num_int = int(input())
string_nums = input()

# Converting string_nums to list:
string_list = string_nums.split()
int_string_list = list(map(int, string_list))

calc_mean = st.mean(int_string_list)
calc_median = st.median(int_string_list)
calc_mode = st.multimode(int_string_list)
min_calc_mode = min(calc_mode)
calc_std = st.pstdev(int_string_list)
calc_std_round = round(calc_std, 1)

# bounds:
length = len(int_string_list)
interval = 1.96 * (calc_std / length ** 0.5)
ub = calc_mean + interval
round_ub = round(ub, 1)
lb = calc_mean - interval
round_lb = round(lb, 1)

print(calc_mean)
print(calc_median)
print(min_calc_mode)
print(calc_std_round)
print(round_lb, round_ub)