diff --git a/2020/10/input.txt b/2020/10/input.txt
new file mode 100644
index 0000000..ec74d95
--- /dev/null
+++ b/2020/10/input.txt
@@ -0,0 +1,99 @@
+18
+47
+144
+147
+124
+45
+81
+56
+16
+59
+97
+83
+75
+150
+33
+165
+30
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+27
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+108
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+38
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diff --git a/2020/10/medium.txt b/2020/10/medium.txt
new file mode 100644
index 0000000..e6376dc
--- /dev/null
+++ b/2020/10/medium.txt
@@ -0,0 +1,31 @@
+28
+33
+18
+42
+31
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+46
+20
+48
+47
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+23
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diff --git a/2020/10/small.txt b/2020/10/small.txt
new file mode 100644
index 0000000..ec4a03f
--- /dev/null
+++ b/2020/10/small.txt
@@ -0,0 +1,11 @@
+16
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diff --git a/2020/README.md b/2020/README.md
index 82bcb0e..af3bb95 100644
--- a/2020/README.md
+++ b/2020/README.md
@@ -12,12 +12,12 @@ asdf install
 
 ## Table of Contents
 
-|  S  |  M  |  T  |  W  |  T  |  F  |  S  |
-| :-: | :-: | :-: | :-: | :-: | :-: | :-: |
-|     |     | [1] | [2] | [3] | [4] | [5] |
-| [6] | [7] | [8] |  [9]  | 10  | 11  | 12  |
-| 13  | 14  | 15  | 16  | 17  | 18  | 19  |
-| 21  | 22  | 23  | 24  | 25  |     |     |
+|  S  |  M  |  T  |  W  |  T   |  F  |  S  |
+| :-: | :-: | :-: | :-: | :--: | :-: | :-: |
+|     |     | [1] | [2] | [3]  | [4] | [5] |
+| [6] | [7] | [8] | [9] | [10] | 11  | 12  |
+| 13  | 14  | 15  | 16  |  17  | 18  | 19  |
+| 21  | 22  | 23  | 24  |  25  |     |     |
 
 [asdf]: https://asdf-vm.com/#/
 [haskell]: https://www.haskell.org
@@ -30,3 +30,4 @@ asdf install
 [7]: ./07
 [8]: ./08
 [9]: ./09
+[10]: ./10