{"id":28180,"date":"2024-10-27T15:32:25","date_gmt":"2024-10-27T15:32:25","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=28180"},"modified":"2024-11-26T07:07:04","modified_gmt":"2024-11-26T07:07:04","slug":"%ec%8a%a4%ec%9c%84%ed%94%84%ed%8a%b8-%ec%bd%94%eb%94%a9%ed%85%8c%ec%8a%a4%ed%8a%b8-%ea%b0%95%ec%a2%8c-%eb%b3%91%ed%95%a9-%ec%a0%95%eb%a0%ac","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/28180\/","title":{"rendered":"\uc2a4\uc704\ud504\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \ubcd1\ud569 \uc815\ub82c"},"content":{"rendered":"

<\/p>\n

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\uc548\ub155\ud558\uc138\uc694. \uc624\ub298\uc740 \uc2a4\uc704\ud504\ud2b8\ub85c \uad6c\ud604\ud558\ub294 \ubcd1\ud569 \uc815\ub82c(Merge Sort) \uc54c\uace0\ub9ac\uc998\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 \ubcd1\ud569 \uc815\ub82c\uc758 \uae30\ucd08\ubd80\ud130 \uc2dc\uc791\ud558\uc5ec, \uc2e4\uc81c \ucf54\ub529 \ud14c\uc2a4\ud2b8\uc5d0\uc11c\uc758 \ud65c\uc6a9 \ubc29\ubc95\uae4c\uc9c0 \uc790\uc138\ud788 \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<\/header>\n

\n

\ubcd1\ud569 \uc815\ub82c\uc774\ub780?<\/h2>\n

\ubcd1\ud569 \uc815\ub82c\uc740 \ubd84\ud560 \uc815\ubcf5(divide and conquer) \uc804\ub7b5\uc5d0 \uae30\ubc18\ud55c \uc815\ub82c \uc54c\uace0\ub9ac\uc998\uc785\ub2c8\ub2e4. \uc774 \uc54c\uace0\ub9ac\uc998\uc740 \ubc30\uc5f4\uc744 \ubc18\uc73c\ub85c \ub098\ub204\uace0, \uac01 \uc11c\ube0c\ubc30\uc5f4\uc744 \uc815\ub82c\ud55c \ub2e4\uc74c, \ub450 \uac1c\uc758 \uc815\ub82c\ub41c \uc11c\ube0c\ubc30\uc5f4\uc744 \ud558\ub098\uc758 \uc815\ub82c\ub41c \ubc30\uc5f4\ub85c \ubcd1\ud569\ud569\ub2c8\ub2e4. \ubcd1\ud569 \uc815\ub82c\uc740 \ud3c9\uade0\uacfc \ucd5c\uc545\uc758 \uacbd\uc6b0 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\uac00 O(n log n)\uc774\uba70, \uc548\uc815 \uc815\ub82c(stable sort)\uc785\ub2c8\ub2e4.<\/p>\n<\/section>\n

\n

\ubcd1\ud569 \uc815\ub82c\uc758 \uc6d0\ub9ac<\/h2>\n

\ubcd1\ud569 \uc815\ub82c\uc758 \uacfc\uc815\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n

    \n
  1. \uc6d0\ubcf8 \ubc30\uc5f4\uc774 \uc8fc\uc5b4\uc9c0\uba74, \ud574\ub2f9 \ubc30\uc5f4\uc744 \uc911\uac04 \uc9c0\uc810\uc5d0\uc11c \ub450 \uac1c\uc758 \uc11c\ube0c\ubc30\uc5f4\ub85c \ubd84\ud560\ud569\ub2c8\ub2e4.<\/li>\n
  2. \uac01 \uc11c\ube0c\ubc30\uc5f4\uc5d0 \ub300\ud574 \uc7ac\uadc0\uc801\uc73c\ub85c \ubcd1\ud569 \uc815\ub82c\uc744 \uc218\ud589\ud569\ub2c8\ub2e4.<\/li>\n
  3. \uc815\ub82c\ub41c \ub450 \uc11c\ube0c\ubc30\uc5f4\uc744 \ubcd1\ud569\ud558\uc5ec \ud558\ub098\uc758 \uc815\ub82c\ub41c \ubc30\uc5f4\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n

    \uc774\uc5ec\uae30\uc11c \uc911\uc694\ud55c \uc810\uc740, \uac01 \ub2e8\uacc4\uc5d0\uc11c \uc11c\ube0c\ubc30\uc5f4\uc774 \uc815\ub82c\ub418\uc5b4 \uc788\ub2e4\ub294 \uc810\uc785\ub2c8\ub2e4. \uc774 \uc815\ub82c\ub41c \ubc30\uc5f4\uc744 \ub2e4\uc2dc \ud568\uaed8 \ud569\uce58\ub294 \ubc29\uc2dd\uc73c\ub85c \uc804\uccb4 \ubc30\uc5f4\uc744 \uc815\ub82c\ud558\uac8c \ub429\ub2c8\ub2e4.<\/p>\n<\/section>\n

    \n

    \ubb38\uc81c: \uc815\uc218\ub97c \uc815\ub82c\ud558\ub77c<\/h2>\n

    \uc8fc\uc5b4\uc9c4 \uc815\uc218 \ub9ac\uc2a4\ud2b8\ub97c \uc624\ub984\ucc28\uc21c\uc73c\ub85c \uc815\ub82c\ud558\ub294 \ud568\uc218\ub97c \uc2a4\uc704\ud504\ud2b8\ub85c \uc791\uc131\ud558\uc2dc\uc624. \uc785\ub825 \uc608\uc2dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n

    \n            let nums = [38, 27, 43, 3, 9, 82, 10]\n        <\/code><\/pre>\n
    \uc774 \ubb38\uc81c\ub97c \ud480\uae30 \uc704\ud574\uc11c\ub294 \uc704\uc5d0\uc11c \uc124\uba85\ud55c \ubcd1\ud569 \uc815\ub82c\uc758 \uc6d0\ub9ac\ub97c \uc801\uc6a9\ud558\uc5ec\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n
    \n
    \ubcd1\ud569 \uc815\ub82c \uad6c\ud604\ud558\uae30<\/h2>\n
    \uc774\uc81c \uc2a4\uc704\ud504\ud2b8 \ucf54\ub4dc\ub85c \ubcd1\ud569 \uc815\ub82c\uc744 \uad6c\ud604\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc544\ub798\ub294 \uc804\uccb4\uc801\uc778 \ucf54\ub4dc \uc785\ub2c8\ub2e4:<\/p>\n
    \n            func mergeSort(_ array: [Int]) -> [Int] {\n                \/\/ 1. \ubc30\uc5f4\uc758 \ud06c\uae30\uac00 1\ubcf4\ub2e4 \uc791\uc73c\uba74 \uc6d0\ubcf8 \ubc30\uc5f4 \ubc18\ud658\n                if array.count < 2 {\n                    return array\n                }\n                \n                \/\/ 2. \ubc30\uc5f4\uc744 \uc911\uac04 \uc9c0\uc810\uc5d0\uc11c \ubd84\ud560\n                let midIndex = array.count \/ 2\n                let leftArray = mergeSort(Array(array[0.. [Int] {\n                var mergedArray: [Int] = []\n                var leftIndex = 0\n                var rightIndex = 0\n                \n                \/\/ 4. \ub450 \ubc30\uc5f4\uc744 \ube44\uad50\ud558\uba70 \ubcd1\ud569\n                while leftIndex < left.count && rightIndex < right.count {\n                    if left[leftIndex] < right[rightIndex] {\n                        mergedArray.append(left[leftIndex])\n                        leftIndex += 1\n                    } else {\n                        mergedArray.append(right[rightIndex])\n                        rightIndex += 1\n                    }\n                }\n                \n                \/\/ 5. \ub0a8\uc740 \uc694\uc18c\ub4e4 \ucd94\uac00\n                while leftIndex < left.count {\n                    mergedArray.append(left[leftIndex])\n                    leftIndex += 1\n                }\n                \n                while rightIndex < right.count {\n                    mergedArray.append(right[rightIndex])\n                    rightIndex += 1\n                }\n                \n                return mergedArray\n            }\n\n            \/\/ Main\n            let nums = [38, 27, 43, 3, 9, 82, 10]\n            let sortedNums = mergeSort(nums)\n            print(sortedNums) \/\/ \uacb0\uacfc: [3, 9, 10, 27, 38, 43, 82]\n        <\/midindex]))><\/code><\/pre>\n
    \uc704 \ucf54\ub4dc\ub294 \uc785\ub825\ub41c \uc22b\uc790 \ub9ac\uc2a4\ud2b8\ub97c \ubcd1\ud569 \uc815\ub82c\uc744 \ud1b5\ud574 \uc815\ub82c\ud55c \ud6c4, \uacb0\uacfc\ub97c \ucd9c\ub825\ud569\ub2c8\ub2e4. \uac01 \ub2e8\uacc4\ubcc4\ub85c \uc8fc\uc11d\uc744 \ub2ec\uc544 \uc774\ud574\ub97c \ub3d5\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/section>\n
    \n
    \ucf54\ub4dc \uc124\uba85<\/h2>\n
    \ucf54\ub4dc\ub97c \ud55c \uc904\uc529 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4:<\/p>\n
      \n
    1. if array.count < 2 { return array }<\/code>: \ubc30\uc5f4\uc758 \ud06c\uae30\uac00 1\ubcf4\ub2e4 \uc791\ub2e4\uba74 \uc774\ubbf8 \uc815\ub82c\ub41c \uc0c1\ud0dc\uc774\ubbc0\ub85c \uadf8\ub300\ub85c \ubc18\ud658\ud569\ub2c8\ub2e4.<\/li>\n
    2. let midIndex = array.count \/ 2<\/code>: \ubc30\uc5f4\uc758 \uc911\uac04 \uc778\ub371\uc2a4\ub97c \uacc4\uc0b0\ud569\ub2c8\ub2e4.<\/li>\n
    3. let leftArray = mergeSort(Array(array[0..: \uc67c\ucabd \uc11c\ube0c\ubc30\uc5f4\uc744 \uc7ac\uadc0\uc801\uc73c\ub85c \uc815\ub82c\ud569\ub2c8\ub2e4.<\/midindex]))<><\/code><\/li>\n
    4. let rightArray = mergeSort(Array(array[midIndex..: \uc624\ub978\ucabd \uc11c\ube0c\ubc30\uc5f4\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc815\ub82c\ud569\ub2c8\ub2e4.<\/array.count]))<><\/code><\/li>\n
    5. return merge(leftArray, rightArray)<\/code>: \uc815\ub82c\ub41c \uc67c\ucabd\uacfc \uc624\ub978\ucabd \ubc30\uc5f4\uc744 \ubcd1\ud569\ud558\uc5ec \uacb0\uacfc\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n
      \ubcd1\ud569 \ud568\uc218\uc5d0\uc11c\ub294 \uc778\ub371\uc2a4\ub97c \ucd94\uc801\ud558\uba74\uc11c \ub450 \ubc30\uc5f4\uc744 \uac01\uac01 \ube44\uad50\ud574\uac00\uba70 \ubcd1\ud569\ud569\ub2c8\ub2e4. \ub9cc\uc57d \ud558\ub098\uc758 \ubc30\uc5f4\uc774 \ub05d\ub098\uba74 \ub098\uba38\uc9c0 \uc694\uc18c\ub4e4\uc744 \ucd94\uac00\ud558\uc5ec \ucd5c\uc885 \uacb0\uacfc\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n
      \n
      \ubcd1\ud569 \uc815\ub82c\uc758 \uc7a5\uc810\uacfc \ub2e8\uc810<\/h2>\n
      \ubcd1\ud569 \uc815\ub82c\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \uc7a5\uc810\uacfc \ub2e8\uc810\uc774 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n
      \uc7a5\uc810:<\/h3>\n
        \n
      1. \uc548\uc815\uc801\uc778 \uc815\ub82c: \ub3d9\uc77c\ud55c \uac12\uc744 \uac00\uc9c4 \uc694\uc18c\ub4e4\uc758 \uc0c1\ub300\uc801\uc778 \uc21c\uc11c\uac00 \ubcf4\uc874\ub429\ub2c8\ub2e4.<\/li>\n
      2. \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\uac00 O(n log n): \ub370\uc774\ud130 \uc591\uc5d0 \ube44\ub840\ud558\uc5ec \ube44\uad50\uc801 \ube60\ub978 \uc815\ub82c \uc131\ub2a5\uc744 \ubcf4\uc785\ub2c8\ub2e4.<\/li>\n
      3. \ud06c\uae30\uac00 \uace0\uc815\ub41c \ubc30\uc5f4\uc774 \uc544\ub2cc Linked List\uc5d0\ub3c4 \uc801\uc6a9 \uac00\ub2a5: \ud3ec\uc778\ud130\ub97c \uc774\uc6a9\ud55c \uad6c\uc870\uccb4\uc5d0\uc11c\ub3c4 \uc0ac\uc6a9 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n
        \ub2e8\uc810:<\/h3>\n
          \n
        1. \ucd94\uac00\uc801\uc778 \uba54\ubaa8\ub9ac\uac00 \ud544\uc694: \ubcd1\ud569 \uacfc\uc815\uc5d0\uc11c \uc0c8\ub85c\uc6b4 \ubc30\uc5f4\uc744 \uc0dd\uc131\ud558\uae30 \ub54c\ubb38\uc5d0 \uacf5\uac04 \ubcf5\uc7a1\ub3c4\uac00 O(n)\uc785\ub2c8\ub2e4.<\/li>\n
        2. \uac04\ub2e8\ud55c \uacbd\uc6b0(\uc608: \uac70\uc758 \uc815\ub82c\ub41c \uacbd\uc6b0)\uc5d0\uc11c\ub294 \uc0bd\uc785 \uc815\ub82c \uac19\uc740 \uac04\ub2e8\ud55c \uc54c\uace0\ub9ac\uc998\uc774 \uc624\ud788\ub824 \uc131\ub2a5\uc774 \uc88b\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ol>\n<\/section>\n
          \n
          \uc2e4\ub825 \ud5a5\uc0c1\uc744 \uc704\ud55c \ucd94\uac00 \ubb38\uc81c<\/h2>\n
          \ubcd1\ud569 \uc815\ub82c\uc744 \uc774\ud574\ud588\uc73c\ub2c8, \ucd94\uac00 \ubb38\uc81c\ub97c \ud1b5\ud574 \ub354 \uc5f0\uc2b5\ud574\ubcf4\uc138\uc694:<\/p>\n
            \n
          1. \uc815\uc218 \ubc30\uc5f4\uc774 \uc8fc\uc5b4\uc84c\uc744 \ub54c, \uc911\ubcf5\ub41c \uc22b\uc790\ub97c \uc81c\uac70\ud55c \uc815\ub82c\ub41c \ubc30\uc5f4\uc744 \ubc18\ud658\ud558\ub294 \ud568\uc218\ub97c \uc791\uc131\ud558\uc2dc\uc624.<\/li>\n
          2. \ubc30\uc5f4\uc774 \uc815\ub82c\ub418\uc5b4 \uc788\uc744 \ub54c, \ud2b9\uc815 \uac12\uc744 \uac16\ub294 \uc694\uc18c\uc758 \uc778\ub371\uc2a4\ub97c \uc774\uc9c4 \ud0d0\uc0c9(Binary Search)\uc744 \ud1b5\ud574 \ucc3e\ub294 \uc54c\uace0\ub9ac\uc998\uc744 \uad6c\ud604\ud558\uc2dc\uc624.<\/li>\n
          3. \uc785\ub825\uc73c\ub85c \ub4e4\uc5b4\uc628 \uc5ec\ub7ec \ubc30\uc5f4\uc744 \ubcd1\ud569\ud558\uc5ec \ud558\ub098\uc758 \uc815\ub82c\ub41c \ubc30\uc5f4\ub85c \ub9cc\ub4dc\ub294 \ud568\uc218\ub97c \uc2a4\uc704\ud504\ud2b8\ub85c \uc791\uc131\ud558\uc2dc\uc624.<\/li>\n<\/ol>\n<\/section>\n