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    "<h1>B2 - Les entiers naturels en binaire<span class=\"tocSkip\"></span></h1>\n",
    "<div class=\"toc\"><ul class=\"toc-item\"><li><span><a href=\"#Décimal-vers-binaire\" data-toc-modified-id=\"Décimal-vers-binaire-1\"><span class=\"toc-item-num\">1&nbsp;&nbsp;</span>Décimal vers binaire</a></span></li><li><span><a href=\"#-Binaire-vers-Decimal\" data-toc-modified-id=\"-Binaire-vers-Decimal-2\"><span class=\"toc-item-num\">2&nbsp;&nbsp;</span> Binaire vers Decimal</a></span></li></ul></div>"
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    "<h2>Décimal vers binaire</h2>\n",
    "Ecrire une fonction `decbin` qui prend comme argument un entier `n` et qui renvoie une liste `l` qui correcpond à l'écriture de n en binaire.\n"
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    "Des méthodes utiles :\n",
    "<br> `a%b` renvoie le reste de la division de a par b\n",
    "<br> `a//b` renvoie le quotient de la division de a par b\n",
    "<br>\n",
    "    `l.append(a)`  ajoute à la liste l l'élément a\n",
    "<br>\n",
    "    `l.reverse()` inverse les élements d'une liste\n",
    "<br> essayer dans la cellule suivante"
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    "l=[-15,-20,2.2,100,9]\n",
    "#l.append(...)\n",
    "print(l)\n",
    "#l.reverse(...)\n",
    "print(l)"
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    "def decbin(n:int)->list:\n",
    "    "
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    "decbin(22611)"
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   "source": [
    "<h2> Binaire vers Decimal</h2>\n",
    "Ecrire une fonction `bindec` qui a pour argument une liste `l` correspond à un entier écrit en binaire et qui renvoie l'entier en décimal"
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    "def bindec("
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