Code Challenges

Get better at coding with practice problems.

Coding Challenges

Select a problem, write code, run test cases, and submit your solution.

Showing 13 of 13 problems

Implement the subsetsCountByBitmask method that returns how many subsets can be formed using bitmasking. Solved

Implement the maximumXorPairSimple method that returns the maximum XOR value obtainable from any pair. Solved

Implement the hammingDistanceValues method that returns the number of bit positions where two integers differ. Solved

Implement the powerOfFourCheck method that checks whether a number is a power of four. Solved

Implement the missingNumberXorImportant method that finds the missing number using XOR logic. Solved

Intermediate

Implement the bitwiseAndRange method that returns the bitwise AND of all numbers in the given range. Solved

Implement the reverseBitsSimple method that returns the integer formed after reversing the bits. Solved

Implement the countBitsUpToNSum method that returns the total count of set bits for all numbers from 0 to n. Solved

Intermediate

Implement the singleNumberTwoValuesCount method that counts the two values that appear once when others appear twice. Solved

Implement the singleNumberUsingXor method that returns the number that appears once using XOR logic. Solved

Implement the fastPowerModulo method that calculates base raised to exponent under a given modulo efficiently. Solved