[Problem] Array String Hash Table Intuition The question is pretty straightforward, it asks us to verify which words in array words1 are universal or not. Lets call the a...

[Problem] Array String String Matching Intuition Brute Force works because constraints are small. Constraints 1 <= words.length <= 100 1 <= words[i].length, pref.length <=...

[Problem] Array String Trie Rolling Hash String Matching Hash Function Intuition Brute Force works because constraints are small. Constraints: 1 <= words.length <= 50 1 <= wo...

[Problem] Array String String Matching Intuition This can be achieved using either a brute force approach or the more efficient KMP algorithm for substring matching. Alth...

[Problem] Array String Prefix Sum Intuition The brute force approach iterates over all pairs of boxes to compute the distance for each. Brute force will work in the question as the con...

[Problem] Array String Prefix Sum Intuition The problem involves shifting characters in a string based on multiple range-based operations. To handle these efficiently, we can use a pr...

[Problem] Hash Table String Bit Manipulation Prefix Sum Intuition A palindrome of length 3 will start and end with the same character. By identifying characters that occur at least tw...

[Problem] Array Prefix Sum Intuition Problem is about getting the sum of a given range. Prefix Sum can help us in that case. Recommended: A good reference for understanding prefix sum ...

[Problem] Array String Prefix Sum Intuition Valid string is string with starting and ending vowel. Let 1 : string is valid, 0: string invalid. For each string in words, we can store ...

[Problem] String Prefix Sum Intuition Valid string is string with starting and ending vowel. Let 1 : string is valid, 0: string invalid. For each string in words, we can store 1 if ...