upd

logic/4.py

@@ -0,0 +1,15 @@
+
+def f4(a, b):
+    return ((a <= b) and b) <= a
+
+
+def main():
+    print("a, b, f(a, b)")
+    for a in [0, 1]:
+        for b in [0, 1]:
+            print(a, b, int(f4(a, b)))
+
+
+        
+if __name__ == "__main__":
+    main()