Added a python program example

Python/game of nim.py

@@ -0,0 +1,43 @@
+#game of nim
+
+"""
+Rules
+1.You take turns with the computer to take away 1/2 coins from a stack of coins
+2.Player to take last coin wins
+"""
+
+n=int(input("Enter number of coins in stack (>3):"))
+print("OK! Lets Play!")
+print("You get to go first ;)")
+while n>0:
+    taken=int(input("How many do you want to take (1/2)? :"))
+    if taken not in range(1,3):
+        print("Not cool...play by the rules")
+        continue
+    n=n-taken
+    if n>0: #this if is only to check whether there are coins left for the computer
+        if n%3==0:
+            print("Ok..then i ll take...1!")
+            n=n-1
+        elif n%3==1:
+            print("Ok..then i ll take...1!")
+            n=n-1
+        else:
+            print("Ok..then i ll take...2!")
+            n=n-2
+        print("Number of coins left:",n)
+
+if n==0:
+    print("Ha Ha! I win...better luck next time ;)")
+else:
+    print("hmm...you win..")
+
+
+"""
+try and observe that whether you can win or not actually depends on the initial
+number of coins you take :)
+
+to understand this better, think about what would happen if you could
+only take 1 each?
+"""
+