\uc774 \uae00\uc5d0\uc11c\ub294 \ucf54\ud2c0\ub9b0\uc744 \uc774\uc6a9\ud55c \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c \ud574\uacb0\uc744 \uc704\ud574 \ud22c \ud3ec\uc778\ud130 \uae30\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4. \ud22c \ud3ec\uc778\ud130\ub294 \ud55c \ubc30\uc5f4\uc774\ub098 \ub9ac\uc2a4\ud2b8\uc5d0\uc11c \ub450 \uac1c\uc758 \ud3ec\uc778\ud130\ub97c \uc774\uc6a9\ud558\uc5ec \ud2b9\uc815 \uc870\uac74\uc744 \ub9cc\uc871\ud558\ub294 \uac12\uc774\ub098 \ubc94\uc704\ub97c \ucc3e\ub294 \uc54c\uace0\ub9ac\uc998 \uae30\ubc95\uc73c\ub85c, \uc8fc\ub85c \uc815\ub82c\ub418\uc5b4 \uc788\ub294 \ubc30\uc5f4\uacfc \uad00\ub828\ub41c \ubb38\uc81c\uc5d0\uc11c \ub9ce\uc774 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n
\ub2e4\uc74c\uc740 \ud22c \ud3ec\uc778\ud130\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud574\uacb0\ud560 \uc218 \uc788\ub294 \ubb38\uc81c\uc785\ub2c8\ub2e4.<\/p>\n
\uc8fc\uc5b4\uc9c4 \uc815\uc218 \ubc30\uc5f4 \uc608\ub97c \ub4e4\uc5b4:<\/p>\n \uc774 \ubb38\uc81c\ub294 \ud22c \ud3ec\uc778\ud130 \uae30\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uba3c\uc800 \ubc30\uc5f4\uc744 \uc815\ub82c\ud574\uc57c \ud558\ubbc0\ub85c, \uc6d0\ub798\uc758 \uc778\ub371\uc2a4\ub97c \ucd94\uc801\ud558\ub294 \uac83\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \ud22c \ud3ec\uc778\ud130 \uc811\uadfc \ubc29\uc2dd\uc73c\ub85c \ubb38\uc81c\ub97c \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n \ubc30\uc5f4\uc744 \uc815\ub82c\ud558\uc5ec \uac01 \ud3ec\uc778\ud130\uac00 \uc801\uc808\ud55c \uc704\uce58\uc5d0\uc11c \ube44\uad50\ud560 \uc218 \uc788\ub3c4\ub85d \ud569\ub2c8\ub2e4. \uc774 \uacbd\uc6b0, \uac01 \uc694\uc18c\uc640 \uadf8 \uc778\ub371\uc2a4\ub97c \ud568\uaed8 \uc800\uc7a5\ud560 \ud544\uc694\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n \ud55c \ud3ec\uc778\ud130\ub294 \ubc30\uc5f4\uc758 \uc2dc\uc791\uc5d0\uc11c \uc2dc\uc791\ud558\uace0, \ub2e4\ub978 \ud3ec\uc778\ud130\ub294 \ubc30\uc5f4\uc758 \ub05d\uc5d0\uc11c \uc2dc\uc791\ud569\ub2c8\ub2e4. \ub450 \ud3ec\uc778\ud130\uac00 \uac00\ub9ac\ud0a4\ub294 \uac12\uc758 \ud569\uc774 \ud569\uc774 \uc544\ub798\ub294 \ucf54\ud2c0\ub9b0\uc73c\ub85c \uad6c\ud604\ud55c \ucf54\ub4dc\uc785\ub2c8\ub2e4:<\/p>\n \uc774 \uc54c\uace0\ub9ac\uc998\uc758 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 \ud22c \ud3ec\uc778\ud130 \uae30\uc220\uc740 \ub9e4\uc6b0 \uc720\uc6a9\ud55c \uc54c\uace0\ub9ac\uc998 \uae30\ubc95\uc73c\ub85c, \ub9ce\uc740 \ubb38\uc81c\ub4e4\uc744 \ud6a8\uc728\uc801\uc73c\ub85c \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ubb38\uc81c\ub97c \ud1b5\ud574 \ud22c \ud3ec\uc778\ud130\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubc30\uc5f4\uc744 \uad00\ub9ac\ud558\uace0 \uac12\uc744 \ucc3e\uc544\ub0b4\ub294 \ubc29\ubc95\uc744 \ubc30\uc6e0\uc2b5\ub2c8\ub2e4. \uc5f0\uc2b5\uc744 \ud1b5\ud574 \uc774 \uae30\ubc95\uc744 \uc775\ud788\uace0 \ub354 \ubcf5\uc7a1\ud55c \ubb38\uc81c\ub97c \ud574\uacb0\ud560 \uc218 \uc788\ub294 \ub2a5\ub825\uc744 \uae30\ub974\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n \ub2e4\uc74c\uc740 \ucd94\uac00\ub85c \uc5f0\uc2b5\ud560 \uc218 \uc788\ub294 \ud22c \ud3ec\uc778\ud130 \ubb38\uc81c\ub4e4\uc785\ub2c8\ub2e4:<\/p>\n \uc704 \ubb38\uc81c\ub4e4\uc744 \uc5f0\uc2b5\ud558\uba74\uc11c \ud22c \ud3ec\uc778\ud130 \uae30\ubc95\uc5d0 \ub300\ud55c \uc774\ud574\ub97c \ub354\uc6b1 \uae4a\uc774 \uc788\uac8c \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n <\/body><\/p>\n","protected":false},"excerpt":{"rendered":"nums<\/code>\uc640 \uc815\uc218 target<\/code>\uac00 \uc788\uc744 \ub54c, \ub450 \uc218\uc758 \ud569\uc774 target<\/code>\uc774 \ub418\ub294 \ub450 \uc218\uc758 \uc778\ub371\uc2a4\ub97c \ub9ac\ud134\ud558\uc2dc\uc624. \uac01 \uc785\ub825\uc5d0 \ub300\ud574 \uc815\ud655\ud788 \ud558\ub098\uc758 \uc815\ub2f5\uc774 \uc874\uc7ac\ud55c\ub2e4\uace0 \uac00\uc815\ud569\ub2c8\ub2e4. \uac19\uc740 \uc694\uc18c\ub97c \ub450 \ubc88 \uc0ac\uc6a9\ud560 \uc218\ub294 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n\n
nums = [2, 7, 11, 15], target = 9<\/code><\/li>\n[0, 1]<\/code> (nums[0] + nums[1] = 2 + 7 = 9)<\/li>\n<\/ul>\n\ubb38\uc81c \uc811\uadfc \ubc29\ubc95<\/h2>\n
1\ub2e8\uacc4: \uc785\ub825 \ubc30\uc5f4 \uc815\ub82c<\/h3>\n
2\ub2e8\uacc4: \ud22c \ud3ec\uc778\ud130 \uc124\uc815<\/h3>\n
target<\/code>\uacfc \uac19\uac70\ub098 \uc791\uc740 \uacbd\uc6b0 \ud3ec\uc778\ud130\ub97c \uc774\ub3d9\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n3\ub2e8\uacc4: \uc870\uac74 \ud655\uc778<\/h3>\n
target<\/code>\ubcf4\ub2e4 \ud06c\uba74 \uc624\ub978\ucabd \ud3ec\uc778\ud130\ub97c \uc67c\ucabd\uc73c\ub85c \uc774\ub3d9\uc2dc\ud0a4\uace0, \uc791\uc73c\uba74 \uc67c\ucabd \ud3ec\uc778\ud130\ub97c \uc624\ub978\ucabd\uc73c\ub85c \uc774\ub3d9\uc2dc\ud0b5\ub2c8\ub2e4. \ub450 \ud3ec\uc778\ud130\uac00 \ub9cc\ub0a0 \ub54c\uae4c\uc9c0 \uc774 \uacfc\uc815\uc744 \ubc18\ubcf5\ud569\ub2c8\ub2e4.<\/p>\n\ucf54\ud2c0\ub9b0 \ucf54\ub4dc<\/h2>\n
\n
\nfun twoSum(nums: IntArray, target: Int): IntArray {\n val indexedNums = nums.mapIndexed { index, num -> index to num }.sortedBy { it.second }\n var left = 0\n var right = indexedNums.size - 1\n\n while (left < right) {\n val sum = indexedNums[left].second + indexedNums[right].second\n when {\n sum == target -> return intArrayOf(indexedNums[left].first, indexedNums[right].first)\n sum < target -> left++\n else -> right--\n }\n }\n throw IllegalArgumentException(\"No two sum solution\")\n}\n<\/code>\n<\/pre>\n\uc2dc\uac04 \ubcf5\uc7a1\ub3c4<\/h2>\n
O(n log n)<\/code>\uc785\ub2c8\ub2e4. \ubc30\uc5f4\uc744 \uc815\ub82c\ud558\ub294 \ub370 \uc18c\uc694\ub418\ub294 \uc2dc\uac04\uc774 \uac00\uc7a5 \ud06c\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uadf8 \ud6c4 \ud22c \ud3ec\uc778\ud130 \ubc29\uc2dd\uc73c\ub85c \ubcc0\ud615\ub41c \ub450 \uc218\uc758 \ud569\uc744 \ucc3e\ub294\ub370 \uac78\ub9ac\ub294 \uc2dc\uac04\uc740 O(n)<\/code>\uc785\ub2c8\ub2e4.<\/p>\n\uacb0\ub860<\/h2>\n
\ucd94\uac00 \uc5f0\uc2b5 \ubb38\uc81c<\/h2>\n
\n
k<\/code>\uc778 \ub450 \uc218\uc758 \uc30d\uc758 \uac1c\uc218\ub97c \ucc3e\ub294 \ubb38\uc81c<\/li>\n