Letter Tile Possibilities
Explore how to calculate the number of unique non-empty sequences from a string of tiles using subsets and permutations. Understand constraints and problem-solving strategies to improve your coding interview skills in pattern recognition and sequence generation.
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]. ...