from functools import reduce
def add(x,y):
return x+y
print(reduce(add,[1,2,3,4]))
# your code goes here
# your code goes here
# your code goes here
ZnJvbSBmdW5jdG9vbHMgaW1wb3J0IHJlZHVjZQpkZWYgYWRkKHgseSk6CglyZXR1cm4geCt5CgkKcHJpbnQocmVkdWNlKGFkZCxbMSwyLDMsNF0pKQojIHlvdXIgY29kZSBnb2VzIGhlcmUKIyB5b3VyIGNvZGUgZ29lcyBoZXJlCiMgeW91ciBjb2RlIGdvZXMgaGVyZQ==