@staticmethod
def b():
    (n, *a) = map(int, sys.stdin.read().split())
    a = np.array(a)
    print(np.ceil((a[np.nonzero(a)[0]].sum() / np.count_nonzero(a))).astype(np.int8))
@staticmethod
def b():
    (n, *a) = map(int, sys.stdin.read().split())
    a = np.array(a)
    print(np.ceil((a[np.nonzero(a)[0]].sum() / np.count_nonzero(a))).astype(np.int8))