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DSA Corner

Dashboard Questions Topics Companies Sheets

American Express Interview Questions

22 coding problems asked in American Express interviews. Prepare for your technical interview with real questions.

22

Problems

6

Easy

11

Medium

5

Hard

Difficulty

All22 Easy6 Medium11 Hard5

Status	Title	Video	Leetcode	Solve	Difficulty	Companies	Topics
	1. Two Sum			Solve	Easy	Accenture+29	Array Hash Table
	15. 3Sum			Solve	Medium	Adobe+21	Array Sorting+1
	33. Search in Rotated Sorted Array			Solve	Medium	Accenture+91	Array Binary Search
	125. Valid Palindrome			Solve	Easy	Adobe+8	String Two Pointers
	139. Word Break			Solve	Medium	Accenture+38	Array Dynamic Programming+4
	141. Linked List Cycle			Solve	Easy	42gearMobilitySystems+131	Hash Table Linked List+1
	225. Implement Stack using Queues			Solve	Easy	Accenture+54	Design Queue+1
	239. Sliding Window Maximum			Solve	Hard	Accion Labs India+66	Array Heap (Priority Queue)+3
	300. Longest Increasing Subsequence			Solve	Medium	Accenture+78	Array Binary Search+1
	706. Design HashMap			Solve	Easy	Adobe+26	Array Design+3
	767. Reorganize String			Solve	Medium	Adobe+17	Counting Greedy+4
	815. Bus Routes			Solve	Hard	Amazon+7	Array Breadth-First Search+1
	1201. Ugly Number III			Solve	Medium	American Express	Binary Search Combinatorics+2
	1224. Maximum Equal Frequency			Solve	Hard	American Express	Array Hash Table
	1253. Reconstruct a 2-Row Binary Matrix			Solve	Medium	American Express+1	Array Greedy+1
	1402. Reducing Dishes			Solve	Hard	American Express+2	Array Dynamic Programming+2
	1466. Reorder Routes to Make All Paths Lead to the City Zero			Solve	Medium	Amazon+3	Breadth-First Search Depth-First Search+1
	1521. Find a Value of a Mysterious Function Closest to Target			Solve	Hard	American Express	Array Binary Search+2
	1647. Minimum Deletions to Make Character Frequencies Unique			Solve	Medium	Amazon+10	Greedy Hash Table+2
	2202. Maximize the Topmost Element After K Moves			Solve	Medium	American Express	Array Greedy
	2278. Percentage of Letter in String			Solve	Easy	American Express	String
	2317. Maximum XOR After Operations			Solve	Medium	American Express	Array Bit Manipulation+1

Two Sum

Easy✓ Solution📹 Video

Accenture+29

Array Hash Table

3Sum

Medium✓ Solution📹 Video

Adobe+21

Array Sorting Two Pointers

Search in Rotated Sorted Array

Medium✓ Solution📹 Video

Accenture+91

Array Binary Search

Valid Palindrome

Easy✓ Solution📹 Video

Adobe+8

String Two Pointers

Word Break

Medium✓ Solution📹 Video

Accenture+38

Array Dynamic Programming Hash Table+3

Linked List Cycle

Easy✓ Solution📹 Video

42gearMobilitySystems+131

Hash Table Linked List Two Pointers

Implement Stack using Queues

Easy✓ Solution📹 Video

Accenture+54

Design Queue Stack

Sliding Window Maximum

Hard✓ Solution📹 Video

Accion Labs India+66

Array Heap (Priority Queue)Monotonic Queue+2

Longest Increasing Subsequence

Medium✓ Solution📹 Video

Accenture+78

Array Binary Search Dynamic Programming

Design HashMap

Easy✓ Solution📹 Video

Adobe+26

Array Design Hash Function+2

Reorganize String

Medium✓ Solution📹 Video

Adobe+17

Counting Greedy Hash Table+3

Bus Routes

Hard✓ Solution📹 Video

Amazon+7

Array Breadth-First Search Hash Table

Ugly Number III

Medium📹 Video

American Express

Binary Search Combinatorics Math+1

Maximum Equal Frequency

Hard📹 Video

American Express

Array Hash Table

Reconstruct a 2-Row Binary Matrix

Medium📹 Video

American Express+1

Array Greedy Matrix

Reducing Dishes

Hard✓ Solution📹 Video

American Express+2

Array Dynamic Programming Greedy+1

Reorder Routes to Make All Paths Lead to the City Zero

Medium✓ Solution📹 Video

Amazon+3

Breadth-First Search Depth-First Search Graph

Find a Value of a Mysterious Function Closest to Target

Hard📹 Video

American Express

Array Binary Search Bit Manipulation+1

Minimum Deletions to Make Character Frequencies Unique

Medium✓ Solution📹 Video

Amazon+10

Greedy Hash Table Sorting+1

Maximize the Topmost Element After K Moves

Medium📹 Video

American Express

Percentage of Letter in String

Easy📹 Video

American Express

Maximum XOR After Operations

Medium📹 Video

American Express

Array Bit Manipulation Math