Problems

3,848+ problems · 928 Easy · 2014 Medium · 906 Hard

Title	Solution	Practice	Difficulty	Companies	Topics
1051. Height Checker	Solution	Solve	Easy	Amazon+6	Array Counting Sort+1
1052. Grumpy Bookstore Owner	Solution	Solve	Medium	Amazon+7	Array Sliding Window
1053. Previous Permutation With One Swap	Solution	Solve	Medium	Microsoft	Array Greedy
1054. Distant Barcodes	Solution	Solve	Medium	Amazon+1	Array Counting+4
1055. Shortest Way to Form String	Solution	Solve	Medium	Google+2	Binary Search Greedy+2
1056. Confusing Number	Solution	Solve	Easy	Google	Math
1057. Campus Bikes	Solution	Solve	Medium	Google+1	Array Greedy+1
1058. Minimize Rounding Error to Meet Target	Solution	Solve	Medium	Airbnb	Array Greedy+3
1059. All Paths from Source Lead to Destination	Solution	Solve	Medium	Google	Graph Topological Sort
1060. Missing Element in Sorted Array	Solution	Solve	Medium	Amazon+4	Array Binary Search
1061. Lexicographically Smallest Equivalent String	Solution	Solve	Medium	Amazon+4	String Union Find
1062. Longest Repeating Substring	Solution	Solve	Medium	Amazon+3	Binary Search Dynamic Programming+4
1063. Number of Valid Subarrays	Solution	Solve	Hard	Amazon+1	Array Monotonic Stack+1
1064. Fixed Point	Solution	Solve	Easy	Uber	Array Binary Search
1065. Index Pairs of a String	Solution	Solve	Easy	Amazon	Array Sorting+2
1066. Campus Bikes II	Solution	Solve	Medium	Google	Array Backtracking+3
1067. Digit Count in Range	Solution	Solve	Hard	Amazon	Dynamic Programming Math
1068. Product Sales Analysis I	Solution	Solve	Easy	Amazon+7	Database
1069. Product Sales Analysis II	Solution	Solve	Easy	Amazon	Database
1070. Product Sales Analysis III	Solution	Solve	Medium	Amazon+4	Database
1071. Greatest Common Divisor of Strings	Solution	Solve	Easy	Agoda+7	Math String
1072. Flip Columns For Maximum Number of Equal Rows	Solution	Solve	Medium	Amazon+3	Array Hash Table+1
1073. Adding Two Negabinary Numbers	Solution	Solve	Medium	Grab	Array Math
1074. Number of Submatrices That Sum to Target	Solution	Solve	Hard	Amazon+3	Array Hash Table+2
1075. Project Employees I	Solution	Solve	Easy	Amazon+5	Database
1076. Project Employees II	Solution	Solve	Easy	Meta	Database
1077. Project Employees III	Solution	Solve	Medium	Meta	Database
1078. Occurrences After Bigram	Solution	Solve	Easy	Google	String
1079. Letter Tile Possibilities	Solution	Solve	Medium	Amazon+5	Backtracking Counting+2
1080. Insufficient Nodes in Root to Leaf Paths	Solution	Solve	Medium	Amazon	Binary Tree Depth-First Search+1
1081. Smallest Subsequence of Distinct Characters	Solution	Solve	Medium	Amazon+3	Greedy Monotonic Stack+2
1082. Sales Analysis I	Solution	Solve	Easy	Amazon	Database
1083. Sales Analysis II	Solution	Solve	Easy	Amazon	Database
1084. Sales Analysis III	Solution	Solve	Easy	Amazon+2	Database
1085. Sum of Digits in the Minimum Number	Solution	Solve	Easy	Amazon	Array Math
1086. High Five	Solution	Solve	Easy	Amazon+1	Array Hash Table+2
1087. Brace Expansion	Solution	Solve	Medium	Apple+4	Backtracking Breadth-First Search+1
1088. Confusing Number II	Solution	Solve	Hard	Google	Backtracking Math
1089. Duplicate Zeros	Solution	Solve	Easy	Amazon+3	Array Two Pointers
1090. Largest Values From Labels	Solution	Solve	Medium	Amazon+1	Array Counting+3
1091. Shortest Path in Binary Matrix	Solution	Solve	Medium	Airbnb+16	Array Breadth-First Search+1
1092. Shortest Common Supersequence	Solution	Solve	Hard	Amazon+3	Dynamic Programming String
1093. Statistics from a Large Sample	Solution	Solve	Medium	Microsoft	Array Math+1
1094. Car Pooling	Solution	Solve	Medium	Amazon+13	Array Heap (Priority Queue)+3
1095. Find in Mountain Array	Solution	Solve	Hard	Amazon+5	Array Binary Search+1
1096. Brace Expansion II	Solution	Solve	Hard	Google	Backtracking Breadth-First Search+2
1097. Game Play Analysis V	Solution	Solve	Hard	Gsn Games	Database
1098. Unpopular Books	Solution	Solve	Medium	Meta	Database
1099. Two Sum Less Than K	Solution	Solve	Easy	Amazon	Array Binary Search+2
1100. Find K-Length Substrings With No Repeated Characters	Solution	Solve	Medium	Amazon	Hash Table Sliding Window+1