1000 
1000
400
100
+1
1000
1000
400
100
+1
1
1000
1000
400
100
+4
1000
1000
400
100
+3
1000
1000
400
100
+5
1000
1000
400
100
+2
1
1000
1000
400
100
+5
1
1000
1000
400
100
+5