🧩 LeetCode Solutions by Hardik Runwal

This repository contains my solutions to various LeetCode problems.
All solutions are written in a clean, easy-to-understand style — some in Python, some in Java, depending on the problem.

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📚 Index of Solutions

#	Question ID	Question Name	Problem	Solution
1	1	1 Two Sum	Problem	two-sum.java
2	100	100 Same Tree	Problem	same-tree.py
3	104	104 Maximum Depth Of Binary Tree	Problem	maximum-depth-of-binary-tree.py
4	1064	1064 Smallest Integer Divisible By K	Problem	smallest-integer-divisible-by-k.py
5	1071	1071 Binary Prefix Divisible By 5	Problem	-
6	108	108 Convert Sorted Array To Binary Search Tree	Problem	convert-sorted-array-to-binary-search-tree.cpp
7	11	11 Container With Most Water	Problem	container-with-most-water.py
8	1127	1127 Last Stone Weight	Problem	last-stone-weight.cpp
9	118	118 Pascal'Striangle	-	View Code
10	1205	1205 Defanging An Ip Address	Problem	defanging-an-ip-address.py
11	121	121 Best Time To Buy And Sell Stock	Problem	best-time-to-buy-and-sell-stock.java
12	125	125 Validpalindrome	-	View Code
13	1266	1266 Minimumtimevisitingallpoints	-	View Code
14	1353	1353 Find Resultant Array After Removing Anagrams	Problem	find-resultant-array-after-removing-anagrams.java find-resultant-array-after-removing-anagrams.py
15	136	136 Single Number	Problem	single-number.java
16	1365	1365 Howmanynumbersaresmallerthanthecurrentnumber	-	View Code
17	1388	1388 Greatest Sum Divisible By Three	Problem	greatest-sum-divisible-by-three.py
18	1395	1395 Minimum Time Visiting All Points	Problem	minimum-time-visiting-all-points.cpp
19	13	13 Romantointeger	-	View Code
20	1402	1402 Count Square Submatrices With All Ones	Problem	count-square-submatrices-with-all-ones.py
21	141	141 Linked List Cycle	Problem	-
22	142	142 Linked List Cycle Ii	Problem	-
23	143	143 Reorder List	Problem	-
24	144	144 Binary Tree Preorder Traversal	Problem	-
25	1440	1440 Convert Integer To The Sum Of Two No Zero Integers	Problem	convert-integer-to-the-sum-of-two-no-zero-integers.py
26	1448	1448 Maximum 69 Number	Problem	maximum-69-number.py
27	148	148 Sort List	Problem	-
28	1482	1482 How Many Numbers Are Smaller Than The Current Number	Problem	how-many-numbers-are-smaller-than-the-current-number.cpp
29	149	149 Max Points On A Line	Problem	max-points-on-a-line.py
30	14	14 Longestcommonprefix	-	View Code
31	15	15 3Sum	Problem	3sum.py
32	150	150 Evaluatereversepolishnotation	-	View Code
33	153	153 Find Minimum In Rotated Sorted Array	Problem	find-minimum-in-rotated-sorted-array.py
34	1552	1552 Build An Array With Stack Operations	Problem	build-an-array-with-stack-operations.cpp
35	155	155 Minstack	-	View Code
36	1570	1570 Final Prices With A Special Discount In A Shop	Problem	-
37	1580	1580 Shuffle The Array	Problem	shuffle-the-array.cpp
38	160	160 Intersection Of Two Linked Lists	Problem	-
39	1603	1603 Running Sum Of 1D Array	Problem	running-sum-of-1d-array.py
40	1635	1635 Number Of Good Pairs	Problem	number-of-good-pairs.py
41	167	167 Twosum Ii Inputarrayissorted	-	View Code
42	169	169 Majority Element	Problem	majority-element.java
43	172	172 Factorialtrailingzeroes	-	View Code
44	1742	1742 Widest Vertical Area Between Two Points Containing No Points	Problem	widest-vertical-area-between-two-points-containing-no-points.py
45	1791	1791 Richest Customer Wealth	Problem	richest-customer-wealth.py
46	1797	1797 Goal Parser Interpretation	Problem	goal-parser-interpretation.py
47	17	17 Lettercombinationsofaphonenumber	-	View Code
48	1802	1802 Number Of Students Unable To Eat Lunch	Problem	number-of-students-unable-to-eat-lunch.cpp
49	1806	1806 Count Of Matches In Tournament	Problem	count-of-matches-in-tournament.py
50	1817	1817 Calculate Money In Leetcode Bank	Problem	calculate-money-in-leetcode-bank.py
51	189	189 Rotate Array	Problem	rotate-array.py
52	1895	1895 Minimum Number Of Operations To Move All Balls To Each Box	Problem	minimum-number-of-operations-to-move-all-balls-to-each-box.py
53	19	19 Remove Nth Node From End Of List	Problem	-
54	1	1 Twosum	-	View Code
55	2	2 Add Two Numbers	Problem	-
56	202	202 Happy Number	Problem	happy-number.py
57	2037	2037 Count Square Sum Triples	Problem	count-square-sum-triples.py
58	2048	2048 Build Array From Permutation	Problem	build-array-from-permutation.py
59	205	205 Isomorphic Strings	Problem	isomorphic-strings.py
60	2050	2050 Count Good Numbers	Problem	count-good-numbers.py
61	2058	2058 Concatenation Of Array	Problem	-
62	206	206 Reverse Linked List	Problem	-
63	20	20 Validparentheses	-	View Code
64	2137	2137 Final Value Of Variable After Performing Operations	Problem	final-value-of-variable-after-performing-operations.py
65	217	217 Containsduplicates	-	View Code
66	2195	2195 Time Needed To Buy Tickets	Problem	time-needed-to-buy-tickets.cpp
67	21	21 Mergetwosortedlists	-	View Code
68	2216	2216 Delete The Middle Node Of A Linked List	Problem	-
69	2219	2219 Maximum Number Of Words Found In Sentences	Problem	maximum-number-of-words-found-in-sentences.py
70	223	223 Rectangle Area	Problem	rectangle-area.py
71	2244	2244 Number Of Laser Beams In A Bank	Problem	number-of-laser-beams-in-a-bank.py
72	2264	2264 Largest3Samedigitnumberinstring	-	View Code
73	2265	2265 Partition Array According To Given Pivot	Problem	partition-array-according-to-given-pivot.py
74	2271	2271 Rearrange Array Elements By Sign	Problem	rearrange-array-elements-by-sign.java
75	2274	2274 Keep Multiplying Found Values By Two	Problem	keep-multiplying-found-values-by-two.py
76	229	229 Majority Element Ii	Problem	majority-element-ii.py
77	232	232 Implement Queue Using Stacks	Problem	implement-queue-using-stacks.cpp
78	234	234 Palindrome Linked List	Problem	-
79	237	237 Delete Node In A Linked List	Problem	-
80	238	238 Productofarrayexceptself	-	View Code
81	2396	2396 Strictlypalindromicnumber	-	View Code
82	2423	2423 Removelettertoequalizefrequency	-	View Code
83	242	242 Validanagram	-	View Code
84	2491	2491 Smallest Even Multiple	Problem	smallest-even-multiple.py
85	2556	2556 Convert The Temperature	Problem	convert-the-temperature.py
86	2591	2591 Distributemoneytomaximumchildren	-	View Code
87	26	26 Remove Duplicates From Sorted Array	Problem	remove-duplicates-from-sorted-array.py
88	2631	2631 Sort The Students By Their Kth Score	Problem	sort-the-students-by-their-kth-score.py
89	268	268 Missingnumbers	-	View Code
90	27	27 Remove Element	Problem	remove-element.java
91	2714	2714 Left And Right Sum Differences	Problem	left-and-right-sum-differences.py
92	2724	2724 Convert An Array Into A 2D Array With Conditions	Problem	convert-an-array-into-a-2d-array-with-conditions.py
93	28	28 Find The Index Of The First Occurrence In A String	Problem	find-the-index-of-the-first-occurrence-in-a-string.py
94	2812	2812 Find The Maximum Achievable Number	Problem	find-the-maximum-achievable-number.py
95	283	283 Move Zeroes	Problem	move-zeroes.java
96	2894	2894 Divisibleandnondivisiblesumsdifference	-	View Code
97	29	29 Divide Two Integers	Problem	divide-two-integers.py
98	2903	2903 Insert Greatest Common Divisors In Linked List	Problem	-
99	2917	2917 Count Pairs Whose Sum Is Less Than Target	Problem	count-pairs-whose-sum-is-less-than-target.py
100	31	31 Next Permutation	Problem	next-permutation.py
101	3110	3110 Scoreofastring	-	View Code
102	312	312 Burst Balloons	Problem	burst-balloons.py
103	3194	3194 Find Words Containing Character	Problem	find-words-containing-character.py
104	324	324 Wigglesortii	-	View Code
105	3251	3251 Maximum Area Of Longest Diagonal Rectangle	Problem	maximum-area-of-longest-diagonal-rectangle.java
106	328	328 Odd Even Linked List	Problem	-
107	33	33 Search In Rotated Sorted Array	Problem	search-in-rotated-sorted-array.py
108	3371	3371 Harshad Number	Problem	harshad-number.py
109	34	34 Find First And Last Position Of Element In Sorted Array	Problem	find-first-and-last-position-of-element-in-sorted-array.py
110	342	342 Power Of Four	Problem	power-of-four.py
111	342	342 Poweroffour	-	View Code
112	3446	3446 Find The Number Of Good Pairs I	Problem	find-the-number-of-good-pairs-i.py
113	3476	3476 Find Minimum Operations To Make All Elements Divisible By Three	Problem	find-minimum-operations-to-make-all-elements-divisible-by-three.py
114	347	347 Topkfrequentelements	-	View Code
115	3567	3567 Convert Date To Binary	Problem	convert-date-to-binary.py
116	3581	3581 The Two Sneaky Numbers Of Digitville	Problem	the-two-sneaky-numbers-of-digitville.py
117	3582	3582 Find Indices Of Stable Mountains	Problem	find-indices-of-stable-mountains.py
118	373	373 Find K Pairs With Smallest Sums	Problem	find-k-pairs-with-smallest-sums.cpp
119	3748	3748 Sort Matrix By Diagonals	Problem	sort-matrix-by-diagonals.java
120	3778	3778 Transform Array By Parity	Problem	transform-array-by-parity.py
121	3811	3811 Reverse Degree Of A String	Problem	reverse-degree-of-a-string.py
122	3830	3830 Find Closest Person	Problem	find-closest-person.py
123	4008	4008 Restore Finishing Order	Problem	restore-finishing-order.py
124	4058	4058 Compute Alternating Sum	Problem	compute-alternating-sum.py
125	4080	4080 Smallest Missing Multiple Of K	Problem	smallest-missing-multiple-of-k.py
126	42	42 Trapping Rain Water	Problem	trapping-rain-water.py
127	448	448 Find All Numbers Disappeared In An Array	Problem	find-all-numbers-disappeared-in-an-array.cpp
128	451	451 Sort Characters By Frequency	Problem	sort-characters-by-frequency.py
129	48	48 Rotate Image	Problem	rotate-image.java
130	485	485 Max Consecutive Ones	Problem	max-consecutive-ones.py
131	49	49 Groupanagrams	-	View Code
132	5	5 Longest Palindromic Substring	Problem	longest-palindromic-substring.py
133	50	50 Pow	X,N	-
134	53	53 Maximum Subarray	Problem	maximum-subarray.java
135	54	54 Spiralmatrix	-	View Code
136	58	58 Length Of Last Word	Problem	length-of-last-word.py
137	5	5 Longestpalindromicsubstring	-	View Code
138	60	60 Permutation Sequence	Problem	permutation-sequence.py
139	636	636 Exclusive Time Of Functions	Problem	exclusive-time-of-functions.cpp
140	645	645 Set Mismatch	Problem	set-mismatch.cpp
141	65	65 Validnumber	-	View Code
142	66	66 Plus One	Problem	plus-one.py
143	68	68 Text Justification	Problem	text-justification.java
144	69	69 Sqrtx	Problem	sqrtx.py
145	7	7 Reverse Integer	Problem	reverse-integer.py
146	73	73 Set Matrix Zeroes	Problem	set-matrix-zeroes.java
147	739	739 Daily Temperatures	Problem	daily-temperatures.cpp
148	74	74 Search A 2D Matrix	Problem	search-a-2d-matrix.py
149	75	75 Sort Colors	Problem	sort-colors.java
150	78	78 Subsets	Problem	subsets.py
151	782	782 Jewels And Stones	Problem	-
152	8	8 String To Integer Atoi	Problem	string-to-integer-atoi.py
153	808	808 Soupservings	-	View Code
154	825	825 Max Increase To Keep City Skyline	Problem	max-increase-to-keep-city-skyline.py
155	84	84 Largest Rectangle In Histogram	Problem	largest-rectangle-in-histogram.cpp
156	867	867 New 21 Game	Problem	new-21-game.py
157	869	869 Reorderedpowerof2	-	View Code
158	88	88 Merge Sorted Array	Problem	merge-sorted-array.py
159	9	9 Palindrome Number	Problem	palindrome-number.cpp
160	907	907 Koko Eating Bananas	Problem	koko-eating-bananas.py
161	908	908 Middle Of The Linked List	Problem	-
162	909	909 Stone Game	Problem	stone-game.java
163	90	90 Subsetsii	-	View Code
164	93	93 Restore Ip Addresses	Problem	restore-ip-addresses.cpp
165	932	932 Monotonic Array	Problem	monotonic-array.java
166	9	9 Palindromenumber	-	View Code
167	-	Solutions	-	-

(Click on View Code to open the file in GitHub.)

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🚀 How to Use

1. Clone the repository

   git clone https://github.com/HardikLovesTech/LeetCodeSolutions.git