1000 
1000
400
100
+57
1
2
1
1
1000
1000
400
100
+23
1000
1000
400
100
+161
1000
1000
400
100
+72
1000
1000
400
100
+67
1000
1000
400
100
+189
1000
1000
400
100
+116
1000
1000
400
100
+50
