# Задача 1
n = int(input())
m = int(input())

arr = [[int(input()) for _ in range(m)] for _ in range(n)]
res = 0

for i in arr:
    for j in range(len(i)):
        if j % 2 != 0:
            res += i[j]

print(res)

# Задача 2
n = int(input())
arr = [[int(input()) for _ in range(n)] for _ in range(n)]

diag_1 = 0
diag_2 = 0

for i in range(n):
    diag_1 += arr[i][i]
    diag_2 += arr[i][n - i - 1]

print(diag_1 + diag_2)
print(abs(diag_1 - diag_2))

# Задача 3
n = int(input())
m = int(input())
from random import randint
arr = [[int(randint(1, 10)) for _ in range(m)] for _ in range(n)]

for i in arr:
    print(i)

print()

results = {}

for i in arr:  # Добавление элементов в словарь
    for j in range(len(i)):

        if j not in results:
            results[j] = i[j]
        else:
            results[j] += i[j]

arr_max = 0, 0
arr_min = 0, 999999
for key, val in results.items():  # Нахождение наибольшего и наименьшего элемента
    if val > arr_max[1]:
        arr_max = key, val
    if val < arr_min[1]:
        arr_min = key, val

max_values = [[i[j] for j in range(len(i)) if j == arr_max[0]][0] for i in arr]
min_values = [[i[j] for j in range(len(i)) if j == arr_min[0]][0] for i in arr]

for i in arr:
    for j in range(len(i)):
        if j == arr_min[0]:
            i[j] = max_values[0]
            del max_values[0]
        elif j == arr_max[0]:
            i[j] = min_values[0]
            del min_values[0]

for i in arr:
    print(i)