# Enter your code here. Read input from STDIN. Print output to STDOUT

def median(x):
    x = sorted(x)
    length = len(x)
    if length % 2 == 0: 
        half_length = (length // 2)
        median = (x[half_length - 1] + x[half_length]) / 2
    else:   
        half_length = length // 2
        median = x[half_length]
    return median
    
def mean(x):
    length = len(x)
    return sum(x) / length
    
    
def mode(x):
    counter = {}
    for val in x:
        counter[val] = counter.get(val, 0) + 1
    
    max_frequency = max(counter.values())
    modes = [k for k, v in counter.items() if v == max_frequency]
    
    # If multiple elements have the same max frequency, return the smallest one
    return int(min(modes))
        
def std(x):
    x_mean = mean(x)
    x_std = (sum(((val - x_mean) ** 2 for val in x)) / len(x)) ** 0.5
    return x_std
        

def confidence_interval(x):
    x_mean = mean(x)
    x_std = std(x)
    length = len(x)
    interval = 1.96 * (x_std / (length ** 0.5))
    
    lower, upper = x_mean - interval, x_mean + interval
    
    return lower, upper, 1

if __name__ == '__main__':

    length = input()
    values = [float(val) for val in input().split(" ")]
    print(mean(values))
    print(median(values))
    print(mode(values))
    print(round(std(values), 1))
    print(round(confidence_interval(values)[0], 1), round(confidence_interval(values)[1], 1))