print("This program shows the greatest of three number")
a=input("Enter 1st number: ")
b=input("Enter 2nd number: ")
c=input("Enter 3rd number: ")

if(a>c and a>b):
    d=a
elif(b>a and b>c):
    d=b
else:
    d=c
print("The greatest of three numbers is ",d)
input("Press enter to exit")