Even Grid

import sys
sys.setrecursionlimit(10 ** 6)
input = sys.stdin.readline
mod = (10 ** 9) + 7

n = int(input())
d = [[0] * n for _ in range(n)]
s = input().strip()
for i in range(n):
    d[0][i] = int(s[i])
for i in range(1, n):
    s = input().strip()
    d[i][0] = int(s[0])

for i in range(1, n):
    for j in range(1, n):
        if d[i][0] == d[0][j] == 1:
            d[i][j] = 1
for i in range(n):
    print(*d[i], sep='')

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED