5%
72	Edit Distance DP	Medium	37.5%
371	Sum of Two Integers Math	Medium	37.5%
992	Subarrays with K Different Integers ArrayMath	Hard	37.5%
2402	Meeting Rooms III	Hard	37.5%
75	Sort Colors	Medium	37.5%
152	Maximum Product Subarray Array	Medium	37.5%
1838	Frequency of the Most Frequent Element	Medium	37.5%
191	Number of 1 Bits Math	Easy	37.5%
2116	Check if a Parentheses String Can Be Valid String	Medium	37.5%
202	Happy Number Math	Easy	37.5%
941	Valid Mountain Array Array	Easy	37.5%
413	Arithmetic Slices	Medium	37.5%
2414	Length of the Longest Alphabetical Continuous Substring StringTree	Medium	37.5%
77	Combinations	Medium	37.5%
627	Swap Sex of Employees	Easy	37.5%
134	Gas Station	Medium	37.5%