题目：原题链接（中等）
标签：字典树、哈希表
解法 | 时间复杂度 | 空间复杂度 | 执行用时 |
Ans 1 (Python) | ( D + S ) | O ( D ) | 56ms (97.96%) |
Ans 2 (Python) | |||
Ans 3 (Python) |
解法一（字典树）：
class Solution:
def replaceWords(self, dictionary: List[str], sentence: str) -> str:
root = {}
for word in dictionary:
now = root
for ch in word:
if ch not in now:
now[ch] = {}
now = now[ch]
now["@"] = None
def replace(w):
n = root
for i, c in enumerate(w):
if "@" in n:
return w[:i]
if c not in n:
return w
else:
n = n[c]
return w
return " ".join(replace(word) for word in sentence.split(" "))
