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18 problems · Easy to hard

Pressure-test your Python instincts.

Standalone problems with a blank workspace, instant output checks, optional hints, and XP for every clean solution.

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Challenge catalog

Choose your difficulty

Start easy to build momentum or jump to hard if you want an interview-style stretch.

Easy

Sum of Evens

30 XP
Easy

Vowel Counter

30 XP
Easy

Palindrome Check

35 XP
Medium

Second Largest

50 XP
Medium

Word Frequency

50 XP
Medium

Caesar Cipher

55 XP
Medium

Fibonacci Sequence

50 XP
Hard

Prime Hunter

75 XP
Hard

Matrix Diagonals

75 XP
Hard

API Rate Limiter

90 XP
Medium

Roman Numerals

55 XP
Medium

Balanced Brackets

55 XP
Medium

Run-Length Encoding

50 XP
Medium

Two Sum

60 XP
Hard

Group Anagrams

75 XP
Medium

Binary Search

55 XP
Hard

Merge Intervals

80 XP
Hard

Edit Distance

90 XP
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