wip PE1

PE1/Pair.java

@@ -0,0 +1,22 @@
+public class Pair<T, S> {
+    private T fst;
+    private S snd;
+
+    public Pair(T fst, S snd) {
+        this.fst = fst;
+        this.snd = snd;
+    }
+
+    public T getFst() {
+        return this.fst;
+    }
+
+    public S getSnd() {
+        return this.snd;
+    }
+
+    @Override
+    public String toString() {
+        return this.fst + "; " + this.snd;
+    }
+}

PE1/Queueable.java

@@ -0,0 +1,3 @@
+public interface Queueable<T> {
+
+}

PE1/Sequeue.java

@@ -0,0 +1,12 @@
+public class Sequeue<T> extends Pair<T, Queueable<T>> implements Queueable {
+
+    public Sequeue(T fst, Queueable<T> snd) {
+        super(fst, snd);
+        // TODO Auto-generated constructor stub
+    }
+
+    public enq(T e) {
+        return new Sequeue<>(getFst(), getSnd().enq(e));
+    }
+
+}