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   "source": [
    "You are given two integer arrays **nums1** and **nums2** sorted in ascending\n",
    "order and an integer **k**.\n",
    "\n",
    "Define a pair **(u,v)** which consists of one element from the first array and\n",
    "one element from the second array.\n",
    "\n",
    "Find the k pairs **(u 1,v1),(u2,v2) ...(uk,vk)** with the smallest sums.\n",
    "\n",
    "**Example 1:**\n",
    "\n",
    "\n",
    "\n",
    "    Input: nums1 = [1,7,11], nums2 = [2,4,6], k = 3\n",
    "    Output: [[1,2],[1,4],[1,6]]\n",
    "    Explanation: The first 3 pairs are returned from the sequence:\n",
    "                 [1,2],[1,4],[1,6],[7,2],[7,4],[11,2],[7,6],[11,4],[11,6]\n",
    "\n",
    "**Example 2:**\n",
    "\n",
    "\n",
    "\n",
    "    Input: nums1 = [1,1,2], nums2 = [1,2,3], k = 2\n",
    "    Output: [1,1],[1,1]\n",
    "    Explanation: The first 2 pairs are returned from the sequence:\n",
    "                 [1,1],[1,1],[1,2],[2,1],[1,2],[2,2],[1,3],[1,3],[2,3]\n",
    "\n",
    "**Example 3:**\n",
    "\n",
    "\n",
    "\n",
    "    Input: nums1 = [1,2], nums2 = [3], k = 3\n",
    "    Output: [1,3],[2,3]\n",
    "    Explanation: All possible pairs are returned from the sequence: [1,3],[2,3]"
   ],
   "metadata": {}
  },
  {
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": "k_smallest_pairs (generic function with 1 method)"
     },
     "metadata": {},
     "execution_count": 1
    }
   ],
   "cell_type": "code",
   "source": [
    "# @lc code=start\n",
    "using LeetCode\n",
    "using DataStructures\n",
    "function k_smallest_pairs(nums1::Vector{Int}, nums2::Vector{Int}, k::Int)\n",
    "    hp = Tuple{Int, Int}[]\n",
    "    odr = Base.Order.By(x -> -x[1] - x[2])\n",
    "    for n1 in nums1, n2 in nums2\n",
    "        heappush!(hp, (n1, n2), odr)\n",
    "        length(hp) > k && heappop!(hp, odr)\n",
    "    end\n",
    "    sort!(hp; by = x -> x[1] + x[2])\n",
    "end\n",
    "# @lc code=end"
   ],
   "metadata": {},
   "execution_count": 1
  },
  {
   "cell_type": "markdown",
   "source": [
    "---\n",
    "\n",
    "*This notebook was generated using [Literate.jl](https://github.com/fredrikekre/Literate.jl).*"
   ],
   "metadata": {}
  }
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