3
cum
1
2
1
0
2
2
2
1
2
2
0
3
4
2
1
1
3
1
2
1
0
1
2
2
1
3
1
4
4
2
1
1
2
1
2
2
1
5
3
1
1
0
1
4
0
3
1
2
2
