def res(R1, R2): 
       sum = R1 + R2 
       if option =="series": 
           return sum 
       elif option =="parallel" : 
           return (R1 * R2)/sum
       return 0
Resistance1 = int(input("Enter R1 : ")) 
Resistance2 = int(input("Enter R2 : ")) 
option = input("Enter series or parallel :") 
print("\n") 
R = res(Resistance1,Resistance2 ) 
if R==0:
    print('Wrong Input!!' )
else:
    print("The total resistance is", R)