1000 
1000
400
100
+97
2
1
2
1000
1000
400
100
+39
1000
1000
400
100
+74
1000
1000
400
100
+18
4
1000
1000
400
100
+42
1000
1000
400
100
+68
1000
1000
400
100
+74
