\ucf54\ub529 \ud14c\uc2a4\ud2b8\ub97c \uc900\ube44\ud558\ub294 \uc5ec\ub7ec\ubd84\uc744 \uc704\ud574, \uc2a4\uc704\ud504\ud2b8 \uc5b8\uc5b4\ub85c \ud480 \uc218 \uc788\ub294 \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c\ub97c \uc18c\uac1c\ud569\ub2c8\ub2e4. \uc774\ubc88 \ubb38\uc81c\ub294 ‘\uc6d0\ud558\ub294 \uc815\uc218 \ucc3e\uae30’\ub85c, \uc8fc\uc5b4\uc9c4 \uc815\uc218 \ubc30\uc5f4 \ub0b4\uc5d0\uc11c \ud2b9\uc815 \uc815\uc218\ub97c \ucc3e\ub294 \uc54c\uace0\ub9ac\uc998\uc744 \uad6c\ud604\ud558\uac8c \ub429\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \ubb38\uc81c \uc124\uba85\ubd80\ud130 \uc54c\uace0\ub9ac\uc998 \uc194\ub8e8\uc158\uae4c\uc9c0\uc758 \uacfc\uc815\uc744 \uc790\uc138\ud788 \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<\/header>\n \uc8fc\uc5b4\uc9c4 \uc815\uc218 \ubc30\uc5f4 \uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574\uc11c\ub294 \ubc30\uc5f4 \ub0b4\uc5d0\uc11c \uc120\ud615 \ud0d0\uc0c9\uc740 \ubc30\uc5f4\uc758 \ucc98\uc74c\ubd80\ud130 \ub05d\uae4c\uc9c0 \ud558\ub098\uc529 \ud655\uc778\ud558\uba74\uc11c \ubc30\uc5f4\uc774 \uc815\ub82c\ub41c \uacbd\uc6b0 \uc774\ubd84 \ud0d0\uc0c9\uc774 \ud6e8\uc52c \ud6a8\uc728\uc801\uc785\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \ubc30\uc5f4\uc758 \uc911\uac04 \uc778\ub371\uc2a4\ub97c \uae30\ubc18\uc73c\ub85c \uac80\uc0c9 \ubc94\uc704\ub97c \uc808\ubc18\uc73c\ub85c \uc904\uc5ec\uac00\uba70 \uc6b0\ub9ac\ub294 \uc6b0\uc120 \uc120\ud615 \ud0d0\uc0c9\uc744 \uad6c\ud604\ud55c \ud6c4, \uc774\ubd84 \ud0d0\uc0c9\uc5d0 \ub300\ud574\uc11c\ub3c4 \uad6c\ud604\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n \uc6b0\ub9ac\uac00 \uc791\uc131\ud55c \ud568\uc218\ub97c \ud14c\uc2a4\ud2b8\ud558\uae30 \uc704\ud574 \uba87 \uac00\uc9c0 \ucf00\uc774\uc2a4\ub97c \uc2e4\ud589\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n \uc120\ud615 \ud0d0\uc0c9\uc740 \uac04\ub2e8\ud558\uc9c0\ub9cc, \ucd5c\uc545\uc758 \uacbd\uc6b0 \ubaa8\ub4e0 \uc694\uc18c\ub97c \ud0d0\uc0c9\ud574\uc57c \ud558\ubbc0\ub85c \ud3c9\uade0\uc801\uc73c\ub85c O(n)\uc758 \uc2dc\uac04\uc774 \uc18c\uc694\ub429\ub2c8\ub2e4. \ubc18\uba74, \uc774\ubd84 \ud0d0\uc0c9\uc740 \uc815\ub82c\ub41c \ubc30\uc5f4\uc5d0\uc11c \ub354 \ub098\uc740 \uc131\ub2a5\uc744 \ubc1c\ud718\ud558\uba70 O(log n)\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4. \uadf8\ub7ec\ubbc0\ub85c \ub300\uaddc\ubaa8 \ub370\uc774\ud130\uc14b\uc758 \uacbd\uc6b0 \uc774\ubd84 \ud0d0\uc0c9\uc744 \uad8c\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n \uc774\ubc88 \ubb38\uc81c\ub97c \ud1b5\ud574 \uc6b0\ub9ac\ub294 \uc2a4\uc704\ud504\ud2b8\uc5d0\uc11c \uc815\uc218\ub97c \ubc30\uc5f4\uc5d0\uc11c \ucc3e\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \ubc30\uc6e0\uc2b5\ub2c8\ub2e4. \uae30\ubcf8\uc801\uc778 \uc120\ud615 \ud0d0\uc0c9\uc744 \ud1b5\ud574 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc744 \uc774\ud574\ud558\uc600\uace0, \ub354 \ud6a8\uc728\uc801\uc778 \uc774\ubd84 \ud0d0\uc0c9\uc73c\ub85c \uc131\ub2a5\uc744 \uac1c\uc120\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\ub3c4 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \uc9c0\uc18d\uc801\uc778 \uc5f0\uc2b5\uc744 \ud1b5\ud574 \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c \ud480\uc774\uc5d0 \ub300\ud55c \uac10\uac01\uc744 \ud0a4\uc6b0\uc2dc\uae38 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n<\/section>\n<\/article>\n <\/body><\/p>\n","protected":false},"excerpt":{"rendered":"\ubb38\uc81c \uc124\uba85<\/h2>\n
numbers<\/code>\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ubc30\uc5f4\uc5d0\uc11c \ud2b9\uc815 \uc815\uc218 target<\/code>\uc774 \uc874\uc7ac\ud558\ub294\uc9c0 \ud655\uc778\ud558\ub294 \ud568\uc218\ub97c \uc791\uc131\ud558\uc138\uc694. \ub9cc\uc57d \uc874\uc7ac\ud55c\ub2e4\uba74 \ud574\ub2f9 \uc815\uc218\uc758 \uc778\ub371\uc2a4\ub97c \ubc18\ud658\ud558\uace0, \uc874\uc7ac\ud558\uc9c0 \uc54a\uc73c\uba74 -1<\/code>\uc744 \ubc18\ud658\ud558\uc138\uc694.<\/p>\nfunc findTarget(numbers: [Int], target: Int) -> Int<\/code><\/pre>\n<\/section>\n\uc785\ub825<\/h2>\n
\n
numbers<\/code>: \uc815\uc218\ub85c \uc774\ub8e8\uc5b4\uc9c4 \ubc30\uc5f4 (1 \u2264 numbers\uc758 \uae38\uc774 \u2264 106<\/sup>)<\/li>\ntarget<\/code>: \ucc3e\uace0\uc790 \ud558\ub294 \uc815\uc218 (-109<\/sup> \u2264 target \u2264 109<\/sup>)<\/li>\n<\/ul>\n<\/section>\n\ucd9c\ub825<\/h2>\n
target<\/code>\uc774 \uc874\uc7ac\ud558\ub294 \uacbd\uc6b0 \ud574\ub2f9\ud558\ub294 \uc778\ub371\uc2a4\ub97c \ubc18\ud658\ud558\uace0, \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 -1<\/code>\uc744 \ubc18\ud658\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n\uc608\uc81c<\/h2>\n
\uc608\uc81c 1<\/h3>\n
\uc785\ub825: numbers = [1, 2, 3, 4, 5], target = 3\n\ucd9c\ub825: 2<\/code><\/pre>\n\uc608\uc81c 2<\/h3>\n
\uc785\ub825: numbers = [5, 6, 7, 8, 9], target = 1\n\ucd9c\ub825: -1<\/code><\/pre>\n<\/section>\n\uc194\ub8e8\uc158 \uc811\uadfc \ubc29\ubc95<\/h2>\n
target<\/code>\uc774 \uc704\uce58\ud55c \uc778\ub371\uc2a4\ub97c \ucc3e\ub294 \ubc29\ubc95\uc744 \uc0dd\uac01\ud574\uc57c \ud569\ub2c8\ub2e4. \uae30\ubcf8\uc801\uc778 \ubc29\ubc95\uc73c\ub85c\ub294 \ubc18\ubcf5\ubb38\uc744 \ud1b5\ud55c \uc120\ud615 \ud0d0\uc0c9\uc774 \uc788\uc73c\uba70, \ubc30\uc5f4\uc774 \uc815\ub82c\ub41c \uacbd\uc6b0 \uc774\ubd84 \ud0d0\uc0c9\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n1. \uc120\ud615 \ud0d0\uc0c9<\/h3>\n
target<\/code>\uc744 \ucc3e\ub294 \ubc29\uc2dd\uc785\ub2c8\ub2e4. \ubc30\uc5f4\uc758 \uae38\uc774\uc5d0 \ub530\ub77c \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(n)\uc785\ub2c8\ub2e4.<\/p>\n2. \uc774\ubd84 \ud0d0\uc0c9<\/h3>\n
target<\/code>\uc744 \ucc3e\uc2b5\ub2c8\ub2e4. \uc774 \uacbd\uc6b0\uc758 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(log n)\uc785\ub2c8\ub2e4.<\/p>\n<\/section>\n\uad6c\ud604<\/h2>\n
\uc120\ud615 \ud0d0\uc0c9 \uad6c\ud604<\/h3>\n
func findTarget(numbers: [Int], target: Int) -> Int {\n for (index, number) in numbers.enumerated() {\n if number == target {\n return index\n }\n }\n return -1\n}<\/code><\/pre>\n\uc774\ubd84 \ud0d0\uc0c9 \uad6c\ud604<\/h3>\n
func binarySearch(numbers: [Int], target: Int) -> Int {\n var left = 0\n var right = numbers.count - 1\n\n while left <= right {\n let mid = (left + right) \/ 2\n if numbers[mid] == target {\n return mid\n } else if numbers[mid] < target {\n left = mid + 1\n } else {\n right = mid - 1\n }\n }\n return -1\n}<\/code><\/pre>\n<\/section>\n\ud14c\uc2a4\ud2b8 \ucf00\uc774\uc2a4<\/h2>\n
let numbers = [1, 2, 3, 4, 5]\nlet target1 = 3\nlet target2 = 6\n\nprint(findTarget(numbers: numbers, target: target1)) \/\/ 2\nprint(findTarget(numbers: numbers, target: target2)) \/\/ -1<\/code><\/pre>\n<\/section>\n\uc131\ub2a5 \ud3c9\uac00<\/h2>\n
\uacb0\ub860<\/h2>\n