# your code goes here

class MyInt:
	def __init__(self, v):
		self._v = v
		
	def __iadd__(self, other):
		self._v += other._v
		return self
		
	def __repr__(self):
		return str(self._v)
		

def func(arg):
	arg += MyInt(10)
	print("Done!")
	
x = MyInt(100)
func(x)
print(x)