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Programming Challenges

Strengthen your problem-solving skills with language-neutral challenges you can solve in Python, C++, or C#. Every submission is checked by automated tests and reviewed by AI.

  • Python · C++ · C#
  • Automated tests
  • AI code review
  • Community solutions
Learning path
150
Challenges
2
Solutions shared
3
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All challenges

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84 challenges
Easy

Running Sum

Replace each value with the total so far.

ArraysBeginnerLearning-path
Python C++ C#
0 solved
No solutions yet
Easy

Greatest Common Divisor

Find the largest number that divides both values.

BeginnerNumbersStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Sum of Multiples

Add values below a limit divisible by any supplied factor.

BeginnerNumbers
Python C++ C#
0 solved
No solutions yet
Easy

Count Vowels

Count the vowels in a piece of text.

BeginnerStringsStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Palindrome String

Check whether text reads the same forwards and backwards.

BeginnerStringsStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Odd, Even, or Neither

Classify a number by whether it is an odd integer, an even integer, or neither.

BeginnerNumbers
Python C++ C#
0 solved
No solutions yet
Easy

Anagram Check

Check whether two phrases use the same letters.

BeginnerStringsStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Title Case

Capitalize the first letter of every word.

BeginnerStringsStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Second Largest Value

Find the second largest distinct value.

ArraysBeginnerStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Reverse a String

Return the characters of a string in reverse order.

BeginnerStringsStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Array Maximum

Find the largest value in a list.

ArraysBeginnerStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Count Words

Count the words in a sentence.

BeginnerStringsStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Array Minimum

Find the smallest value in a list.

ArraysBeginnerStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Rotate Array

Rotate a list to the right by some steps.

ArraysBeginnerStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Move Zeroes

Move every zero to the end while keeping the other order.

ArraysBeginnerStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Array Average

Compute the average of a list of numbers.

ArraysBeginnerStudent-beginner
Python C++ C#
0 solved
No solutions yet
Easy

Fizz Buzz

Build a sequence using divisibility by 3 and 5.

BeginnerNumbers
Python C++ C#
0 solved
No solutions yet
Easy

Difference of Squares

Subtract the sum of squares from the square of the sum.

Beginnermath
Python C++ C#
0 solved
No solutions yet