⠀⠀⠀⠀
2 l
4
1000 
1000
400
100
+74
1
38
8
12
1000
1000
400
100
+22
1000
1000
400
100
+107
1000
1000
400
100
+168
1000
1000
400
100
+118
1000
1000
400
100
+267
