IyBb8J+mkiBTdHJ1Y3R1cmUgbGluw6lhaXJlXSguLi8pCiMjIFvwn5OaIFBpbGVdKC4uLzEwLXBpbGUvKQojIyDim70gRmlsZQojIyBb4puT77iPIExpc3RlIGNoYWluw6llXSguLi8zMC1jaGFpbmUvKQ== Les files Exercices pratiques de difficulté variable, mais progressive. certains sont difficiles