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add-bold-tag-in-string.py
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add-bold-tag-in-string.py
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class Solution:
def addBoldTag(self, s: str, dict: List[str]) -> str:
if not s or not dict:
return s
dict_set = set(dict)
dict_max_len = max([len(item) for item in dict])
intervals = []
for left_pos in range(len(s)):
for right_pos in range(left_pos, min(len(s), left_pos + dict_max_len)):
if s[left_pos:right_pos + 1] in dict_set:
intervals.append((left_pos, right_pos))
stack = []
for interval in intervals:
if stack:
prev_left, prev_right = stack[-1]
left, right = interval
if left <= prev_right + 1:
stack.pop()
stack.append((prev_left, max(right, prev_right)))
else:
stack.append(interval)
else:
stack.append(interval)
result = ""
prev_right = 0
for pos in range(len(stack)):
left, right = stack[pos]
result += s[prev_right:left]
result += "<b>"
result += s[left:right + 1]
result += "</b>"
prev_right = right + 1
result += s[prev_right:]
return result