speed
4
1000 
1000
400
100
+31
1
1
1000
1000
400
100
+12
1
1000
1000
400
100
+178
1000
1000
400
100
+64
1000
1000
400
100
+23
1000
1000
400
100
+82
1000
1000
400
100
+61
1000
1000
400
100
+20