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Arsh Goyal Sheet
DSA
Interview Prep
Arsh
Curated DSA problems from Arsh Goyal
By Arsh Goyal
316 Problems
0%
0/316 completed
All
Basic
Easy
Medium
Hard
Bookmarked
1
Miscellaneous
0/316 completed
0%
1.
Arrays
Medium
2.
https://leetcode.com/problems/find-the-duplicate-number/
Easy
3.
https://leetcode.com/problems/sort-colors/
Easy
4.
https://leetcode.com/problems/remove-duplicates-from-sorted-array/
Easy
5.
https://leetcode.com/problems/set-matrix-zeroes/
Easy
6.
https://leetcode.com/problems/move-zeroes/
Easy
7.
https://leetcode.com/problems/best-time-to-buy-and-sell-stock/
Easy
8.
https://www.geeksforgeeks.org/chocolate-distribution-problem/
Easy
9.
https://leetcode.com/problems/two-sum/
Easy
10.
https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/
Easy
11.
https://leetcode.com/problems/subarray-sums-divisible-by-k/
Medium
12.
https://leetcode.com/problems/find-all-duplicates-in-an-array/
Medium
13.
https://leetcode.com/problems/container-with-most-water/
Medium
14.
https://leetcode.com/problems/3sum/
Medium
15.
https://leetcode.com/problems/4sum/
Medium
16.
https://leetcode.com/problems/maximum-points-you-can-obtain-from-cards/
Medium
17.
https://leetcode.com/problems/subarray-sum-equals-k/
Medium
18.
https://leetcode.com/problems/spiral-matrix/
Medium
19.
https://leetcode.com/problems/word-search/
Medium
20.
https://leetcode.com/problems/jump-game/
Medium
21.
https://leetcode.com/problems/merge-sorted-array/
Medium
22.
https://leetcode.com/problems/majority-element/
Medium
23.
https://leetcode.com/problems/reverse-pairs/
Medium
24.
https://www.geeksforgeeks.org/print-all-possible-combinations-of-r-elements-in-a-given-array-of-size-n/
Medium
25.
https://leetcode.com/problems/game-of-life/
Medium
26.
https://leetcode.com/problems/max-value-of-equation/
Hard
27.
https://leetcode.com/problems/insert-delete-getrandom-o1-duplicates-allowed/
Hard
28.
https://leetcode.com/problems/largest-rectangle-in-histogram/
Hard
29.
https://leetcode.com/problems/max-value-of-equation/
Hard
30.
Strings
Medium
31.
https://leetcode.com/problems/valid-parentheses/
Easy
32.
https://www.geeksforgeeks.org/print-all-the-duplicates-in-the-input-string/
Easy
33.
https://leetcode.com/problems/implement-strstr/
Easy
34.
https://leetcode.com/problems/longest-common-prefix/
Easy
35.
https://leetcode.com/problems/valid-palindrome-ii/
Easy
36.
https://leetcode.com/problems/integer-to-roman/
Medium
37.
https://leetcode.com/problems/generate-parentheses/
Medium
38.
https://leetcode.com/problems/simplify-path/
Medium
39.
https://practice.geeksforgeeks.org/problems/smallest-window-in-a-string-containing-all-the-characters-of-another-string-1587115621/1
Medium
40.
https://leetcode.com/problems/reverse-words-in-a-string/
Medium
41.
https://www.geeksforgeeks.org/rabin-karp-algorithm-for-pattern-searching/
Medium
42.
https://leetcode.com/problems/group-anagrams/
Medium
43.
https://practice.geeksforgeeks.org/problems/word-wrap1646/1
Medium
44.
https://leetcode.com/problems/basic-calculator-ii/
Medium
45.
https://leetcode.com/problems/valid-number/
Hard
46.
https://leetcode.com/problems/integer-to-english-words/
Hard
47.
https://leetcode.com/problems/minimum-window-substring/
Hard
48.
https://leetcode.com/problems/text-justification/
Hard
49.
https://www.geeksforgeeks.org/boyer-moore-algorithm-for-pattern-searching/
Hard
50.
https://leetcode.com/problems/distinct-subsequences/
Hard
51.
Matrix Problems
Medium
52.
https://www.geeksforgeeks.org/maximum-size-rectangle-binary-sub-matrix-1s/
Medium
53.
https://www.geeksforgeeks.org/find-number-of-islands/
Medium
54.
https://www.geeksforgeeks.org/given-matrix-o-x-replace-o-x-surrounded-x/
Medium
55.
https://leetcode.com/problems/spiral-matrix/
Medium
56.
https://leetcode.com/problems/rotate-image/
Medium
57.
Mathematical Problems
Medium
58.
https://leetcode.com/problems/minimum-moves-to-equal-array-elements/
Easy
59.
https://leetcode.com/problems/add-binary/
Easy
60.
https://leetcode.com/problems/maximum-product-of-three-numbers/
Easy
61.
https://leetcode.com/problems/excel-sheet-column-title/
Easy
62.
https://leetcode.com/problems/happy-number/
Easy
63.
https://leetcode.com/problems/palindrome-number/
Easy
64.
https://leetcode.com/problems/missing-number/
Easy
65.
https://leetcode.com/problems/reverse-integer/
Easy
66.
https://leetcode.com/problems/power-of-two/
Easy
67.
https://leetcode.com/problems/max-points-on-a-line/
Medium
68.
https://leetcode.com/problems/valid-square/
Medium
69.
https://leetcode.com/problems/the-kth-factor-of-n/
Medium
70.
Sorting and Searching
Medium
71.
https://www.geeksforgeeks.org/permute-two-arrays-sum-every-pair-greater-equal-k/
Easy
72.
https://www.geeksforgeeks.org/ceiling-in-a-sorted-array/
Easy
73.
https://www.geeksforgeeks.org/find-a-pair-with-the-given-difference/
Easy
74.
https://www.geeksforgeeks.org/permute-two-arrays-sum-every-pair-greater-equal-k/
Easy
75.
https://www.geeksforgeeks.org/check-reversing-sub-array-make-array-sorted/
Medium
76.
https://www.geeksforgeeks.org/radix-sort/
Medium
77.
https://www.geeksforgeeks.org/a-product-array-puzzle/
Medium
78.
https://www.geeksforgeeks.org/make-array-elements-equal-minimum-cost/
Medium
79.
https://leetcode.com/problems/find-peak-element/
Medium
80.
https://practice.geeksforgeeks.org/problems/allocate-minimum-number-of-pages0937/1
Hard
81.
https://www.geeksforgeeks.org/minimum-number-swaps-required-sort-array/
Hard
82.
https://www.spoj.com/problems/AGGRCOW/
Hard
83.
https://leetcode.com/problems/search-in-rotated-sorted-array/
Hard
84.
https://leetcode.com/problems/count-of-smaller-numbers-after-self/
Hard
85.
https://leetcode.com/problems/split-array-largest-sum/
Hard
86.
Linked List
Medium
87.
https://leetcode.com/problems/middle-of-the-linked-list/
Easy
88.
https://leetcode.com/problems/linked-list-cycle/
Easy
89.
https://leetcode.com/problems/convert-binary-number-in-a-linked-list-to-integer/
Easy
90.
https://leetcode.com/problems/remove-duplicates-from-sorted-list/
Easy
91.
https://www.geeksforgeeks.org/sort-a-linked-list-of-0s-1s-or-2s/
Easy
92.
https://leetcode.com/problems/remove-linked-list-elements/
Easy
93.
https://leetcode.com/problems/merge-two-sorted-lists/
Easy
94.
https://www.geeksforgeeks.org/multiply-two-numbers-represented-linked-lists/
Easy
95.
https://leetcode.com/problems/intersection-of-two-linked-lists/
Easy
96.
https://www.geeksforgeeks.org/given-only-a-pointer-to-a-node-to-be-deleted-in-a-singly-linked-list-how-do-you-delete-it/
Easy
97.
https://leetcode.com/problems/palindrome-linked-list/
Easy
98.
https://leetcode.com/problems/reverse-linked-list/
Easy
99.
https://leetcode.com/problems/add-two-numbers/
Medium
100.
https://leetcode.com/problems/copy-list-with-random-pointer/
Medium
101.
https://leetcode.com/problems/add-two-numbers-ii/
Medium
102.
https://leetcode.com/problems/reverse-linked-list-ii/
Medium
103.
https://leetcode.com/problems/reorder-list/
Medium
104.
https://leetcode.com/problems/remove-nth-node-from-end-of-list/
Medium
105.
https://leetcode.com/problems/flatten-a-multilevel-doubly-linked-list/
Medium
106.
https://leetcode.com/problems/partition-list/
Medium
107.
https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/
Medium
108.
https://www.geeksforgeeks.org/linked-list-in-zig-zag-fashion/
Medium
109.
https://leetcode.com/problems/sort-list/
Medium
110.
https://www.geeksforgeeks.org/segregate-even-and-odd-elements-in-a-linked-list/
Medium
111.
https://www.geeksforgeeks.org/rearrange-a-given-linked-list-in-place/
Medium
112.
https://leetcode.com/problems/merge-k-sorted-lists/
Hard
113.
https://leetcode.com/problems/reverse-nodes-in-k-group/
Hard
114.
https://www.geeksforgeeks.org/merge-sort-for-linked-list/
Hard
115.
https://www.geeksforgeeks.org/flattening-a-linked-list/
Hard
116.
https://www.geeksforgeeks.org/subtract-two-numbers-represented-as-linked-lists/
Hard
117.
Stacks and Queues
Medium
118.
https://leetcode.com/problems/implement-queue-using-stacks/
Easy
119.
https://leetcode.com/problems/backspace-string-compare/
Easy
120.
https://leetcode.com/problems/implement-stack-using-queues/
Easy
121.
https://www.geeksforgeeks.org/implement-stack-queue-using-deque/
Easy
122.
https://leetcode.com/problems/next-greater-element-i/
Easy
123.
https://www.geeksforgeeks.org/stack-set-4-evaluation-postfix-expression/
Easy
124.
https://www.geeksforgeeks.org/implement-two-stacks-in-an-array/
Easy
125.
https://leetcode.com/problems/minimum-cost-tree-from-leaf-values/
Medium
126.
https://leetcode.com/problems/daily-temperatures/
Medium
127.
https://practice.geeksforgeeks.org/problems/distance-of-nearest-cell-having-1-1587115620/1
Medium
128.
https://leetcode.com/problems/online-stock-span/
Medium
129.
https://practice.geeksforgeeks.org/problems/rotten-oranges2536/1
Medium
130.
https://leetcode.com/problems/sum-of-subarray-minimums/
Medium
131.
https://leetcode.com/problems/evaluate-reverse-polish-notation/
Medium
132.
https://practice.geeksforgeeks.org/problems/circular-tour/1
Medium
133.
https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii/
Medium
134.
https://leetcode.com/problems/flatten-nested-list-iterator/
Medium
135.
https://www.geeksforgeeks.org/find-the-maximum-of-minimums-for-every-window-size-in-a-given-array/
Hard
136.
https://www.geeksforgeeks.org/lru-cache-implementation/
Hard
137.
http://geeksforgeeks.org/the-celebrity-problem/
Hard
138.
Trees
Medium
139.
https://leetcode.com/problems/diameter-of-binary-tree/
Easy
140.
https://leetcode.com/problems/invert-binary-tree/
Easy
141.
https://leetcode.com/problems/subtree-of-another-tree/
Easy
142.
https://leetcode.com/problems/range-sum-of-bst/
Easy
143.
https://leetcode.com/problems/symmetric-tree/
Easy
144.
https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/
Easy
145.
https://leetcode.com/problems/merge-two-binary-trees/
Easy
146.
https://leetcode.com/problems/maximum-depth-of-binary-tree/
Easy
147.
https://leetcode.com/problems/binary-tree-paths/
Easy
148.
https://leetcode.com/problems/same-tree/
Easy
149.
https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/
Easy
150.
https://leetcode.com/problems/path-sum/
Easy
151.
https://leetcode.com/problems/minimum-absolute-difference-in-bst/
Easy
152.
https://leetcode.com/problems/sum-of-left-leaves/
Easy
153.
https://leetcode.com/problems/balanced-binary-tree/
Easy
154.
https://practice.geeksforgeeks.org/problems/predecessor-and-successor/1
Easy
155.
https://leetcode.com/problems/binary-tree-inorder-traversal/
Easy
156.
https://practice.geeksforgeeks.org/problems/check-whether-bst-contains-dead-end/1
Easy
157.
https://leetcode.com/problems/binary-search-tree-iterator/
Medium
158.
https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/
Medium
159.
https://leetcode.com/problems/unique-binary-search-trees-ii/
Medium
160.
https://leetcode.com/problems/all-nodes-distance-k-in-binary-tree/
Medium
161.
https://leetcode.com/problems/validate-binary-search-tree/
Medium
162.
https://leetcode.com/problems/binary-tree-right-side-view/
Medium
163.
https://leetcode.com/problems/redundant-connection/
Medium
164.
https://leetcode.com/problems/binary-tree-level-order-traversal/
Medium
165.
https://leetcode.com/problems/path-sum-iii/
Medium
166.
https://leetcode.com/problems/construct-binary-tree-from-preorder-and-postorder-traversal/
Medium
167.
https://leetcode.com/problems/unique-binary-search-trees/
Medium
168.
https://leetcode.com/problems/recover-binary-search-tree/
Medium
169.
https://leetcode.com/problems/populating-next-right-pointers-in-each-node/
Medium
170.
https://leetcode.com/problems/flatten-binary-tree-to-linked-list/
Medium
171.
https://leetcode.com/problems/maximum-width-of-binary-tree/
Medium
172.
https://practice.geeksforgeeks.org/problems/min-distance-between-two-given-nodes-of-a-binary-tree/1
Medium
173.
https://leetcode.com/problems/kth-smallest-element-in-a-bst/
Medium
174.
https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/
Medium
175.
https://practice.geeksforgeeks.org/problems/count-bst-nodes-that-lie-in-a-given-range/1
Medium
176.
https://practice.geeksforgeeks.org/problems/preorder-to-postorder4423/1
Medium
177.
https://practice.geeksforgeeks.org/problems/binary-tree-to-dll/1
Hard
178.
https://leetcode.com/problems/binary-tree-maximum-path-sum/
Hard
179.
https://leetcode.com/problems/sum-of-distances-in-tree/
Hard
180.
https://leetcode.com/problems/binary-tree-cameras/
Hard
181.
https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree/
Hard
182.
https://www.geeksforgeeks.org/print-k-sum-paths-binary-tree/
Hard
183.
https://leetcode.com/problems/serialize-and-deserialize-binary-tree/
Hard
184.
https://www.geeksforgeeks.org/find-median-bst-time-o1-space/
Hard
185.
https://www.geeksforgeeks.org/largest-bst-binary-tree-set-2/
Hard
186.
https://www.geeksforgeeks.org/construct-bst-from-given-preorder-traversa/
Hard
187.
GRAPHS
Medium
188.
https://practice.geeksforgeeks.org/problems/bfs-traversal-of-graph/1
Easy
189.
https://www.geeksforgeeks.org/depth-first-search-or-dfs-for-a-graph/
Easy
190.
https://leetcode.com/problems/number-of-islands/
Easy
191.
https://leetcode.com/problems/flood-fill/
Easy
192.
https://practice.geeksforgeeks.org/problems/rat-in-a-maze-problem/1
Easy
193.
https://practice.geeksforgeeks.org/problems/detect-cycle-in-an-undirected-graph/1
Easy
194.
https://www.geeksforgeeks.org/detect-cycle-in-a-graph/
Easy
195.
https://practice.geeksforgeeks.org/problems/steps-by-knight5927/1
Medium
196.
https://leetcode.com/problems/decode-string/
Medium
197.
https://leetcode.com/problems/shortest-bridge/
Medium
198.
https://leetcode.com/problems/number-of-operations-to-make-network-connected/
Medium
199.
https://leetcode.com/problems/find-eventual-safe-states/
Medium
200.
https://practice.geeksforgeeks.org/problems/strongly-connected-components-kosarajus-algo/1
Medium
201.
https://leetcode.com/problems/time-needed-to-inform-all-employees/
Medium
202.
https://www.geeksforgeeks.org/graph-coloring-applications/#:~:text=Graph%20coloring%20problem%20is%20to,are%20colored%20using%20same%20color.
Medium
203.
https://leetcode.com/problems/most-stones-removed-with-same-row-or-column/
Medium
204.
https://leetcode.com/problems/as-far-from-land-as-possible/
Medium
205.
https://leetcode.com/problems/find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance/
Medium
206.
https://www.geeksforgeeks.org/find-whether-it-is-possible-to-finish-all-tasks-or-not-from-given-dependencies/
Medium
207.
https://www.geeksforgeeks.org/prims-minimum-spanning-tree-mst-greedy-algo-5/
Medium
208.
https://practice.geeksforgeeks.org/problems/implementing-floyd-warshall2042/1
Medium
209.
https://leetcode.com/problems/evaluate-division/
Medium
210.
https://leetcode.com/problems/snakes-and-ladders/
Medium
211.
https://practice.geeksforgeeks.org/problems/topological-sort/1
Medium
212.
https://leetcode.com/problems/cheapest-flights-within-k-stops/description/
Medium
213.
https://www.geeksforgeeks.org/detect-negative-cycle-graph-bellman-ford/
Medium
214.
https://www.geeksforgeeks.org/bipartite-graph/
Medium
215.
https://leetcode.com/problems/longest-increasing-path-in-a-matrix/
Hard
216.
https://leetcode.com/problems/making-a-large-island/
Hard
217.
https://leetcode.com/problems/remove-boxes/
Hard
218.
https://leetcode.com/problems/critical-connections-in-a-network/
Hard
219.
https://practice.geeksforgeeks.org/problems/alien-dictionary/1
Hard
220.
https://www.geeksforgeeks.org/water-jug-problem-using-bfs/
Hard
221.
https://www.geeksforgeeks.org/travelling-salesman-problem-set-1/
Hard
222.
https://www.geeksforgeeks.org/total-number-spanning-trees-graph/
Hard
223.
https://leetcode.com/problems/word-ladder/
Hard
224.
https://www.geeksforgeeks.org/minimize-cash-flow-among-given-set-friends-borrowed-money/
Hard
225.
Tries
Medium
226.
https://leetcode.com/problems/design-add-and-search-words-data-structure/
Medium
227.
https://www.geeksforgeeks.org/word-break-problem-trie-solution/
Medium
228.
https://www.geeksforgeeks.org/trie-insert-and-search/
Medium
229.
https://practice.geeksforgeeks.org/problems/k-anagrams-1/0
Medium
230.
https://leetcode.com/problems/palindrome-pairs/
Hard
231.
https://practice.geeksforgeeks.org/problems/phone-directory/0
Hard
232.
Heaps / PQs
Medium
233.
https://leetcode.com/problems/top-k-frequent-elements/
Medium
234.
https://leetcode.com/problems/kth-largest-element-in-an-array/
Medium
235.
https://leetcode.com/problems/ugly-number-ii/
Medium
236.
https://leetcode.com/problems/furthest-building-you-can-reach/
Medium
237.
https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix/
Medium
238.
https://leetcode.com/problems/reorganize-string/
Medium
239.
https://leetcode.com/problems/find-the-most-competitive-subsequence/
Medium
240.
https://practice.geeksforgeeks.org/problems/smallest-positive-missing-number-1587115621/1/
Medium
241.
https://practice.geeksforgeeks.org/problems/largest-subarray-with-0-sum/1/
Medium
242.
https://leetcode.com/problems/k-closest-points-to-origin/
Medium
243.
https://leetcode.com/problems/minimum-number-of-refueling-stops/
Hard
244.
https://leetcode.com/problems/minimum-cost-to-hire-k-workers/
Hard
245.
https://leetcode.com/problems/swim-in-rising-water/
Hard
246.
https://leetcode.com/problems/sliding-window-maximum/
Hard
247.
Dynamic Programming
Medium
248.
https://leetcode.com/problems/climbing-stairs
Easy
249.
https://leetcode.com/problems/maximum-product-subarray/
Easy
250.
https://leetcode.com/problems/ones-and-zeroes/
Easy
251.
https://leetcode.com/problems/counting-bits/
Easy
252.
https://leetcode.com/problems/knight-dialer/
Medium
253.
https://practice.geeksforgeeks.org/problems/cutted-segments1642/1
Medium
254.
https://leetcode.com/problems/unique-paths/
Medium
255.
https://leetcode.com/problems/minimum-path-sum/
Medium
256.
https://leetcode.com/problems/coin-change/
Medium
257.
https://leetcode.com/problems/decode-ways/
Medium
258.
https://leetcode.com/problems/maximum-length-of-repeated-subarray/
Medium
259.
https://leetcode.com/problems/longest-increasing-subsequence/
Medium
260.
https://practice.geeksforgeeks.org/problems/longest-common-substring1452/1
Medium
261.
https://leetcode.com/problems/count-square-submatrices-with-all-ones/
Medium
262.
https://leetcode.com/problems/maximal-square/
Medium
263.
https://practice.geeksforgeeks.org/problems/mobile-numeric-keypad5456/1
Medium
264.
https://www.geeksforgeeks.org/weighted-job-scheduling/
Medium
265.
https://leetcode.com/problems/delete-and-earn/
Medium
266.
https://leetcode.com/problems/range-sum-query-2d-immutable/
Medium
267.
https://www.geeksforgeeks.org/optimal-binary-search-tree-dp-24/
Hard
268.
https://leetcode.com/problems/frog-jump/
Hard
269.
https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv/
Hard
270.
https://leetcode.com/problems/minimum-insertion-steps-to-make-a-string-palindrome/
Hard
271.
https://www.geeksforgeeks.org/largest-area-rectangular-sub-matrix-equal-number-1s-0s/
Hard
272.
https://leetcode.com/problems/trapping-rain-water/
Hard
273.
https://leetcode.com/problems/minimum-cost-to-merge-stones/
Hard
274.
https://leetcode.com/problems/count-different-palindromic-subsequences/
Hard
275.
https://leetcode.com/problems/maximal-rectangle/
Hard
276.
https://leetcode.com/problems/burst-balloons/
Hard
277.
https://leetcode.com/problems/super-egg-drop/
Hard
278.
Two Pointer Approach
Medium
279.
https://leetcode.com/problems/sort-colors/
Medium
280.
https://leetcode.com/problems/longest-repeating-character-replacement/
Medium
281.
https://leetcode.com/problems/maximum-number-of-visible-points/
Medium
282.
Greedy Algorithms
Medium
283.
https://leetcode.com/problems/gas-station/
Medium
284.
https://www.geeksforgeeks.org/minimum-cost-for-acquiring-all-coins-with-k-extra-coins-allowed-with-every-coin/
Medium
285.
https://leetcode.com/problems/restore-the-array-from-adjacent-pairs/
Medium
286.
https://leetcode.com/problems/task-scheduler/
Medium
287.
https://leetcode.com/problems/minimum-deletions-to-make-character-frequencies-unique/
Medium
288.
https://leetcode.com/problems/remove-k-digits/
Medium
289.
https://www.spoj.com/problems/CHOCOLA/
Medium
290.
https://leetcode.com/problems/non-overlapping-intervals/
Medium
291.
https://leetcode.com/problems/minimum-deletion-cost-to-avoid-repeating-letters/
Medium
292.
https://www.geeksforgeeks.org/minimum-sum-two-numbers-formed-digits-array-2/
Medium
293.
Backtracking
Medium
294.
https://leetcode.com/problems/combination-sum-ii/
Medium
295.
https://practice.geeksforgeeks.org/problems/subset-sum-problem2014/1
Medium
296.
https://leetcode.com/problems/combinations/
Medium
297.
https://leetcode.com/problems/subsets-ii/
Medium
298.
https://practice.geeksforgeeks.org/problems/m-coloring-problem-1587115620/1
Medium
299.
https://leetcode.com/problems/beautiful-arrangement/
Medium
300.
https://leetcode.com/problems/palindrome-partitioning/
Medium
301.
https://leetcode.com/problems/permutations-ii/
Medium
302.
https://leetcode.com/problems/word-search-ii/
Hard
303.
https://leetcode.com/problems/sudoku-solver/
Hard
304.
https://leetcode.com/problems/n-queens/
Hard
305.
https://leetcode.com/problems/unique-paths-iii/
Hard
306.
https://www.geeksforgeeks.org/find-maximum-number-possible-by-doing-at-most-k-swaps/
Hard
307.
https://www.geeksforgeeks.org/partition-set-k-subsets-equal-sum/
Hard
308.
https://www.geeksforgeeks.org/tug-of-war/
Hard
309.
https://www.geeksforgeeks.org/find-paths-from-corner-cell-to-middle-cell-in-maze/
Hard
310.
https://www.geeksforgeeks.org/solving-cryptarithmetic-puzzles-backtracking-8/
Hard
311.
https://www.geeksforgeeks.org/print-palindromic-partitions-string/
Hard
312.
Segment Tree
Medium
313.
https://leetcode.com/problems/range-sum-query-immutable/
Medium
314.
https://leetcode.com/problems/range-sum-query-mutable/
Medium
315.
https://leetcode.com/problems/count-of-smaller-numbers-after-self/
Medium
316.
https://leetcode.com/problems/count-of-range-sum/
Medium
