Day 2 solutions!

src/s2a.d

@@ -0,0 +1,15 @@
+module s2a;
+import util;
+
+void main() {
+    readText("input/2.txt").strip.splitter("\n")
+        .map!(l => l.strip.splitter(" ").map!(c => c.to!char).array)
+        .map!((c) {
+            int sOp = c[0] - 'A' + 1;
+            int sMe = c[1] - 'X' + 1;
+            if (sMe == sOp % 3 + 1) return 6 + sMe;
+            if (sOp == sMe % 3 + 1) return sMe;
+            return 3 + sMe;
+        })
+        .sum.writeln;
+}

src/s2b.d

@@ -0,0 +1,27 @@
+module s2b;
+import util;
+
+const ROCK = 1;
+const PAPER = 2;
+const SCISSORS = 3;
+
+void main() {
+    readText("input/2.txt").strip.splitter("\n")
+        .map!(l => l.strip.splitter(" ").map!(c => c.to!char).array)
+        .map!((c) {
+            int sOp = c[0] - 'A' + 1;
+            int sEnd = c[1];
+            if (sEnd == 'X') {
+                int sMe = sOp - 1;
+                if (sMe < 1) sMe = 3;
+                return sMe;
+            }
+            if (sEnd == 'Z') {
+                int sMe = sOp + 1;
+                if (sMe > 3) sMe = 1;
+                return 6 + sMe;
+            }
+            return 3 + sOp;
+        })
+        .sum.writeln;
+}

src/util.d

@@ -11,3 +11,4 @@ public import std.conv;
 public import std.path;
 public import std.uni;
 public import std.array;
+public import std.format;