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LC_Backspace_String_Compare.py
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LC_Backspace_String_Compare.py
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"""
844. Backspace String Compare
Given two strings S and T, return if they are equal when both are typed into empty text editors. # means a backspace character.
Example 1:
Input: S = "ab#c", T = "ad#c"
Output: true
Explanation: Both S and T become "ac".
Example 2:
Input: S = "ab##", T = "c#d#"
Output: true
Explanation: Both S and T become "".
Example 3:
Input: S = "a##c", T = "#a#c"
Output: true
Explanation: Both S and T become "c".
Example 4:
Input: S = "a#c", T = "b"
Output: false
Explanation: S becomes "c" while T becomes "b".
"""
class Solution(object):
def backspaceCompare(self, S, T):
"""
:type S: str
:type T: str
:rtype: bool
"""
S_Stack = []
T_Stack = []
for char in S:
if (char == "#"):
if (len(S_Stack)):
S_Stack.pop()
else:
S_Stack.append(char)
for char in T:
if (char == "#"):
if (len(T_Stack)):
T_Stack.pop()
else:
T_Stack.append(char)
if ("".join(T_Stack) == "".join(S_Stack)):
return True
else:
return False
mysol =Solution()
S = "ab#c"
T = "ad#c"
print (mysol.backspaceCompare(S,T))
S = "ab##"
T = "c#d#"
print (mysol.backspaceCompare(S,T))
S = "a##c"
T = "#a#c"
print (mysol.backspaceCompare(S,T))
S = "a#c"
T = "b"
print (mysol.backspaceCompare(S,T))