move input parsing into vm class

Day7.cs

@@ -12,8 +12,7 @@ namespace aoc2019
         private readonly IntCodeVM[] Amplifiers = new IntCodeVM[5];
         public Day7()
         {
-            var input = Input.First().Split(',').Select(long.Parse);
-            for (var i = 0; i < 5; i++) Amplifiers[i] = new IntCodeVM(input);
+            for (var i = 0; i < 5; i++) Amplifiers[i] = new IntCodeVM(Input.First());
         }
 
         

Day9.cs

@@ -12,7 +12,7 @@ namespace aoc2019
 
         public Day9()
         {
-            vm = new IntCodeVM(Input.First().Split(',').Select(long.Parse));
+            vm = new IntCodeVM(Input.First());
         }
 
         public override string Part1()

lib/IntCodeVM.cs

@@ -12,12 +12,12 @@ namespace aoc2019.lib
         private readonly long[] program;
         public Queue<long> input, output;
 
-        public IntCodeVM(IEnumerable<long> tape)
+        public IntCodeVM(string tape)
         {
             i = 0;
             relbase = 0;
-            program = tape.ToArray();
-            memory = tape.ToArray();
+            program = tape.Split(',').Select(long.Parse).ToArray();
+            memory = program;
             input = new Queue<long>();
             output = new Queue<long>();
         }