1
0
1
0
1
0
1
0
2
1
1
0
2
2
1
0
1
0
1
0
1
0
1
0
1
0
2
1
2
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
6
8
1
0
2
1
1
0
1
0
1
0
1
0
1
0
1
0
2
1
4
4
1
0
2
1
1
0
3
2
1
0
1
0