Practice Problems

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

Practice Problems

#ProblemTopicsDifficulty
73 Is It a Subsequence strings two-pointers 1100
76 Longest Common Prefix strings 1100
93 Static Range Sums prefix-sums 1100
114 Sort by Absolute Value sorting 1100
118 Widest Gap sorting 1100
119 Third Distinct Maximum implementation 1100
129 Alternating Parity Stretch implementation 1100
147 Perfect Number math 1100
152 GCD of Everything math number-theory 1100
167 Counting All Subsets math combinatorics 1100
173 Triangular Number math 1100
178 Multiplicative Persistence math implementation 1100
201 Climbing the Staircase dp 1100
225 Flips to Convert bitwise 1100
248 Count the Leaves trees 1100
258 Top K Values heap sorting 1100
264 Count Evens in a Range prefix-sums 1100
265 Count Negatives in a Range prefix-sums 1100
271 Common Elements implementation 1100
277 The Bishop's Colors math 1100
299 Order by Digit Sum sorting 1100
300 Order by Set Bits sorting 1100
310 Factorion math 1100
311 Ugly Number math 1100
328 Closest to the Origin math geometry 1100
334 Right Triangle math geometry 1100
347 Spreadsheet Column Number math implementation 1100
359 Login Streak sorting 1100
364 Candles from Stubs math 1100
365 Working Together math 1100
371 Wrapper Promotion math 1100
390 Longest Common Suffix strings 1100
393 Count Squares in a Range math 1100
404 The K-th Pentagonal Number math 1100
406 The K-th Hexagonal Number math 1100
417 Even-Product Pairs math 1100
420 Raise Everyone Up math 1100
434 Power of Four math bitwise 1100
437 A Fixed Remainder math 1100
439 Digit Duel implementation 1100
442 Rearrange into a Palindrome strings 1100
453 Increasing Array greedy 1100
489 Anti-Diagonal Sums implementation 1100
490 Toeplitz Matrix implementation 1100
500 Sum of the First K Fibonacci Numbers math 1100
501 Stacking Pentagons math 1100
502 Stacking Hexagons math 1100
31 Roman Numerals implementation 1200
74 Rotation of Each Other strings 1200
75 Three Kinds of Brackets strings stack 1200