Add day 15

Author: LiquidFun

.aoc_tiles/tiles/2020/15.png

@@ -4,7 +4,7 @@ fn main() {
     let line = stdin().lines().last().unwrap().unwrap();
     let mut lookup: HashMap<_, _> = line.split(",").map(|n| n.parse().unwrap()).zip(1..).collect();
     let mut last = 0;
-    for i in lookup.len()+1..30000000 {
+    for i in lookup.len()+1..30_000_000 {
         last = i - lookup.insert(last, i).unwrap_or(i);
         if i == 2019 { println!("{}", last); }
     }

2020/15/15.rs

@@ -1,6 +1,6 @@
 <!-- AOC TILES BEGIN -->
 <h1 align="center">
-  Advent of Code - 178/450 ⭐
+  Advent of Code - 180/450 ⭐
 </h1>
 <h1 align="center">
   2023 - 50 ⭐
@@ -237,7 +237,7 @@
   <img src=".aoc_tiles/tiles/2021/25.png" width="161px">
 </a>
 <h1 align="center">
-  2020 - 28 ⭐
+  2020 - 30 ⭐
 </h1>
 <a href="2020/01/01.rs">
   <img src=".aoc_tiles/tiles/2020/01.png" width="161px">
@@ -281,6 +281,9 @@
 <a href="2020/14/14.rs">
   <img src=".aoc_tiles/tiles/2020/14.png" width="161px">
 </a>
+<a href="2020/15/15.rs">
+  <img src=".aoc_tiles/tiles/2020/15.png" width="161px">
+</a>
 <!-- AOC TILES END -->
 
 *The above tiles are clickable, leading to the solution of the corresponding day.*