Refactor days 1-2, optimize day 3 part 1 with suffix max

Cargo.lock

@@ -23,6 +23,7 @@ version = "0.12.0"
 dependencies = [
  "chrono",
  "dhat",
+ "itertools",
  "pico-args",
  "tinyjson",
 ]
@@ -126,6 +127,12 @@ dependencies = [
  "thousands",
 ]
 
+[[package]]
+name = "either"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
+
 [[package]]
 name = "gimli"
 version = "0.28.1"
@@ -155,6 +162,15 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.9"