Practice Problems

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

Practice Problems

#ProblemTopicsDifficulty
454 Beautiful Permutation math implementation 1300
456 Emptying Two Piles math 1300
458 Canonical Palindrome strings 1300
462 Tower of Hanoi: The Moves implementation 1300
465 Order of Elimination implementation 1300
479 Trade Every Rise greedy 1300
498 Zigzag Diagonals implementation 1300
517 Local or Global math implementation 1300
656 No Zero Digit digit-dp 1300
672 Count Positives in Range prefix-sums 1300
673 Count Multiples of 3 in Range prefix-sums 1300
675 Count Primes in Range prefix-sums 1300
686 Joining the Ropes greedy heap 1300
700 No Repeated Neighbour Digit digit-dp 1300
706 Count Small-Magnitude in Range prefix-sums 1300
708 Count Even-Digit-Sum in Range prefix-sums 1300
724 Divisible by Digit Count math digit-dp 1300
758 Count Multiples of 7 prefix-sums 1300
759 Count Perfect Cubes prefix-sums 1300
760 Count Single-Digit Values prefix-sums 1300
784 Count Squarefree in Range prefix-sums 1300
785 Count Multiples of 6 prefix-sums 1300
786 Count Three-Digit Values prefix-sums 1300
787 Count Palindromic Values prefix-sums 1300
897 Range Prime Count prefix-sum 1300
898 Range Perfect-Square Count prefix-sum 1300
899 Range Power-of-Two Count prefix-sum 1300
900 Range Multiple-of-Three Count prefix-sum 1300
901 Range Even-Digit-Sum Count prefix-sum 1300
903 Row Coloring, 3 Colors combinatorics 1300
904 Row Coloring, 4 Colors combinatorics 1300
905 Row Coloring, 5 Colors combinatorics 1300
47 The Josephus Survivor math implementation 1400
77 Lexicographically Smallest Rotation strings 1400
79 Longest Substring Without Repeats strings two-pointers 1400
95 Zero-Sum Subarrays prefix-sums 1400
101 Most Distinct Window sliding-window 1400
102 Longest Affordable Streak sliding-window two-pointers 1400
104 At Most K Odd Numbers two-pointers 1400
105 Longest Distinct Stretch two-pointers 1400
109 Boats for Two greedy two-pointers 1400
110 K-th of Two Sorted Arrays two-pointers 1400
121 Best Product of Three math sorting 1400
125 Reverse One Segment implementation sorting 1400
133 Spiral Order implementation 1400
136 Merged Interval Count intervals sorting 1400
137 Total Covered Length intervals sorting 1400
146 Sum of Divisors math number-theory 1400
149 Goldbach Split math number-theory 1400
150 Twin Prime Pairs math number-theory 1400