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Priority
HackWithInfy Prep • 64 items
All (64)
Easy (10)
Medium (35)
Hard (14)
1
Last Stone Weight II (Antimatter Particles)
Medium
Dynamic Programming
Solve →
2
Playing with Prime
Hard
Math (Digit DP)
Solve →
3
Minimum String Rotation
Medium
Strings
Solve →
4
Split Array (bitwise OR)
Medium
Divide and Conquer
Solve →
5
Food Stamps
Unknown
Medium (Easy)
Solve →
6
MSS With K Swaps
Unknown
Medium
Solve →
7
Lock and Parity Assignment
Hard
Graphs (Matching)
Solve →
8
Layered Path Maximization (Penalties)
Hard
Graphs
Solve →
9
Ways to Choose K Elements (sum ≤ M)
Unknown
Hard
Solve →
10
Binary String Suffix Flips
Unknown
Medium
Solve →
11
Tree Similarity Count
Unknown
Hard
Solve →
12
Subsequence with ≤1 Sign Change
Medium
Dynamic Programming
Solve →
13
Max Score Doubling Subarray
Medium
Arrays
Solve →
14
Echo Path in Graph
Hard
Graphs
Solve →
15
Longest Palindromic Subsequence
Medium
Dynamic Programming
Solve →
16
House Robber I
Medium
Dynamic Programming
Solve →
17
House Robber II
Medium
Dynamic Programming
Solve →
18
Min Cost Climbing Stairs
Easy
Dynamic Programming
Solve →
19
Decode Ways
Medium
Dynamic Programming
Solve →
20
Minimum Path Sum
Medium
Dynamic Programming
Solve →
21
Dungeon Game
Hard
Dynamic Programming
Solve →
22
Triangle (Minimum Total)
Medium
Dynamic Programming
Solve →
23
Partition Equal Subset Sum
Medium
Dynamic Programming
Solve →
24
Target Sum
Medium
Dynamic Programming
Solve →
25
Coin Change
Medium
Dynamic Programming
Solve →
26
Coin Change II
Medium
Dynamic Programming
Solve →
27
Longest Increasing Subsequence
Medium
Dynamic Programming
Solve →
28
Longest Common Subsequence
Medium
Dynamic Programming
Solve →
29
Longest Palindromic Substring
Medium
String
Solve →
30
Edit Distance
Hard
Dynamic Programming
Solve →
31
Merge Intervals
Medium
Arrays
Solve →
32
Two Sum
Easy
Hash Table
Solve →
33
Longest Consecutive Sequence
Medium
Hash Table
Solve →
34
Largest Rectangle in Histogram
Hard
Stack
Solve →
35
Daily Temperatures
Medium
Stack
Solve →
36
Task Scheduler
Medium
Greedy
Solve →
37
Move Brackets (Codeforces 1374C)
Medium
Greedy
Solve →
38
Pashmak and Flowers (CF 459B)
Easy
Math
Solve →
39
Make Equal with Operations (CF 1296B)
Easy
Greedy
Solve →
40
Reorder the Array (CF 1607B)
Easy
Math
Solve →
41
N-Queens
Hard
Backtracking
Solve →
42
Sudoku Solver
Hard
Backtracking
Solve →
43
Permutations
Medium
Backtracking
Solve →
44
Maximize Score After N Operations
Hard
Dynamic Programming
Solve →
45
Count Inversions
Hard
Divide and Conquer
Solve →
46
Maximum XOR of Two Numbers
Medium
Trie
Solve →
47
Power of Two
Easy
Bits
Solve →
48
T-Primes (CF 230B)
Easy
Math
Solve →
49
Divisibility by 8 (CF 550C)
Easy
Brute Force
Solve →
50
Interesting Drink (CF 706B)
Easy
Binary Search
Solve →
51
Reconstruct Itinerary
Medium
Graph
Solve →
52
Koko Eating Bananas
Medium
Binary Search
Solve →
53
Aggressive Cows
Medium
Binary Search
Solve →
54
Split Array Largest Sum
Hard
Dynamic Programming
Solve →
55
Max Subarray Sum with Size Constraint (CF 996A)
Medium
Sliding Window
Solve →
56
Number of Pairs (CF 1538C)
Medium
Two Pointers
Solve →
57
K-th Not Divisible (CF 1352C)
Easy
Binary Search
Solve →
58
Longest Substring Without Repeating
Medium
Sliding Window
Solve →
59
Minimum Window Substring
Hard
Sliding Window
Solve →
60
Sliding Window Maximum
Hard
Deque
Solve →
61
Subarray Sum Equals K
Medium
Hash Table
Solve →
62
Backtracking Subsequence Problem
Medium
Backtracking
Solve →
63
Pseudo-Polynomial DP (coin flips)
Medium
DP
Solve →
64
General DP/Graph Patterns
Medium
Various (DP/Graphs)
Solve →