1 files changed, 22 insertions, 3 deletions
diff --git a/challenge-285/deadmarshal/modula-3/ch1/src/Ch1.m3 b/challenge-285/deadmarshal/modula-3/ch1/src/Ch1.m3
index 8f6f2ea985..0cf0ee508a 100644
--- a/challenge-285/deadmarshal/modula-3/ch1/src/Ch1.m3
+++ b/challenge-285/deadmarshal/modula-3/ch1/src/Ch1.m3
@@ -1,6 +1,6 @@
 MODULE Ch1 EXPORTS Main;
 
-IMPORT SIO;
+IMPORT SIO,TextIntTbl;
 
 VAR
   A1 := ARRAY[0..2],[0..1] OF TEXT{
@@ -9,8 +9,27 @@ VAR
   ARRAY[0..1] OF TEXT{"C","A"}};
   A2 := ARRAY[0..0],[0..1] OF TEXT{
   ARRAY OF TEXT{"A","Z"}};
-  
+
+PROCEDURE NoConnection(VAR A:ARRAY OF ARRAY OF TEXT):TEXT =
+  VAR
+    Destinations,Sources := NEW(TextIntTbl.Default).init(NUMBER(A));
+    It:TextIntTbl.Iterator;
+    K:TEXT := "";
+    V:INTEGER;
+  BEGIN
+    FOR I := FIRST(A) TO LAST(A) DO
+      EVAL Sources.put(A[I,0],1);
+      EVAL Destinations.put(A[I,1],1);
+    END;
+    It := Destinations.iterate();
+    WHILE It.next(K,V) DO
+      IF Destinations.get(K,V) THEN RETURN K END
+    END;
+    RETURN ""
+  END NoConnection;
+
 BEGIN
-  
+  SIO.PutText(NoConnection(A1) & "\n");
+  SIO.PutText(NoConnection(A2) & "\n")
 END Ch1.