adding homework

homeworks/03_Alex_Gechovski/Recursion2zad.py

@@ -0,0 +1,16 @@
+
+ways = 0
+
+def num_ways(steps):
+
+    if steps == 0:
+        global ways
+        ways = ways +1
+        return 
+
+    num_ways(steps - 1)
+    if steps > 1:
+        num_ways(steps - 2)
+
+num_ways(9)
+print(ways)

homeworks/03_Alex_Gechovski/Recursion3zad.py

@@ -0,0 +1,19 @@
+def replace_1(list_1,find,replace):
+
+    if not isinstance(list_1,list) and not isinstance(list_1,tuple):
+      return
+
+    for i,value in enumerate(list_1): 
+        if value == find:
+
+            list_1[i] = replace
+        elif isinstance(list_1, list) or isinstance(list_1,tuple):
+
+            replace_1(value,find,replace)
+
+
+
+list_1 = [ 'a', 1, [ ['a', 'b'], 1], ([1, 3, 'a'], 'b')]
+replace_1(list_1, 'a', 'c')
+print(list_1) # => [ 'c', 1, [ ['c', 'b'], 1], ([1, 3, 'c'], 'b')]
+