added chicks_n_rabs question (ancient chinese puzzle), and bonestructure for clean_bot.

Author: anuragkumarak95

bots/clean_bot.py

@@ -0,0 +1,26 @@
+from matplotlib import pyplot as plt
+import random
+
+# generate the canvas..
+def gen_grid(size):
+    canvas = [[True for i in range(size)] for i in range(size)]
+    return canvas
+
+# randomly put dirty tiles in the canvas..
+def get_dirty(canvas):
+    for i,row in enumerate(canvas):
+        for j,_ in enumerate(row):
+            canvas[i][j]=bool(random.getrandbits(1))
+# TODO - func to find nearest dirty tile from our robots current position..
+find_nn_dirty(canvas,point):
+    x,y = point
+
+# TODO - func to generate next move of our robot towards the  dirt, 
+# if on dirt: clean it.
+def move(curr,next_dirt):
+    pass
+
+if __name__=='__main__':
+    canvas = gen_grid(100)
+    get_dirty(canvas)
+    print(canvas)

chicks_n_rabs.py

@@ -0,0 +1,22 @@
+'''Author Anurag Kumar(mailto:anuragkumarak95@gmail.com)
+
+Module to solve a classic ancient Chinese puzzle:
+We count 35 heads and 94 legs among the chickens and rabbits in a farm. 
+How many rabbits and how many chickens do we have?
+
+
+'''
+def solve(numheads,numlegs):
+    ns='No solutions!'
+    for i in range(numheads+1):
+        j=numheads-i
+        if 2*i+4*j==numlegs:
+            return i,j
+    return ns,ns
+
+if __name__=="__main__":
+    numheads=35
+    numlegs=94
+
+    solutions=solve(numheads,numlegs)
+    print(solutions)