^ . .
| . .
--- | . /.
\ | / . /.
> scores compatibles = INITn | / . / . /
/ | / . / . /
--- | . / .
| . / . /
| . . /
--------------->
^
| /
| / _/
| / / /
score optimisé = OPT | / / /
| /
| / /
| /
--------------->