Letter Tile Possibilities
Explore generating unique letter tile sequences by applying subset and permutation techniques. Understand constraints and practice implementing efficient algorithms to solve this common interview problem.
We'll cover the following...
We'll cover the following...
Statement
You are given a string, tiles, consisting of uppercase English letters. You can arrange the tiles into sequences of any length (from 1 to the length of tiles), and each sequence must include at most one tile, tiles[i], from tiles.
Your task is to return the number of possible non-empty unique sequences you can make using the letters represented on tiles[i]. ...