2020 Day 24 Complete

I made some minor changes to helpers/coordinate... I probably need to go
back and fix several previous years/days.

helpers/helpers.go

@@ -340,3 +340,17 @@ func IsPrime(value int) bool {
 	}
 	return value > 1
 }
+
+func Min(v1, v2 int) int {
+	if v1 < v2 {
+		return v1
+	}
+	return v2
+}
+
+func Max(v1, v2 int) int {
+	if v1 > v2 {
+		return v1
+	}
+	return v2
+}