"""

横の和は当然Mである必要がある
縦の和もM

"""

import sys
from sys import stdin

N,M = map(int,stdin.readline().split())

A = [ list(map(int,stdin.readline().split())) for i in range(N) ]


flag = True

for i in range(N):
    s = 0
    for j in range(N):
        s += A[i][j]
    if s != M:
        flag = False

for j in range(N):
    s = 0
    for i in range(N):
        s += A[i][j]
    if s != M:
        flag = False

if flag == False:

    print (12912091)

else:

    print (-1)