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