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Emanuel Feld
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Advent of Code 2018
By
Emanuel Feld
Edited
Dec 10, 2018
Advent of Code 2018
[Day 25](https://adventofcode.com/2018/day/25)
[Day 18](https://adventofcode.com/2018/day/18)
[Day 21](https://adventofcode.com/2018/day/21)
Day 19
[Day 16](https://adventofcode.com/2018/day/16)
[Day 14](https://adventofcode.com/2018/day/14)
[Day 13](https://adventofcode.com/2018/day/13)
[Day 12](https://adventofcode.com/2018/day/12)
[Day 11](https://adventofcode.com/2018/day/11)
[Day 10](https://adventofcode.com/2018/day/10)
[Day 9](https://adventofcode.com/2018/day/9)
[Day 8](https://adventofcode.com/2018/day/8)
[Day 7](https://adventofcode.com/2018/day/7)
[Day 6](https://adventofcode.com/2018/day/6)
[Day 5](https://adventofcode.com/2018/day/5)
[Day 4](https://adventofcode.com/2018/day/4)
[Day 3](https://adventofcode.com/2018/day/3)
Advent of Code: [Day 2](https://adventofcode.com/2018/day/2)
[Day 1](https://adventofcode.com/2018/day/1)
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function
part1
(
s
)
{
let
stack
=
[
]
;
for
(
const
char
of
s
)
{
if
(
stack
.
length
&&
char
===
toggleCase
[
stack
.
slice
(
-
1
)
]
)
{
stack
.
pop
(
)
;
}
else
{
stack
.
push
(
char
)
;
}
}
return
stack
;
}
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reducedPolymer
=
part1
(
input
)
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reducedPolymer
.
length
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function
part2
(
s
)
{
let
lengths
=
[
]
;
for
(
const
char
of
alphabet
)
{
const
sWithoutChar
=
s
.
filter
(
c
=>
c
.
toLowerCase
(
)
!==
char
)
;
lengths
.
push
(
part1
(
sWithoutChar
)
.
length
)
;
}
return
Math
.
min
(
...
lengths
)
;
}
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part2
(
reducedPolymer
)
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