# Swap without using any temp variable
x = 66
y = 77
print("Original: ", x,y)
x = x - y
y = x + y
x = y - x
print("Swapped 1st time: ", x,y)
x = x + y
y = x - y
x = x - y
print("Swapped 2nd time: ", x,y)
# Output:
# Original: 66 77
# Swapped 1st time: 77 66
# Swapped 2nd time: 66 77