brainteaser

Nim Game

In Nim Game, determine if you can win given a certain number of stones, assuming optimal play from both players.

Bulb Switcher

Bulb Switcher challenges you to find how many bulbs remain on after n toggling rounds using a math-based insight.

Chalkboard XOR Game

The Chalkboard XOR Game is a game theory problem involving array manipulation and bitwise XOR, where players alternate e…

Divisor Game

Divisor Game is a game theory problem where players take turns subtracting divisors of a number n until one player loses…

Moving Stones Until Consecutive

Solve the "Moving Stones Until Consecutive" problem using math and brainteaser patterns by determining the minimum and m…

Airplane Seat Assignment Probability

Calculate the probability that the last passenger sits in their assigned seat using state transition dynamic programming…

Last Moment Before All Ants Fall Out of a Plank

This problem involves simulating ant movement on a plank to determine the last moment before all ants fall off.

Strictly Palindromic Number

Determine if a number is strictly palindromic in all bases from 2 to n minus 2 using two-pointer scanning and invariant …

Longest Subarray With Maximum Bitwise AND

Find the length of the longest subarray whose bitwise AND reaches the array's maximum value, combining array scanning wi…

Bitwise XOR of All Pairings

Compute the overall bitwise XOR from all pairings between two arrays using efficient array and bit manipulation techniqu…

Minimum Impossible OR

Find the smallest positive integer that cannot be formed from any subsequence OR combination in the array.

Movement of Robots

Calculate total distances between robots moving on a number line while accounting for collisions using array plus braint…

Construct the Longest New String

Maximize the length of a string built from AA, BB, and AB without creating triple repeats using DP and greedy logic.

Minimum Operations to Make the Integer Zero

This problem challenges you to compute the minimum operations to reduce an integer to zero using bit manipulation and st…

Vowels Game in a String

Solve the Vowels Game in a String using optimal moves and string analysis to predict the winner efficiently and accurate…

Count the Number of Computer Unlocking Permutations

Calculate the total valid unlocking sequences for computers based on their complexity using array and combinatorics logi…