algorithm.ipynb

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     "text": [
      " 9\n"
     ]
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    {
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     "text": [
      "2\n"
     ]
    }
   ],
   "source": [
    "from collections import deque\n",
    "\n",
    "\n",
    "\n",
    "def bfs(n):\n",
    "    \n",
    "    q = deque()\n",
    "    q.append((0, n)) # (depth, node)\n",
    "    \n",
    "    while True:\n",
    "        depth, n = q.popleft()\n",
    "        if n==1: return depth\n",
    "        \n",
    "        # neighbor\n",
    "        depth += 1\n",
    "        if n%3==0:\n",
    "            q.append((depth, n//3))\n",
    "        if n%2==0:\n",
    "            q.append((depth, n//2))\n",
    "        q.append((depth,n-1))\n",
    "\n",
    "\n",
    "# main\n",
    "n = int(input())\n",
    "cnt = bfs(n)\n",
    "print(cnt)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "metadata": {},
   "outputs": [
    {
     "name": "stdin",
     "output_type": "stream",
     "text": [
      " 3\n",
      " 4\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "7\n"
     ]
    },
    {
     "name": "stdin",
     "output_type": "stream",
     "text": [
      " 7\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "44\n"
     ]
    },
    {
     "name": "stdin",
     "output_type": "stream",
     "text": [
      " 10\n"
     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "274\n"
     ]
    }
   ],
   "source": [
    "def dfs(n, value):\n",
    "    global cnt\n",
    "    if value>n:\n",
    "        return\n",
    "    \n",
    "    for i in range(1,4):\n",
    "        if value+i == n:\n",
    "            cnt += 1\n",
    "            return\n",
    "        dfs(n, value+i)\n",
    "        \n",
    "# main\n",
    "T = int(input())\n",
    "for _ in range(T):\n",
    "    n = int(input())\n",
    "    cnt = 0\n",
    "    dfs(n, 0)\n",
    "    print(cnt)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "metadata": {},
   "outputs": [
    {
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      "text/plain": [
       "[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]"
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     "execution_count": 33,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "d = [0]*(n+1)\n",
    "d"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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