Homework 2

homeworks/01_Avigeia_Ilieva/01_Avigeia_Ilieva_homework/task2.py

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+def num_ways(N):
+    if N < 2:
+        return 'too few steps' 
+    n1, n2 = 0, 1
+    i = 0;
+    while i < N :
+        ways = n1 + n2
+        n1 = n2
+        n2 = ways
+        i += 1
+    return ways
+
+#examples
+print (num_ways(3))
+print (num_ways(5))
+
+
+
+
+

homeworks/01_Avigeia_Ilieva/01_Avigeia_Ilieva_homework/task3.py

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+from typing import List
+
+
+def replace(list, find, replace):
+    for n, i in enumerate (list):
+        """"
+        if type(list[n]) is type(list):
+            replace(list[n], find, replace)
+
+        if type(list[n]) is tuple:
+            replace(list[n], find, replace)
+        """
+        if i == find:
+            list[n] = replace
+
+    return list
+
+list = [ 'a', 1, [ ['a', 'b'], 1], ([1, 3, 'a'], 'b')]
+
+res = replace (list, 'a', 'c')
+print(res)