for a in range(11):
    for b in range(11):
        if a == 10 and b == 10:
            v = 0
            print("v =", v)
        elif a == 10 and b == 5:
            v = 10
            print("v =", v)
        elif a == 10 and b == 0:
            v = 0
            print("v =", v)