def func():
n = 1
while True:
for _ in range(n):
yield n;
n += 1
b = 200
f = func()
ls = [x for i, x in zip(range(b), f)]
print(ls[b-1])
print(sum(ls))
ZGVmIGZ1bmMoKToKCW4gPSAxCgl3aGlsZSBUcnVlOgoJCWZvciBfIGluIHJhbmdlKG4pOgoJCQl5aWVsZCBuOwoJCW4gKz0gMQoKCmIgPSAyMDAKZiA9IGZ1bmMoKQpscyA9IFt4IGZvciBpLCB4IGluIHppcChyYW5nZShiKSwgZildCnByaW50KGxzW2ItMV0pCnByaW50KHN1bShscykp