grot(a)
6 l
4
1000 
1000
400
100
+91
1000
1000
400
100
+66
1000
1000
400
100
+62
1000
1000
400
100
+233
1000
1000
400
100
+48
1000
1000
400
100
+43
1000
1000
400
100
+37
