Solutions & Explanations

Browse 4,030+ detailed solutions with multiple approaches, code in Python, Java, C++ and more.

4,030 Solutions961 Easy2102 Medium967 Hard

Title	Difficulty	Acceptance	Topics	Solution
1151. Minimum Swaps to Group All 1's Together	Medium	61.2%	Array Sliding Window	Read
1152. Analyze User Website Visit Pattern	Medium	44.3%	Array Hash Table+1	Read
1153. String Transforms Into Another String	Hard	34.9%	Hash Table String	Read
1154. Day of the Year	Easy	50.3%	Math String	Read
1155. Number of Dice Rolls With Target Sum	Medium	62.2%	Dynamic Programming	Read
1156. Swap For Longest Repeated Character Substring	Medium	44.9%	Hash Table Sliding Window+1	Read
1157. Online Majority Element In Subarray	Hard	40.9%	Array Binary Indexed Tree+3	Read
1158. Market Analysis I	Medium	57.2%	Database	Read
1159. Market Analysis II	Hard	57.4%	Database	Read
1160. Find Words That Can Be Formed by Characters	Easy	71.5%	Array Counting+2	Read
1161. Maximum Level Sum of a Binary Tree	Medium	70.0%	Binary Tree Breadth-First Search+2	Read
1162. As Far from Land as Possible	Medium	52.2%	Array Breadth-First Search+2	Read
1163. Last Substring in Lexicographical Order	Hard	35.1%	String Two Pointers	Read
1164. Product Price at a Given Date	Medium	57.0%	Database	Read
1165. Single-Row Keyboard	Easy	87.6%	Hash Table String	Read
1166. Design File System	Medium	65.1%	Design Hash Table+2	Read
1167. Minimum Cost to Connect Sticks	Medium	71.8%	Array Greedy+1	Read
1168. Optimize Water Distribution in a Village	Hard	65.5%	Graph Heap (Priority Queue)+2	Read
1169. Invalid Transactions	Medium	32.1%	Array Hash Table+2	Read
1170. Compare Strings by Frequency of the Smallest Character	Medium	63.3%	Array Binary Search+3	Read
1171. Remove Zero Sum Consecutive Nodes from Linked List	Medium	53.3%	Hash Table Linked List	Read
1172. Dinner Plate Stacks	Hard	33.6%	Design Hash Table+2	Read
1173. Immediate Food Delivery I	Easy	80.9%	Database	Read
1174. Immediate Food Delivery II	Medium	53.1%	Database	Read
1175. Prime Arrangements	Easy	63.3%	Math	Read
1176. Diet Plan Performance	Easy	55.9%	Array Sliding Window	Read
1177. Can Make Palindrome from Substring	Medium	42.0%	Array Bit Manipulation+3	Read
1178. Number of Valid Words for Each Puzzle	Hard	47.8%	Array Bit Manipulation+3	Read
1179. Reformat Department Table	Easy	76.9%	Database	Read
1180. Count Substrings with Only One Distinct Letter	Easy	80.9%	Math String	Read
1181. Before and After Puzzle	Medium	51.8%	Array Hash Table+2	Read
1182. Shortest Distance to Target Color	Medium	56.5%	Array Binary Search+1	Read
1183. Maximum Number of Ones	Hard	70.6%	Greedy Heap (Priority Queue)	Read
1184. Distance Between Bus Stops	Easy	56.7%	Array	Read
1185. Day of the Week	Easy	59.6%	Math	Read
1186. Maximum Subarray Sum with One Deletion	Medium	49.4%	Array Dynamic Programming	Read
1187. Make Array Strictly Increasing	Hard	58.0%	Array Binary Search+2	Read
1188. Design Bounded Blocking Queue	Medium	72.6%	Concurrency	Read
1189. Maximum Number of Balloons	Easy	64.1%	Counting Hash Table+1	Read
1190. Reverse Substrings Between Each Pair of Parentheses	Medium	71.8%	Stack String	Read
1191. K-Concatenation Maximum Sum	Medium	25.9%	Array Dynamic Programming	Read
1192. Critical Connections in a Network	Hard	60.6%	Biconnected Component Depth-First Search+1	Read
1193. Monthly Transactions I	Medium	58.3%	Database	Read
1194. Tournament Winners	Hard	49.3%	Database	Read
1195. Fizz Buzz Multithreaded	Medium	73.2%	Concurrency	Read
1196. How Many Apples Can You Put into the Basket	Easy	67.0%	Array Greedy+1	Read
1197. Minimum Knight Moves	Medium	41.8%	Breadth-First Search	Read
1198. Find Smallest Common Element in All Rows	Medium	76.5%	Array Binary Search+3	Read
1199. Minimum Time to Build Blocks	Hard	49.2%	Array Greedy+2	Read
1200. Minimum Absolute Difference	Easy	75.1%	Array Sorting	Read

#1151Medium

Minimum Swaps to Group All 1's Together

ArraySliding Window

Acceptance: 61.2%

#1152Medium

Analyze User Website Visit Pattern

ArrayHash TableSorting

Acceptance: 44.3%

#1153Hard

String Transforms Into Another String

Hash TableString

Acceptance: 34.9%

#1154Easy

Day of the Year

MathString

Acceptance: 50.3%

#1155Medium

Number of Dice Rolls With Target Sum

Dynamic Programming

Acceptance: 62.2%

#1156Medium

Swap For Longest Repeated Character Substring

Hash TableSliding WindowString

Acceptance: 44.9%

#1157Hard

Online Majority Element In Subarray

ArrayBinary Indexed TreeBinary Search+2

Acceptance: 40.9%

#1158Medium

Market Analysis I

Database

Acceptance: 57.2%

#1159Hard

Market Analysis II

Database

Acceptance: 57.4%

#1160Easy

Find Words That Can Be Formed by Characters

ArrayCountingHash Table+1

Acceptance: 71.5%

#1161Medium

Maximum Level Sum of a Binary Tree

Binary TreeBreadth-First SearchDepth-First Search+1

Acceptance: 70.0%

#1162Medium

As Far from Land as Possible

ArrayBreadth-First SearchDynamic Programming+1

Acceptance: 52.2%

#1163Hard

Last Substring in Lexicographical Order

StringTwo Pointers

Acceptance: 35.1%

#1164Medium

Product Price at a Given Date

Database

Acceptance: 57.0%

#1165Easy

Single-Row Keyboard

Hash TableString

Acceptance: 87.6%

#1166Medium

Design File System

DesignHash TableString+1

Acceptance: 65.1%

#1167Medium

Minimum Cost to Connect Sticks

ArrayGreedyHeap (Priority Queue)

Acceptance: 71.8%

#1168Hard

Optimize Water Distribution in a Village

GraphHeap (Priority Queue)Minimum Spanning Tree+1

Acceptance: 65.5%

#1169Medium

Invalid Transactions

ArrayHash TableSorting+1

Acceptance: 32.1%

#1170Medium

Compare Strings by Frequency of the Smallest Character

ArrayBinary SearchHash Table+2

Acceptance: 63.3%

#1171Medium

Remove Zero Sum Consecutive Nodes from Linked List

Hash TableLinked List

Acceptance: 53.3%

#1172Hard

Dinner Plate Stacks

DesignHash TableHeap (Priority Queue)+1

Acceptance: 33.6%

#1173Easy

Immediate Food Delivery I

Database

Acceptance: 80.9%

#1174Medium

Immediate Food Delivery II

Database

Acceptance: 53.1%

#1175Easy

Prime Arrangements

Math

Acceptance: 63.3%

#1176Easy

Diet Plan Performance

ArraySliding Window

Acceptance: 55.9%

#1177Medium

Can Make Palindrome from Substring

ArrayBit ManipulationHash Table+2

Acceptance: 42.0%

#1178Hard

Number of Valid Words for Each Puzzle

ArrayBit ManipulationHash Table+2

Acceptance: 47.8%

#1179Easy

Reformat Department Table

Database

Acceptance: 76.9%

#1180Easy

Count Substrings with Only One Distinct Letter

MathString

Acceptance: 80.9%

#1181Medium

Before and After Puzzle

ArrayHash TableSorting+1

Acceptance: 51.8%

#1182Medium

Shortest Distance to Target Color

ArrayBinary SearchDynamic Programming

Acceptance: 56.5%

#1183Hard

Maximum Number of Ones

GreedyHeap (Priority Queue)

Acceptance: 70.6%

#1184Easy

Distance Between Bus Stops

Array

Acceptance: 56.7%

#1185Easy

Day of the Week

Math

Acceptance: 59.6%

#1186Medium

Maximum Subarray Sum with One Deletion

ArrayDynamic Programming

Acceptance: 49.4%

#1187Hard

Make Array Strictly Increasing

ArrayBinary SearchDynamic Programming+1

Acceptance: 58.0%

#1188Medium

Design Bounded Blocking Queue

Concurrency

Acceptance: 72.6%

#1189Easy

Maximum Number of Balloons

CountingHash TableString

Acceptance: 64.1%

#1190Medium

Reverse Substrings Between Each Pair of Parentheses

StackString

Acceptance: 71.8%

#1191Medium

K-Concatenation Maximum Sum

ArrayDynamic Programming

Acceptance: 25.9%

#1192Hard

Critical Connections in a Network

Biconnected ComponentDepth-First SearchGraph

Acceptance: 60.6%

#1193Medium

Monthly Transactions I

Database

Acceptance: 58.3%

#1194Hard

Tournament Winners

Database

Acceptance: 49.3%

#1195Medium

Fizz Buzz Multithreaded

Concurrency

Acceptance: 73.2%

#1196Easy

How Many Apples Can You Put into the Basket

ArrayGreedySorting

Acceptance: 67.0%

#1197Medium

Minimum Knight Moves

Breadth-First Search

Acceptance: 41.8%

#1198Medium

Find Smallest Common Element in All Rows

ArrayBinary SearchCounting+2

Acceptance: 76.5%

#1199Hard

Minimum Time to Build Blocks

ArrayGreedyHeap (Priority Queue)+1

Acceptance: 49.2%

#1200Easy

Minimum Absolute Difference

ArraySorting

Acceptance: 75.1%

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Master DSA with Step-by-Step Solutions

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