소스 코드 제출

a=[]
for i in range(0, 20):
    b=[0 for j in range(20)]
    a.append(b)
n=int(input())
for i in range(n):
    x, y=map(int, input().split())
    for j in range(x):
        if a[j][y]==1:
            a[j][y]=0
        else:
            a[j][y]=1
    for j in range(y)
        if a[x][j]==1:
            a[x][j]=0
        else:
            a[x][j]=1
for i in range(1, 20):
    for j in range(1, 20):
        print (a[i][j], end=' ')
        print()