Pk

J'ai un peu modifié inserer_element et placer, j'ai l'impression qu'il faut qqch pour eviter de refaire des "placer" dans tous les appels recursifs des qu'un scinder s'est produit, mais continuer à en faire tant qu'on scinde (je sais pas si c'est clair)

slides/figs/barbres_ordre2_supp10.svg

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