Patterns
simulation

35 problems

#

Title

Acceptance

Difficulty

1

Pangram (easy)
string
hash set
counting
+1 more

30.9%

easy

2

Valid Palindrome (easy)
string
two pointers
simulation

22.5%

easy

3

array
string
two pointers
+2 more

27.7%

easy

4

16.7%

Med.

5

fast and slow pointers
simulation
hash set
+1 more

47.1%

Med.

6

fast and slow pointers
array
simulation
+1 more

17.2%

hard

7

linked list
two pointers
simulation

22.8%

Med.

8

bit manipulation
simulation
string

46.7%

Med.

9

stack
sorting
simulation
+1 more

69.7%

easy

10

stack
string
simulation
+1 more

25.2%

Med.

11

37.0%

Med.

12

0.0%

easy

13

hash map
string
counting
+2 more

0.0%

easy

14

matrix
simulation
counting
+1 more

27.2%

easy

15

two heaps
priority queue
heap
+1 more

15.1%

Med.

16

array
bitwise xor
hash map
+2 more

82.5%

easy

17

58.2%

hard

18

greedy algorithm
priority queue
heap
+2 more

52.7%

easy

19

top k elements
heap
priority queue
+2 more

52.9%

Med.

20

greedy algorithm
priority queue
heap
+3 more

33.1%

hard

21

string
stack
greedy algorithm
+2 more

48.3%

Med.

22

backtracking
recursion
matrix
+2 more

74.3%

hard

23

string
trie
sorting
+3 more

30.5%

easy

24

array
hash map
sorting
+2 more

83.4%

easy

25

merge intervals
array
binary search
+2 more

20.2%

Med.

26

prefix sum
array
simulation

42.7%

easy

27

array
prefix sum
simulation

67.0%

easy

28

73.9%

Med.

29

simulation
counting
array

92.1%

easy

30

stack
recursion
string
+1 more

45.1%

Med.

31

matrix
hash set
matrix traversal
+3 more

35.7%

Med.

32

array
prefix sum
simulation

64.4%

Med.

33

linked list
two pointers
simulation

30.0%

Med.

34

string
serialize and deserialize
array
+1 more

66.2%

Med.

35

string
stack
dynamic programming
+2 more

15.5%

hard