day 03 and 04

day04/test.txt

+Card 1: 41 48 83 86 17 | 83 86  6 31 17  9 48 53
+Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19
+Card 3:  1 21 53 59 44 | 69 82 63 72 16 21 14  1
+Card 4: 41 92 73 84 69 | 59 84 76 51 58  5 54 83
+Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36
+Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11
\ No newline at end of file

flake.nix

@@ -15,6 +15,10 @@
       url = "./day02";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    day03 = {
+      url = "./day03";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     naersk = {
       url = "github:nix-community/naersk/master";
       inputs.nixpkgs.follows = "nixpkgs";