Add trees and hash table stuff

notes/fund-prog-3/chapter-5/programs/mult_str_hashing.py

@@ -0,0 +1,20 @@
+import sys
+
+initial = int(sys.argv[-4])
+multiplier = int(sys.argv[-3])
+size = int(sys.argv[-2])
+string = sys.argv[-1]
+
+
+def multiplicative_string_hash(string):
+    string_hash = initial
+    hash_multiplier = multiplier
+
+    for character in string:
+        string_hash *= hash_multiplier
+        string_hash += ord(character)
+
+    return string_hash % size
+
+
+print(multiplicative_string_hash(string))

notes/fund-prog-3/chapter-5/programs/num_hashing.py

@@ -0,0 +1,24 @@
+import sys
+
+size = int(sys.argv[-5])
+num = int(sys.argv[-4])
+var_1 = int(sys.argv[-3])
+var_2 = int(sys.argv[-2])
+i = int(sys.argv[-1])
+
+def quadratic():
+    h = num % size
+    return (h + (var_1 * i) + (var_2 * i * i)) % size
+
+def mod_size():
+    return num % size
+
+def h2():
+    return var_2 - (num % var_2)
+
+def combined():
+    return (mod_size() + (i * h2())) % size
+
+func = combined
+
+print(func())