[Rust/2015/03] Add solution

README.md

@@ -83,10 +83,10 @@
 |[**19**](https://adventofcode.com/2016/day/19) [<img height=12 src=".assets/py.svg">](Python/2016/19.py "Python solution for 2016/19")|[**20**](https://adventofcode.com/2016/day/20) [<img height=12 src=".assets/py.svg">](Python/2016/20.py "Python solution for 2016/20")|[**21**](https://adventofcode.com/2016/day/21) [<img height=12 src=".assets/py.svg">](Python/2016/21.py "Python solution for 2016/21")|[**22**](https://adventofcode.com/2016/day/22) [<img height=12 src=".assets/py.svg">](Python/2016/22.py "Python solution for 2016/22")|[**23**](https://adventofcode.com/2016/day/23) [<img height=12 src=".assets/py.svg">](Python/2016/23.py "Python solution for 2016/23")|[**24**](https://adventofcode.com/2016/day/24) [<img height=12 src=".assets/py.svg">](Python/2016/24.py "Python solution for 2016/24")|[**25**](https://adventofcode.com/2016/day/25) [<img height=12 src=".assets/py.svg">](Python/2016/25.py "Python solution for 2016/25")|
 |26|27|28|29|30|31||
 
-## [2015](https://adventofcode.com/2015) ([<img height=18 src=".assets/py.svg"> Python](Python/2015): 25/25 | [<img height=18 src=".assets/ua.png"> Uiua](Uiua/2015): 3/25 | [<img height=18 src=".assets/rs.svg"> Rust](Rust/2015): 2/25)
+## [2015](https://adventofcode.com/2015) ([<img height=18 src=".assets/py.svg"> Python](Python/2015): 25/25 | [<img height=18 src=".assets/rs.svg"> Rust](Rust/2015): 3/25 | [<img height=18 src=".assets/ua.png"> Uiua](Uiua/2015): 3/25)
 |Mo|Tu|We|Th|Fr|Sa|Su|
 |-|-|-|-|-|-|-|
-||[**1**](https://adventofcode.com/2015/day/1) [<img height=12 src=".assets/rs.svg">](Rust/2015/01.rs "Rust solution for 2015/01") [<img height=12 src=".assets/py.svg">](Python/2015/01.py "Python solution for 2015/01") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgotwqwuPUAoCuKKgygrMeKKl8KvMVwrKS8rCg== "Uiua solution for 2015/01")|[**2**](https://adventofcode.com/2015/day/2) [<img height=12 src=".assets/rs.svg">](Rust/2015/02.rs "Rust solution for 2015/02") [<img height=12 src=".assets/py.svg">](Python/2015/02.py "Python solution for 2015/02") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgriipwo4oqc4ouV4omgQHguKeKJoEBcbi4KCuKIqSgvKyspIOKJoeKKgygvw5d8w5cyLeKKgy_ihqUvK3zDt-KKgy_ihqUvw5d8w5cyLyviiaEvw5fil6sy4oavWzRdKQo= "Uiua solution for 2015/02")|[**3**](https://adventofcode.com/2015/day/3) [<img height=12 src=".assets/py.svg">](Python/2015/03.py "Python solution for 2015/03") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgrilr3iiIosInZePD4iCuKItSjiioLiioMoLeKIqT1AXixAdikoLeKIqT1APCxAPikpCgriiKko4qe74oqdKSDiioMo4oqC4oipKFwr4oqCMF8wKSDiiKko4o2J4oqiKeKHjC7ijYnihq_iioI6Ml8yw7cy4qe7LikgKFwr4oqCMF8wKQo= "Uiua solution for 2015/03")|[**4**](https://adventofcode.com/2015/day/4) [<img height=12 src=".assets/py.svg">](Python/2015/04.py "Python solution for 2015/04")|[**5**](https://adventofcode.com/2015/day/5) [<img height=12 src=".assets/py.svg">](Python/2015/05.py "Python solution for 2015/05")|[**6**](https://adventofcode.com/2015/day/6) [<img height=12 src=".assets/py.svg">](Python/2015/06.py "Python solution for 2015/06")|
+||[**1**](https://adventofcode.com/2015/day/1) [<img height=12 src=".assets/rs.svg">](Rust/2015/01.rs "Rust solution for 2015/01") [<img height=12 src=".assets/py.svg">](Python/2015/01.py "Python solution for 2015/01") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgotwqwuPUAoCuKKgygrMeKKl8KvMVwrKS8rCg== "Uiua solution for 2015/01")|[**2**](https://adventofcode.com/2015/day/2) [<img height=12 src=".assets/rs.svg">](Rust/2015/02.rs "Rust solution for 2015/02") [<img height=12 src=".assets/py.svg">](Python/2015/02.py "Python solution for 2015/02") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgriipwo4oqc4ouV4omgQHguKeKJoEBcbi4KCuKIqSgvKyspIOKJoeKKgygvw5d8w5cyLeKKgy_ihqUvK3zDt-KKgy_ihqUvw5d8w5cyLyviiaEvw5fil6sy4oavWzRdKQo= "Uiua solution for 2015/02")|[**3**](https://adventofcode.com/2015/day/3) [<img height=12 src=".assets/rs.svg">](Rust/2015/03.rs "Rust solution for 2015/03") [<img height=12 src=".assets/py.svg">](Python/2015/03.py "Python solution for 2015/03") [<img height=12 src=".assets/ua.png">](https://uiua.org/pad?src=JnNjCgrilr3iiIosInZePD4iCuKItSjiioLiioMoLeKIqT1AXixAdikoLeKIqT1APCxAPikpCgriiKko4qe74oqdKSDiioMo4oqC4oipKFwr4oqCMF8wKSDiiKko4o2J4oqiKeKHjC7ijYnihq_iioI6Ml8yw7cy4qe7LikgKFwr4oqCMF8wKQo= "Uiua solution for 2015/03")|[**4**](https://adventofcode.com/2015/day/4) [<img height=12 src=".assets/py.svg">](Python/2015/04.py "Python solution for 2015/04")|[**5**](https://adventofcode.com/2015/day/5) [<img height=12 src=".assets/py.svg">](Python/2015/05.py "Python solution for 2015/05")|[**6**](https://adventofcode.com/2015/day/6) [<img height=12 src=".assets/py.svg">](Python/2015/06.py "Python solution for 2015/06")|
 |[**7**](https://adventofcode.com/2015/day/7) [<img height=12 src=".assets/py.svg">](Python/2015/07.py "Python solution for 2015/07")|[**8**](https://adventofcode.com/2015/day/8) [<img height=12 src=".assets/py.svg">](Python/2015/08.py "Python solution for 2015/08")|[**9**](https://adventofcode.com/2015/day/9) [<img height=12 src=".assets/py.svg">](Python/2015/09.py "Python solution for 2015/09")|[**10**](https://adventofcode.com/2015/day/10) [<img height=12 src=".assets/py.svg">](Python/2015/10.py "Python solution for 2015/10")|[**11**](https://adventofcode.com/2015/day/11) [<img height=12 src=".assets/py.svg">](Python/2015/11.py "Python solution for 2015/11")|[**12**](https://adventofcode.com/2015/day/12) [<img height=12 src=".assets/py.svg">](Python/2015/12.py "Python solution for 2015/12")|[**13**](https://adventofcode.com/2015/day/13) [<img height=12 src=".assets/py.svg">](Python/2015/13.py "Python solution for 2015/13")|
 |[**14**](https://adventofcode.com/2015/day/14) [<img height=12 src=".assets/py.svg">](Python/2015/14.py "Python solution for 2015/14")|[**15**](https://adventofcode.com/2015/day/15) [<img height=12 src=".assets/py.svg">](Python/2015/15.py "Python solution for 2015/15")|[**16**](https://adventofcode.com/2015/day/16) [<img height=12 src=".assets/py.svg">](Python/2015/16.py "Python solution for 2015/16")|[**17**](https://adventofcode.com/2015/day/17) [<img height=12 src=".assets/py.svg">](Python/2015/17.py "Python solution for 2015/17")|[**18**](https://adventofcode.com/2015/day/18) [<img height=12 src=".assets/py.svg">](Python/2015/18.py "Python solution for 2015/18")|[**19**](https://adventofcode.com/2015/day/19) [<img height=12 src=".assets/py.svg">](Python/2015/19.py "Python solution for 2015/19")|[**20**](https://adventofcode.com/2015/day/20) [<img height=12 src=".assets/py.svg">](Python/2015/20.py "Python solution for 2015/20")|
 |[**21**](https://adventofcode.com/2015/day/21) [<img height=12 src=".assets/py.svg">](Python/2015/21.py "Python solution for 2015/21")|[**22**](https://adventofcode.com/2015/day/22) [<img height=12 src=".assets/py.svg">](Python/2015/22.py "Python solution for 2015/22")|[**23**](https://adventofcode.com/2015/day/23) [<img height=12 src=".assets/py.svg">](Python/2015/23.py "Python solution for 2015/23")|[**24**](https://adventofcode.com/2015/day/24) [<img height=12 src=".assets/py.svg">](Python/2015/24.py "Python solution for 2015/24")|[**25**](https://adventofcode.com/2015/day/25) [<img height=12 src=".assets/py.svg">](Python/2015/25.py "Python solution for 2015/25")|26|27|

Rust/2015/03.rs

@@ -0,0 +1,37 @@
+#![feature(test)]
+
+use aoc::grid::Direction;
+use rustc_hash::FxHashSet;
+
+type Input = Vec<Direction>;
+
+fn setup(input: &str) -> Input {
+    input.trim().chars().map(|b| b.into()).collect()
+}
+
+fn part1(input: &Input) -> usize {
+    input
+        .iter()
+        .scan((0, 0), |acc, &x| {
+            *acc = x.step_signed(*acc);
+            Some(*acc)
+        })
+        .chain([(0, 0)])
+        .collect::<FxHashSet<_>>()
+        .len()
+}
+
+fn part2(input: &Input) -> usize {
+    input
+        .iter()
+        .scan(((0, 0), (0, 0)), |(a, b), &x| {
+            std::mem::swap(a, b);
+            *a = x.step_signed(*a);
+            Some(*a)
+        })
+        .chain([(0, 0)])
+        .collect::<FxHashSet<_>>()
+        .len()
+}
+
+aoc::main!(2015, 3, ex: 1);

Rust/2015/main.rs

@@ -1,7 +1,7 @@
 aoc::year! {
     "01.rs",
     "02.rs",
-    // "03.rs",
+    "03.rs",
     // "04.rs",
     // "05.rs",
     // "06.rs",

Rust/Cargo.toml

@@ -49,6 +49,9 @@ path = "2015/01.rs"
 [[bin]]
 name = "2015_02"
 path = "2015/02.rs"
+[[bin]]
+name = "2015_03"
+path = "2015/03.rs"
 
 # 2020
 [[bin]]