求平均成绩

n, m = map(int, input().split())

grades = []
for row in range(m):
    grades.append(list(map(float, input().split())))
# print(grades)

average_grades = []
for subject in range(n):
    subject_total_grades = 0
    for student in range(m):
        subject_total_grades += grades[student][subject]
    average_grades.append(subject_total_grades/m)

for i in average_grades:
    print('{:.1f}'.format(i))