Yearly Archives: 2026
Find the Element that Appears Thrice
Title: Find the Element that Appears ThriceAn array where every value shows up exactly twice except for one value that shows up exactly three...
Find All Elements that Appear Exactly Twice
Title: Find All Elements that Appear Exactly TwiceCounting how often each value shows up in an array is one of the most common building...
Find Two Odd-Occurring Elements in an Array
Title: Find Two Odd-Occurring Elements in an ArrayAn array where every element shows up an even number of times except for exactly two values...
Find the Only Odd-Occurring Element in an Array
Title: Find the Only Odd-Occurring Element in an ArrayImagine an array where every number shows up an even number of times, except for exactly...
Find the Repeating and the Missing Number
Title: Find the Repeating and the Missing NumberThe repeating-and-missing problem is a favorite array question in Java interviews because it forces you to reason...
Find Two Missing Numbers in an Array
Title: Find Two Missing Numbers in an ArrayIn this guide, you will learn how to find two missing numbers in an array that should...
Find the Missing Number in an Array of 1 to N
Title: Find the Missing Number in an Array of 1 to NThe missing-number problem is a classic warm-up for anyone preparing arrays and interview...
Find All Duplicates in an Array of 1 to N
Title: Find All Duplicates in an Array of 1 to NFinding every value that repeats inside an array whose elements are drawn from the...
Find Boyer-Moore Majority Vote in Java
Title: Find Boyer-Moore Majority Vote in JavaIn this guide, you will learn how to find the majority element of an array using the Boyer-Moore...
Find Majority Element in an Array
Title: Find Majority Element in an ArrayFinding the majority element in an array, the value that appears more than half the time, is a...