Practice Problems

Problem of the Day: Integer Square Root — keep your streak alive!

Practice Problems — 800-1200

#ProblemTopicsDifficulty
29 Binary to Decimal math 900
33 Quotient and Remainder math 900
37 Can It Be a Triangle math geometry 900
40 Seconds to H:MM:SS implementation 900
44 Grid Walk implementation 900
51 Capitalize Every Word strings 900
53 Keep First Occurrences strings 900
56 Reverse the Word Order strings 900
57 Mirror Each Word strings 900
60 Caesar Shift strings 900
65 Longest Run of One Letter strings 900
67 Most Common Letter strings 900
69 Anagram Check strings 900
71 Pangram Check strings 900
84 Sort the Words strings sorting 900
85 Unique Word Count strings 900
88 Longest Block of Ones strings 900
92 Longest Zero Gap strings 900
122 Zeros to the Back implementation 900
130 Richest Row implementation 900
131 Diagonal Difference implementation 900
155 Coprime or Not math 900
165 Polygon Diagonals math 900
170 Arithmetic or Not math 900
172 Perfect Square math 900
226 Power of Two math bitwise 900
275 The King's Walk math 900
289 Sum of Squares math 900
290 Sum of Cubes math 900
291 Pentagonal Numbers math 900
292 Hexagonal Numbers math 900
298 Slippery Keyboard strings 900
306 Harshad Number math 900
307 Pronic Number math 900
316 Valid Hexadecimal implementation strings 900
320 Valid Clock Time implementation strings 900
321 Prefix Maxima implementation 900
322 Suffix Minima implementation 900
327 Compact a Sorted Array two-pointers 900
340 Multiples in a Range math 900
348 Ordinal Numbers implementation 900
350 Readable Numbers implementation 900
351 snake_case to camelCase strings 900
352 camelCase to snake_case strings 900
356 Peak Occupancy implementation 900
362 Elevator Log implementation 900
363 Clinic Queue prefix-sums 900
369 Enough Buses math 900
373 Fair Apples math 900
376 Hollow Square implementation 900