Medium
Quiz
#139 Word Break
APPROACH
Given a string s and a dictionary wordDict, determine whether s can be segmented into a space-separated sequence of words all drawn from wordDict. Return true if possible.
Words from the dictionary may be reused any number of times.
Example 1:
Input: s = "leetcode", wordDict = ["leet","code"]
Output: true
Explanation: Return true because "leetcode" can be segmented as "leet code".
Example 2:
Input: s = "applepenapple", wordDict = ["apple","pen"]
Output: true
Explanation: Return true because "applepenapple" can be segmented as "apple pen apple".
Note that you are allowed to reuse a dictionary word.
Example 3:
Input: s = "catsandog", wordDict = ["cats","dog","sand","and","cat"]
Output: false
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What is the optimal approach for this problem?