Array problems

149 Array problems on CampusCode, in order. Open any for its full statement, examples and constraints.

1. Print Array Elements Easy
2. Find Maximum Element in Array Easy
3. Reverse an Array Easy
4. Check if Array is Sorted Easy
5. Remove Duplicates from Sorted Array Easy
6. Find the Missing Number Easy
7. Move Zeros to End Easy
8. Rotate Array by K Steps Easy
9. Find Second Largest Element Easy
10. Merge Two Sorted Arrays Easy
11. Count Even and Odd Numbers Easy
12. Intersection of Two Arrays Easy
13. Find All Duplicates in Array Easy
14. Find Minimum in Array Easy
15. Single Number (XOR Trick) Easy
16. Plus One Easy
17. Pascal's Triangle Row Easy
18. Contains Duplicate Easy
19. Best Time to Buy and Sell Stock Easy
20. Find the Pivot Index Easy
21. How Many Numbers Are Smaller Than Current Easy
22. Shuffle the Array Easy
23. Running Sum of 1D Array Easy
24. Find Numbers with Even Number of Digits Easy
25. Squares of a Sorted Array Easy
26. Check if N and Its Double Exist Easy
27. Third Maximum Number Easy
28. Find All Numbers Disappeared in Array Easy
29. Height Checker Easy
30. Sum of All Odd Length Subarrays Easy
31. Kids With the Greatest Number of Candies Easy
32. Decompress Run-Length Encoded List Easy
33. Replace Elements with Greatest Element on Right Easy
34. Maximum Product of Two Elements in an Array Easy
35. Concatenation of Array Easy
36. Build Array from Permutation Easy
37. Richest Customer Wealth Easy
38. Find the Highest Altitude Easy
39. Count Items Matching a Rule Easy
40. Find Center of Star Graph Easy
41. Flipping an Image Easy
42. Transpose Matrix Easy
43. Toeplitz Matrix Easy
44. Find Common Elements Between Two Arrays Easy
45. Count Good Pairs Easy
46. Number of Rectangles That Can Form Largest Square Easy
47. Average Salary Excluding Min and Max Easy
48. Find Smallest Letter Greater Than Target Easy
49. Matrix Diagonal Sum Easy
50. Sort Array by Parity Easy
51. Minimum Value to Get Positive Step by Step Sum Easy
52. Maximum Average Subarray I Easy
53. Largest Number At Least Twice of Others Easy
54. Max Consecutive Ones Easy
55. Left and Right Sum Differences Easy
56. Find Target Indices After Sorting Array Easy
57. Sum of Absolute Differences in Sorted Array Easy
58. Lucky Number in a Matrix Easy
59. Find the Array Concatenation Value Easy
60. Minimum Difference Between Highest and Lowest of K Scores Easy
61. Two Sum Easy
62. Three Sum Medium
63. Product of Array Except Self Medium
64. Subarray Sum Equals K Medium
65. Longest Subarray with Sum K Medium
66. Rotate Image (90 Degrees) Medium
67. Spiral Matrix Traversal Medium
68. Jump Game Medium
69. Container With Most Water Medium
70. Merge Intervals Medium
71. Insert Interval Medium
72. Sort Colors (Dutch National Flag) Medium
73. Find the Duplicate Number Medium
74. Maximum Subarray (Kadane's Algorithm) Medium
75. Longest Consecutive Sequence Medium
76. Set Matrix Zeroes Medium
77. Search in Rotated Sorted Array Medium
78. Find Peak Element Medium
79. Two Sum II - Input Array Is Sorted Medium
80. Minimum Size Subarray Sum Medium
81. Maximum Product Subarray Medium
82. Increasing Triplet Subsequence Medium
83. Next Permutation Medium
84. Partition Array into Disjoint Intervals Medium
85. Minimum Number of Arrows to Burst Balloons Medium
86. Subsets Medium
87. Permutations Medium
88. Combination Sum Medium
89. Find First and Last Position of Element in Sorted Array Medium
90. Game of Life Medium
91. Summary Ranges Medium
92. 3Sum Closest Medium
93. 4Sum Medium
94. Maximum Points You Can Obtain from Cards Medium
95. Minimum Difference Between Largest and Smallest in Three Moves Medium
96. Max Number of K-Sum Pairs Medium
97. Count Number of Nice Subarrays Medium
98. Longest Mountain in Array Medium
99. Minimum Operations to Reduce X to Zero Medium
100. Maximum Width Ramp Medium
101. Find the Duplicate Number (Floyd's Cycle Detection) Medium
102. Array Nesting Medium
103. Shortest Unsorted Continuous Subarray Medium
104. Wiggle Sort II Medium
105. Trapping Rain Water Medium
106. Subarray Product Less Than K Medium
107. Minimum Path Sum Medium
108. Jump Game II Medium
109. Largest Rectangle in Histogram Medium
110. Median of Two Sorted Arrays Hard
111. First Missing Positive Hard
112. Best Time to Buy and Sell Stock III Hard
113. Sliding Window Maximum Hard
114. Candy Hard
115. Count of Smaller Numbers After Self Hard
116. Reverse Pairs Hard
117. Maximum Sum of 3 Non-Overlapping Subarrays Hard
118. Burst Balloons Hard
119. Best Time to Buy and Sell Stock IV Hard
120. Count of Range Sum Hard
121. Maximum Gap Hard
122. Shortest Subarray with Sum at Least K Hard
123. Count Inversions in Array Hard
124. Remove Boxes Hard
125. Candy Distribution Hard
126. Jump Game II (Minimum Jumps) Hard
127. Minimum Number of Refueling Stops Hard
128. Minimum Interval to Include Each Query Hard
129. Max Value of Equation Hard
130. Find K-th Smallest Pair Distance Hard
131. Find Minimum in Rotated Sorted Array II Hard
132. Patching Array Hard
133. Create Maximum Number Hard
134. Split Array Largest Sum Hard
135. Allocate Books (Binary Search + Greedy) Hard
136. Aggressive Cows Hard
137. Number of Subarrays with Bounded Maximum Hard
138. Minimum Cost to Hire K Workers Hard
139. Maximum Performance of a Team Hard
140. Minimize Max Distance to Gas Station Hard
141. Swim in Rising Water Hard
142. Minimum Moves to Equal Array Elements II Hard
143. Range Sum Query 2D Hard
144. Count Rectangles with All Ones Hard
145. Maximum Rectangle in Binary Matrix Hard
146. Shortest Common Supersequence via Array DP Hard
147. Strange Printer (Array Encoding) Hard
148. K-th Largest Element in a Stream (Array Variant) Hard
149. Minimum Window Subarray with All Distinct Elements Hard