Given a telephone number, find all the permutations of the letters assuming 1=abc, 2=def, etc.
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You are given intervals of contiguous integers, like [1, 10), [15, 25), [40, 50), which are non-overlapping and of a fixed size. Design a data structure to store these intervals and have the operations of insert, delete, and find functions
It was a mathematical questions about finding the greatest number (but less than the given number) by reordering the digits in the number.
Check if a string is a pallindrome Find the longest distance between any two nodes in a binary tree.
2 leetcode easies, 2 leetcode mediums (Codesignal)
Sort a matrix in diagonal order after manipulation
Max Profit Buy Sell Stocks, K Closest Points to Origin and Copy List with Random Pointers
Diameter of binary tree. Find number of islands. Meeting room problem.
Coding question: Q. Given two non-negative integers low and high. Return the count of odd numbers between low and high
Reverse a link list.
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