IyBb8J+mkiBTdHJ1Y3R1cmUgbGluw6lhaXJlXSguLi8pCiMjIPCfk5ogUGlsZQojIyBb4pu9IEZpbGVdKC4uLzIwLWZpbGUvKQojIyBb4puT77iPIExpc3RlIGNoYWluw6llXSguLi8zMC1jaGFpbmUvKQ== Les piles Exercices pratiques de difficulté variable, mais progressive.