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