changed the notation of scalability stuff

...ata/scalability_trees/tree_blocks_bracket/100/100_0/1.txt

...ata/scalability_trees/tree_blocks_bracket/100/100_2/1.txt

...ata/scalability_trees/tree_blocks_bracket/100/100_3/1.txt

...ata/scalability_trees/tree_blocks_bracket/100/100_4/1.txt

..._data/scalability_trees/tree_blocks_bracket/20/20_0/1.txt

..._data/scalability_trees/tree_blocks_bracket/20/20_2/1.txt

..._data/scalability_trees/tree_blocks_bracket/20/20_3/1.txt

..._data/scalability_trees/tree_blocks_bracket/20/20_4/1.txt

..._data/scalability_trees/tree_blocks_bracket/40/40_0/1.txt

..._data/scalability_trees/tree_blocks_bracket/40/40_2/1.txt

..._data/scalability_trees/tree_blocks_bracket/40/40_3/1.txt

..._data/scalability_trees/tree_blocks_bracket/40/40_4/1.txt

..._data/scalability_trees/tree_blocks_bracket/60/60_0/1.txt

..._data/scalability_trees/tree_blocks_bracket/60/60_2/1.txt

..._data/scalability_trees/tree_blocks_bracket/60/60_3/1.txt

..._data/scalability_trees/tree_blocks_bracket/60/60_4/1.txt

..._data/scalability_trees/tree_blocks_bracket/80/80_0/1.txt

..._data/scalability_trees/tree_blocks_bracket/80/80_2/1.txt

..._data/scalability_trees/tree_blocks_bracket/80/80_3/1.txt

..._data/scalability_trees/tree_blocks_bracket/80/80_4/1.txt