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Valid Palindrome
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Filter and Reverse
Two Pointers
Input
Valid
Valid 2
Invalid 1
Invalid 2
Custom
s
=
Madam
s
0
1
2
3
4
M
a
d
a
m
filtered
reversed
s
0
1
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3
4
M
a
d
a
m
filtered
reversed
s
0
1
2
3
4
M
a
d
a
m
c
filtered
m
reversed
s
0
1
2
3
4
M
a
d
a
m
c
filtered
m
a
d
reversed
s
0
1
2
3
4
M
a
d
a
m
c
filtered
m
a
d
a
reversed
s
0
1
2
3
4
M
a
d
a
m
c
filtered
m
a
d
a
m
reversed
s
0
1
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3
4
M
a
d
a
m
filtered
m
a
d
a
m
k
reversed
m
a
d
a
m
k
s
0
1
2
3
4
M
a
d
a
m
filtered
m
a
d
a
m
k
reversed
m
a
d
a
m
k
s
0
1
2
3
4
M
a
d
a
m
filtered
m
a
d
a
m
k
reversed
m
a
d
a
m
k
s
0
1
2
3
4
M
a
d
a
m
filtered
m
a
d
a
m
k
reversed
m
a
d
a
m
k
s
0
1
2
3
4
M
a
d
a
m
filtered
m
a
d
a
m
reversed
m
a
d
a
m
palindrome
algo
master
.
io
Step:
Start: check whether "Madam" reads the same both ways
0 / 12
Input
Valid
Valid 2
Invalid 1
Invalid 2
Custom
s
=
Madam
0 / 12
algo
master
.
io
Step:
Start: check whether "Madam" reads the same both ways
