DSA-Practice

LeetCode Algorithm

#	Title	Solution	Difficulty
1	Two Sum	Python	Easy
2	Add Two Numbers	C	Medium
3	Reverse Integer	C	Easy
4	Happy Number	C	Easy
5	Palindrome Number	C	Easy
6	K-th Largest	Python	Medium
7	Sort Colors	Python	Medium
8	Intersection of two arrays	Python	Easy
9	Intersection of two arrays II	Python	Easy
10	Rotate Array	Python	Medium
11	Summation of two words	Python	Easy
12	Running sum of 1D array	Python	Easy
13	Minimum Deci-Binary	Python	Medium
14	Defanging an IP address	Python	Easy
15	Reducing Dishes	Python	Hard
16	String to Integer	Python	Medium
17	Shuffle the array	Python	Easy
18	Richest Customer Wealth	Python	Easy
19	Smaller than current number	Python	Easy
20	Number of Good Pairs	Python	Easy
21	Subtract Sum and Product of Digits	Python	Easy
22	Number of steps to zero	Python	Easy
23	Shuffle String	Python	Easy
24	Binary to Integer Linked List	Python	Easy
25	Reverse String	C	Easy
26	Linked List Cycle	Python	Easy
27	Decompress Run	Python	Easy
28	Greatest Number of Candies	Python	Easy
29	Jewels and Stones	Python	Easy
30	Design Parking System	Python	Easy
31	Valid Number	Python	Hard
32	Divide Two	Python	Medium
33	Decode XOR array	Python	Easy
34	Target Array	Python	Easy
35	Goal parser	Python	Easy
36	Consistent Arrays	Python	Easy
37	Count Matching Items	Python	Easy
38	Hamming Distance	Python	Easy
39	Shortest Distance to character	Python	Easy
40	Split a balanced string	Python	Easy
41	XOR on array	Python	Easy
42	BST to Greater Sum	Python	Medium
43	Range Sum of BST	Python	Easy
44	Maximum nesting	Python	Easy
45	Pangram checker	Python	Easy
46	To lowercase	Python	Easy
47	Reformat Department Table	MySQL	Easy
48	Fizz Buzz	Python	Easy
49	Sum without add	Python	Medium
50	N-ary Preorder	Python	Easy
51	Binary Preorder	Python	Easy
52	Even Digits count	Python	Easy
53	Sort Array by Parity	Python	Easy
54	Monotonic Array	Python	Easy
55	No students lunch	Python	Easy
56	Squares of sorted array	Python	Easy
57	Merge Strings Alteratively	Python	Easy
58	Third Maximum Number	Python	Easy
59	Power x-n	Python	Medium
60	Flipping an Image	Python	Easy
61	Fibonacci Number	Python	Easy
62	Minimum Operations to make equal	Python	Medium
63	Count Good Triplets	CPP	Easy
64	Replace Digits with characters	Python	Easy
65	Average Salary -(min,max)	Python	Easy
66	Sort array by increasing frequency	Python	Easy
67	Maximum 69	Python	Easy
68	Height Checker	Python	Easy
69	Replace greatest on right side	Python	Easy
70	Truncate Sentence	Python	Easy
71	Inverse Binary Tree	Python	Easy
72	Halves alike in string	Python	Easy
73	Valid Parentheses	Python	Easy
74	Highest Altitude	Python	Easy
75	Deepest Leaves	Python	Medium
76	Missing Number	Python	Easy
77	Matrix Diagonal Sum	Python	Easy
78	Generate String	Python	Easy
79	Element 25% occurrence	Python	Easy
80	Maximum Product of Two	Python	Easy
81	Number of Students Doing Homework	Python	Easy
82	Reverse Linked List	Python	Easy
83	N unique integer sum 0	Python	Easy
84	Largest atleast twice	Python	Easy
85	Consecutive sum count	Python	Hard
86	Self Dividing Numbers	Python	Easy
87	Merge Two Binary Trees	Python	Easy
88	Count Negative Number	Python	Easy
89	Sum of Base	Python	Easy
90	Count Bits List	Python	Easy
91	Sort integer by power value	Python	Medium
92	Inorder Traversal	Python	Easy
93	Minimum Operations to move all to one box -IMP	Python	Medium
94	Array Partition I	Python	Easy
95	Make array strictly increasing-minimum operations	Python	Easy
96	Sum of Unique numbers	Python	Easy
97	Count Balls	Python	Easy
98	Lucky Number	Python	Easy
99	Maximum Depth of Tree	Python	Easy
100	First Unique Character Index	Python	Easy
101	Number of 1's in Binary	Python	Easy
102	Check if two strings are equivalent	Python	Easy
103	Search a Binary Tree	Python	Easy
104	N-ary Postorder	Python	Easy
105	Di string match	Python	Easy
106	Valid Parentheses -Hard	Python	Medium
107	Excel Column -Hard	Python	Easy
108	Longest Common Prefix -Hard	Python	Easy
109	Valid Phone Number -Hard	Bash	Easy
110	Roman to Integer	Python	Easy
111	Integer to Roman --Imp	Python	Medium
112	Remove Duplicates Sorted Array	Python	Easy
113	Search Insert Position	Python	Easy
114	First Bad Version	Python	Easy
115	Add Binary	Python	Easy
116	Find Town Judge	Python	Easy
117	Implement strStr()	Python	Easy
118	Peak Index- Binary	Python	Easy
119	Same Tree	Python	Easy
120	Length of last Word	Python	Easy
121	Plus One	Python	Easy
122	Remove Element	Python	Easy
123	Remove Duplicates	Python	Easy
124	Permutations-- hard	Python	Medium
125	Climb Stairs	Python	Easy-DP
126	Lowest Common Ancestor-- hard	Python	Medium
127	Longest Substring-- hard	Python	Medium
128	Add Strings	Python	Easy
129	Contains Duplicate	Python	Easy
130	Valid Anagram	Python	Easy
131	Minimize Product Sum of Two	Python	Medium
132	Group Anagrams --refer	Python	Medium
133	Gray Code --refer	Python	Medium
134	Single Number	Python	Easy
135	Valid Palindrome	Python	Easy
136	Remove Vowels	Python	Easy
137	Find K closest --refer	Python	Medium
138	Best time to sell	Python	Easy
139	Maximum Points Cards	Python	Medium
140	Largest Number	Python	Medium
141	Count Primes	Python	Easy
142	Remove Linked List elements	Python	Easy
143	Sort by Character Frequency	Python	Medium
144	Sort List	Python	Medium
145	Sorted Array to BST	Python	Easy
146	Merge Sorted Arrays	Python	Easy
147	Remove Nth node	Python	Medium
148	Asteroid Collision --Google OA	Python	Medium
149	Find Peak Element- O(logn)	Python	Medium
150	Balanced Binary Tree	Python	Easy
151	Sort Array- O(logn)	Python	Medium
152	Symmetric Binary Tree	Python	Easy
153	Move Zeroes	Python	Easy
154	Container with most water	Python	Medium
155	Repeated Pattern	Python	Easy
156	First and last position-- O(logn)	Python	Medium
157	Maximum Sum Sub-array	Python	Easy
158	Maximum Prduct Subarray	Python	Medium
159	Maximum Product of 3	Python	Easy
160	Unique Occurences	Python	Easy
161	Rotate List	Python	Medium
162	Robot return to origin	Python	Easy
163	Shuffling-Fischer yates	Python	Medium
164	Next Greater Element I	Python	Easy
165	Stack with 2 queues	Python	Easy
166	Frogs croak	Python	Medium
167	Spiral Matrix	Python	Medium
168	Shortest Distance to word	Python	Easy
169	Reverse Words in String	Python	Medium
170	Find Pivot Index	Python	Easy
171	Check if majority	Python	Easy
172	Number of equal dominoes	Python	Easy
173	Construct K palindrome strings	Python	Medium
174	Verify Alien Language	Python	Easy
175	Queue with Stack	Python	Easy
176	Design Hashset	Python	Easy
177	Insert to BST	Python	Medium
178	Delete BST	Python	Medium
179	Closest to BST	Python	Easy
180	Count nodes complete tree	Python	Medium
181	Relative sort	Python	Easy
182	Best time to buy and sell II	Python	Easy
183	Square root	Python	Easy
184	Merge Sort Array	Python	Easy
185	Min Stack	Python	Easy
186	Validate BST	Python	Medium
187	Perfect Number	Python	Easy
188	Maximum Consecutive Ones	Python	Easy
189	Build Array from Permutation	Python	Easy
190	Concatenate Array	Python	Easy
191	Disappeared Numbers	Python	Easy

HackerRank

#	Title	Solution	Difficulty
1	Capitalize each word	Python	Easy
2	Sales by match	Python	Easy

Practice

#	Title	Solution	Difficulty
1	Reverse Array	C	Easy
2	Min-Max of Array	C	Easy
3	Sorting Algorithms-Heap,Bubble,Selection	Python	Easy
4	Rightmost non-zero	Python	Easy