PrepFlow
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PrepFlow
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Companies
De Shaw
String
String
0/20 solved
Valid Parentheses
EASY
Generate Parentheses
MEDIUM
Letter Combinations of a Phone Number
MEDIUM
Edit Distance
MEDIUM
Remove K Digits
MEDIUM
Interleaving String
MEDIUM
Basic Calculator
HARD
Basic Calculator II
MEDIUM
Open the Lock
MEDIUM
Number of Substrings Containing All Three Characters
MEDIUM
Number of Wonderful Substrings
MEDIUM
Freedom Trail
HARD
Find the Shortest Superstring
HARD
Minimum Number of Pushes to Type Word II
MEDIUM
Count of Integers
HARD
Sum Game
MEDIUM
Maximum Deletions on a String
HARD
Shortest String That Contains Three Strings
MEDIUM
Query Kth Smallest Trimmed Number
MEDIUM
Minimum Deletions to Make String K-Special
MEDIUM