Practice Problems

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

Practice Problems — strings

#ProblemTopicsDifficulty
49 Shout It implementation strings 800
50 Swap the Case implementation strings 800
52 Strip the Vowels strings 800
61 Alternating Caps strings 800
62 Build the Acronym strings 800
63 Count a Given Character strings 800
64 Letters versus Digits strings 800
68 Vowels and Consonants strings 800
72 Isogram Check strings 800
83 The Longest Word strings 800
89 Count the Transitions strings 800
295 ROT13 strings 800
296 Atbash Mirror strings 800
389 Cut and Dot strings 800
391 Pairwise Swap strings 800
392 Words Containing C strings 800
4 Reverse a String implementation strings 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
298 Slippery Keyboard strings 900
316 Valid Hexadecimal implementation strings 900
320 Valid Clock Time implementation strings 900
351 snake_case to camelCase strings 900
352 camelCase to snake_case strings 900
386 Grouped with Dashes strings 900
388 Tidy the Spaces strings 900
424 How Many Blocks strings 900
438 The Repeating Banner math strings 900
5 Count the Vowels strings 1000
46 Balanced Brackets implementation strings 1000
54 Run-Length Encoding strings 1000
55 Run-Length Decoding strings 1000
58 Rotate Left by K strings 1000
66 First Unique Character strings 1000
86 Most Frequent Word strings 1000
87 Word Chain strings 1000
302 Shortest Words First strings sorting 1000
315 Valid Integer implementation strings 1000
317 Strong Enough Password implementation strings 1000