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CodeSignal
CodeSignal
 
 
Learn
Learn
 
 
100. Same Tree.py
100. Same Tree.py
 
 
1002. Find Common Characters.py
1002. Find Common Characters.py
 
 
101. Symmetric Tree.py
101. Symmetric Tree.py
 
 
1010. Pairs of Songs With Total Durations Divisible by 60.py
1010. Pairs of Songs With Total Durations Divisible by 60.py
 
 
1011. Capacity To Ship Packages Within D Days.py
1011. Capacity To Ship Packages Within D Days.py
 
 
102. Binary Tree Level Order Traversal.py
102. Binary Tree Level Order Traversal.py
 
 
1026. Maximum Difference Between Node and Ancestor.py
1026. Maximum Difference Between Node and Ancestor.py
 
 
1046. Last Stone Weight.py
1046. Last Stone Weight.py
 
 
1047. Remove All Adjacent Duplicates In String.py
1047. Remove All Adjacent Duplicates In String.py
 
 
1056. Confusing Number.py
1056. Confusing Number.py
 
 
1061. Lexicographically Smallest Equivalent String.py
1061. Lexicographically Smallest Equivalent String.py
 
 
1071. Greatest Common Divisor of Strings.py
1071. Greatest Common Divisor of Strings.py
 
 
1088. Confusing Number II.py
1088. Confusing Number II.py
 
 
110. Balanced Binary Tree.py
110. Balanced Binary Tree.py
 
 
1101. The Earliest Moment When Everyone Become Friends.py
1101. The Earliest Moment When Everyone Become Friends.py
 
 
1114. Print in Order.py
1114. Print in Order.py
 
 
1117. Building H2O.py
1117. Building H2O.py
 
 
1143. Longest Common Subsequence.py
1143. Longest Common Subsequence.py
 
 
1152. Analyze User Website Visit Pattern.py
1152. Analyze User Website Visit Pattern.py
 
 
1188. Design Bounded Blocking Queue.py
1188. Design Bounded Blocking Queue.py
 
 
1200. Minimum Absolute Difference.py
1200. Minimum Absolute Difference.py
 
 
1207. Unique Number of Occurrences.py
1207. Unique Number of Occurrences.py
 
 
1209. Remove All Adjacent Duplicates in String II.py
1209. Remove All Adjacent Duplicates in String II.py
 
 
1226. The Dining Philosophers.py
1226. The Dining Philosophers.py
 
 
1229. Meeting Scheduler.py
1229. Meeting Scheduler.py
 
 
1232. Check If It Is a Straight Line.py
1232. Check If It Is a Straight Line.py
 
 
1236. Web Crawler.py
1236. Web Crawler.py
 
 
124. Binary Tree Maximum Path Sum.py
124. Binary Tree Maximum Path Sum.py
 
 
125. Valid Palindrome.py
125. Valid Palindrome.py
 
 
1275. Find Winner on a Tic Tac Toe Game.py
1275. Find Winner on a Tic Tac Toe Game.py
 
 
1290. Convert Binary Number in a Linked List to Integer.py
1290. Convert Binary Number in a Linked List to Integer.py
 
 
1309. Decrypt String from Alphabet to Integer Mapping.py
1309. Decrypt String from Alphabet to Integer Mapping.py
 
 
131. Palindrome Partitioning.py
131. Palindrome Partitioning.py
 
 
1323. Maximum 69 Number.py
1323. Maximum 69 Number.py
 
 
1328. Break a Palindrome.py
1328. Break a Palindrome.py
 
 
1339. Maximum Product of Splitted Binary Tree.py
1339. Maximum Product of Splitted Binary Tree.py
 
 
134. Gas Station.py
134. Gas Station.py
 
 
1356. Sort Integers by The Number of 1 Bits.py
1356. Sort Integers by The Number of 1 Bits.py
 
 
1360. Number of Days Between Two Dates.py
1360. Number of Days Between Two Dates.py
 
 
1413. Minimum Value to Get Positive Step by Step Sum.py
1413. Minimum Value to Get Positive Step by Step Sum.py
 
 
1423. Maximum Points You Can Obtain from Cards.py
1423. Maximum Points You Can Obtain from Cards.py
 
 
143. Reorder List.py
143. Reorder List.py
 
 
1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit.py
1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit.py
 
 
144. Binary Tree Preorder Traversal.py
144. Binary Tree Preorder Traversal.py
 
 
1443. Minimum Time to Collect All Apples in a Tree.py
1443. Minimum Time to Collect All Apples in a Tree.py
 
 
145. Binary Tree Postorder Traversal.py
145. Binary Tree Postorder Traversal.py
 
 
146. LRU Cache.py
146. LRU Cache.py
 
 
1470. Shuffle the Array.py
1470. Shuffle the Array.py
 
 
1480. Running Sum of 1d Array.py
1480. Running Sum of 1d Array.py
 
 
1487. Making File Names Unique.py
1487. Making File Names Unique.py
 
 
149. Max Points on a Line.py
149. Max Points on a Line.py
 
 
150. Evaluate Reverse Polish Notation.py
150. Evaluate Reverse Polish Notation.py
 
 
1519. Number of Nodes in the Sub-Tree With the Same Label.py
1519. Number of Nodes in the Sub-Tree With the Same Label.py
 
 
1523. Count Odd Numbers in an Interval Range.py
1523. Count Odd Numbers in an Interval Range.py
 
 
1533. Find the Index of the Large Integer.py
1533. Find the Index of the Large Integer.py
 
 
1544. Make The String Great.py
1544. Make The String Great.py
 
 
1572. Matrix Diagonal Sum.py
1572. Matrix Diagonal Sum.py
 
 
1588. Sum of All Odd Length Subarrays.py
1588. Sum of All Odd Length Subarrays.py
 
 
16. 3Sum Closest.py
16. 3Sum Closest.py
 
 
1603. Design Parking System.py
1603. Design Parking System.py
 
 
161. One Edit Distance.py
161. One Edit Distance.py
 
 
163. Missing Ranges.py
163. Missing Ranges.py
 
 
1636. Sort Array by Increasing Frequency.py
1636. Sort Array by Increasing Frequency.py
 
 
1647. Minimum Deletions to Make Character Frequencies Unique.py
1647. Minimum Deletions to Make Character Frequencies Unique.py
 
 
1656. Design an Ordered Stream.py
1656. Design an Ordered Stream.py
 
 
1657. Determine if Two Strings Are Close.py
1657. Determine if Two Strings Are Close.py
 
 
1658. Minimum Operations to Reduce X to Zero.py
1658. Minimum Operations to Reduce X to Zero.py
 
 
169. Majority Element.py
169. Majority Element.py
 
 
1704. Determine if String Halves Are Alike.py
1704. Determine if String Halves Are Alike.py
 
 
1710. Maximum Units on a Truck.py
1710. Maximum Units on a Truck.py
 
 
1711. Count Good Meals.py
1711. Count Good Meals.py
 
 
1730. Shortest Path to Get Food.py
1730. Shortest Path to Get Food.py
 
 
1768. Merge Strings Alternately.py
1768. Merge Strings Alternately.py
 
 
1779. Find Nearest Point That Has the Same X or Y Coordinate.py
1779. Find Nearest Point That Has the Same X or Y Coordinate.py
 
 
1790. Check if One String Swap Can Make Strings Equal.py
1790. Check if One String Swap Can Make Strings Equal.py
 
 
1791. Find Center of Star Graph.py
1791. Find Center of Star Graph.py
 
 
1800. Maximum Ascending Subarray Sum.py
1800. Maximum Ascending Subarray Sum.py
 
 
1833. Maximum Ice Cream Bars.py
1833. Maximum Ice Cream Bars.py
 
 
1834. Single-Threaded CPU.py
1834. Single-Threaded CPU.py
 
 
1842. Next Palindrome Using Same Digits.py
1842. Next Palindrome Using Same Digits.py
 
 
1854. Maximum Population Year.py
1854. Maximum Population Year.py
 
 
1859. Sorting the Sentence.py
1859. Sorting the Sentence.py
 
 
191. Number of 1 Bits.py
191. Number of 1 Bits.py
 
 
1920. Build Array from Permutation.py
1920. Build Array from Permutation.py
 
 
1941. Check if All Characters Have Equal Number of Occurrences.py
1941. Check if All Characters Have Equal Number of Occurrences.py
 
 
1962. Remove Stones to Minimize the Total.py
1962. Remove Stones to Minimize the Total.py
 
 
1971. Find if Path Exists in Graph.py
1971. Find if Path Exists in Graph.py
 
 
198. House Robber.py
198. House Robber.py
 
 
2. Add Two Numbers.py
2. Add Two Numbers.py
 
 
200. Number of Islands.py
200. Number of Islands.py
 
 
2007. Find Original Array From Doubled Array.py
2007. Find Original Array From Doubled Array.py
 
 
202. Happy Number.py
202. Happy Number.py
 
 
2023. Number of Pairs of Strings With Concatenation Equal to Target.py
2023. Number of Pairs of Strings With Concatenation Equal to Target.py
 
 
2034. Stock Price Fluctuation.py
2034. Stock Price Fluctuation.py
 
 
2042. Check if Numbers Are Ascending in a Sentence.py
2042. Check if Numbers Are Ascending in a Sentence.py
 
 
2043. Simple Bank System.py
2043. Simple Bank System.py
 
 
2043. Simple Bank System_v2.py
2043. Simple Bank System_v2.py
 
 
205. Isomorphic Strings.py
205. Isomorphic Strings.py