Solution: Word Formation From a Dictionary Using Trie

The solution to determining if a word can be formed by combining two words from a dictionary utilizes a trie data structure, which organizes words based on their prefixes for efficient searching. By inserting all dictionary words into the trie, the algorithm can quickly check for complete prefixes and their corresponding remaining strings. This approach significantly reduces time complexity to O(m + n), where m is the number of words in the dictionary and n is the length of the target word, while the space complexity remains O(m).