#by using increment

n1=int(input('enter first number:')) 
n2=int(input('enter second number:')) 
for i in range(1,n2+1): 
    n1+=1
print(n1)

#by using AND (&) and XOR(A)

n1=int(input('enter first number:')) 
n2=int(input('enter second number:'))
while(n2!=0): 
    carry=n1&n2
    n1=n1^n2
    n2=carry<<1
print(n1)

#Subtraction without '-' operator

n1=int(input('enter first number:'))
n2=int(input('enter second number:')) 
while(n2!=0):
    n1=n1^n2
    carry=n1&n2 
    n2=carry<<1
print(n1)