def main():

    freq = []
    for i in range(24):
        freq.append(0)

    numPeople = int(input("How many people were surveyed?\n"))

    for i in range(numPeople):
        hrs = int(input("How many hours did person "+(str(i+1))+" watch?\n"))
        freq[hrs] = freq[hrs] + 1

    print("Hours\tNumber of People")
    for i in range(24):
        print(i,'\t',freq[i])
    
main()