Greatest Number

# Write your solution here
def solve(a, b, c):
    if a >= b and a >= c:
        return a
    elif b >= a and b >= c:
         return b
    else:
        return c    
    
    
# You can test your function by calling it within the following block
if __name__ == "__main__":
    greatest = solve(0, 0, -9)
    print(greatest)