\ucf54\ub529\ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ub4f1\uc7a5\ud558\ub294 \uc54c\uace0\ub9ac\uc998 \uc911 \ud558\ub098\uc778 \ud22c \ud3ec\uc778\ud130(Two Pointer) \uae30\ubc95\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \ubcf8 \uac15\uc88c\uc5d0\uc11c\ub294 \ud22c \ud3ec\uc778\ud130\uc758 \uae30\ubcf8 \uac1c\ub150\uc744 \uc124\uba85\ud558\uace0, \uc774\ub97c \ud65c\uc6a9\ud55c \uc2e4\uc81c \ubb38\uc81c\ub97c \ud574\uacb0\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
\ud22c \ud3ec\uc778\ud130 \uae30\ubc95\uc740 \ubc30\uc5f4\uc774\ub098 \ub9ac\uc2a4\ud2b8\uc640 \uac19\uc740 \ub370\uc774\ud130 \uad6c\uc870\uc5d0\uc11c \ub450 \uac1c\uc758 \ud3ec\uc778\ud130\ub97c \uc774\uc6a9\ud558\uc5ec \ud6a8\uc728\uc801\uc73c\ub85c \ub370\uc774\ud130\ub97c \ucc98\ub9ac\ud558\ub294 \uc54c\uace0\ub9ac\uc998 \uae30\ubc95\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ubb38\uc81c\uc758 \ud06c\uae30\uac00 \ucee4\uc9c8\uc218\ub85d \ubd88\ud544\uc694\ud55c \ubc18\ubcf5\ubb38\uc744 \uc904\uc774\uace0, \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub97c \uac1c\uc120\ud558\ub294 \ub370 \ud6a8\uacfc\uc801\uc785\ub2c8\ub2e4.<\/p>\n
\ud22c \ud3ec\uc778\ud130\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \ub450 \uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4:<\/p>\n
\ub2e4\uc74c\uc740 \ud22c \ud3ec\uc778\ud130\ub97c \uc0ac\uc6a9\ud55c \uc2e4\uc81c \ubb38\uc81c\uc785\ub2c8\ub2e4.<\/p>\n
\uc815\ub82c\ub41c \ubc30\uc5f4 \uc704 \uc608\uc81c\uc5d0\uc11c \ud22c \ud3ec\uc778\ud130\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c \ub2e8\uacc4\ub85c \uc9c4\ud589\ud569\ub2c8\ub2e4:<\/p>\n \ubc30\uc5f4\uc758 \uc2dc\uc791\uacfc \ub05d\uc5d0 \ud3ec\uc778\ud130\ub97c \ucd08\uae30\ud654\ud569\ub2c8\ub2e4. \uc67c\ucabd \ud3ec\uc778\ud130\ub294 While \ub8e8\ud504\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub450 \ud3ec\uc778\ud130\uac00 \uad50\ucc28\ud560 \ub54c\uae4c\uc9c0 \ubc18\ubcf5\ud569\ub2c8\ub2e4. \uac01 \ubc18\ubcf5\ub9c8\ub2e4 \ud604\uc7ac \ud3ec\uc778\ud130\uac00 \uac00\ub9ac\ud0a4\ub294 \ub450 \uc218\uc758 \ud569\uc744 \uacc4\uc0b0\ud558\uace0, \uc774 \ud569\uc774 \uc774 \ucf54\ub4dc\uc758 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(N)\uc774\uba70, \uacf5\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(1)\uc785\ub2c8\ub2e4. \uc989, \ubc30\uc5f4\uc744 \ucd94\uac00\ub85c \uc800\uc7a5\ud558\uc9c0 \uc54a\uace0\ub3c4 \ubb38\uc81c\ub97c \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n \uc774\uc81c \ub2e4\ub978 \ubcc0\ud615 \ubb38\uc81c\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc8fc\uc5b4\uc9c4 \ubc30\uc5f4\uc5d0\uc11c \uc138 \uc218\uc758 \ud569\uc774 \uc815\uc218 \ubc30\uc5f4 \uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574, \ub450 \ubc88\uc9f8 \ud3ec\uc778\ud130\ub97c \ucd94\uac00\ud558\uc5ec \uc911\ubcf5\ub418\uc9c0 \uc54a\ub294 \uc870\ud569\uc744 \ucc3e\ub294 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc218\uc815\ub41c \uc54c\uace0\ub9ac\uc998\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n \ud22c \ud3ec\uc778\ud130\ub294 \ubc30\uc5f4\uc774\ub098 \ub9ac\uc2a4\ud2b8\ub97c \ucc98\ub9ac\ud558\ub294 \ub370 \uc788\uc5b4 \ub9e4\uc6b0 \uc720\uc6a9\ud55c \uae30\ubc95\uc785\ub2c8\ub2e4. \ud2b9\ud788 \uc815\ub82c\ub41c \ub370\uc774\ud130\ub97c \ub2e4\ub8f0 \ub54c \uc131\ub2a5\uc744 \ud68d\uae30\uc801\uc73c\ub85c \uac1c\uc120\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ubcf8 \uac15\uc88c\uc5d0\uc11c \ub2e4\ub8ec \ub0b4\uc6a9\uc744 \ud1b5\ud574 \ud22c \ud3ec\uc778\ud130\uc758 \uae30\ubcf8 \uac1c\ub150\uacfc \ud65c\uc6a9 \ubc29\ubc95\uc744 \uc774\ud574\ud558\uace0, \uc2e4\uc804 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub418\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n \ud0d0\uc0c9 \ubc0f \uc870\ud569 \ubb38\uc81c\uc5d0\uc11c \ud22c \ud3ec\uc778\ud130\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ub2e4\uc591\ud55c \uc0c1\ud669\uc744 \uacc4\uc18d \uc5f0\uc2b5\ud558\uc2dc\uace0, \uc2e4\uc81c \ucf54\ub529 \uc778\ud130\ubdf0\uc5d0\uc11c\ub3c4 \uc790\uc2e0 \uc788\uac8c \ud65c\uc6a9\ud558\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n \ub2e4\uc74c \ubb38\uc81c\ub97c \uc5f0\uc2b5\ud574 \ubcf4\uc138\uc694:<\/p>\n \uc774\uc640 \uac19\uc740 \ubb38\uc81c\ub97c \ud1b5\ud574 \ud22c \ud3ec\uc778\ud130\uc758 \uc774\ud574\ub3c4\ub97c \ub192\uc774\uace0, \ub2e4\uc591\ud55c \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \uacbd\ud5d8\uc744 \uc313\uc544\ubcf4\uc138\uc694.<\/p>\n <\/body><\/p>\n","protected":false},"excerpt":{"rendered":"numbers<\/code>\uc640 \ubaa9\ud45c \ud569 target<\/code>\uc774 \uc8fc\uc5b4\uc9c8 \ub54c, \ub450 \uc218\uc758 \ud569\uc774 \ubaa9\ud45c \ud569\uacfc \uc77c\uce58\ud558\ub294 \ub450 \uc218\uc758 \uc778\ub371\uc2a4\ub97c \ubc18\ud658\ud558\ub294 \ud568\uc218\ub97c \uc791\uc131\ud558\uc138\uc694. \uac01 \uc785\ub825\uc5d0\ub294 \uc815\ud655\ud788 \ud558\ub098\uc758 \ud574\ub2f5\uc774 \uc874\uc7ac\ud55c\ub2e4\uace0 \uac00\uc815\ud558\uba70, \uac19\uc740 \uc694\uc18c\ub97c \ub450 \ubc88 \uc0ac\uc6a9\ud560 \uc218\ub294 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n\uc785\ub825 \ud615\uc2dd<\/h3>\n
numbers: [2, 7, 11, 15]\ntarget: 9<\/code><\/pre>\n\ucd9c\ub825 \ud615\uc2dd<\/h3>\n
[0, 1]<\/code><\/pre>\n\uc608\uc81c \uc124\uba85<\/h3>\n
2 + 7 = 9<\/code>\uc774\ubbc0\ub85c \ucd9c\ub825\uc740 \uc778\ub371\uc2a4 0<\/code>\uacfc 1<\/code>\uc785\ub2c8\ub2e4.<\/p>\n4. \ubb38\uc81c \ud574\uacb0 \uacfc\uc815<\/h2>\n
Step 1: \ud3ec\uc778\ud130 \ucd08\uae30\ud654<\/h3>\n
left<\/code>, \uc624\ub978\ucabd \ud3ec\uc778\ud130\ub294 right<\/code>\ub85c \uba85\uba85\ud569\ub2c8\ub2e4.<\/p>\nStep 2: \uc870\uac74 \uac80\uc0ac<\/h3>\n
target<\/code>\uacfc \uc77c\uce58\ud558\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/p>\nStep 3: \ud569 \ube44\uad50<\/h3>\n
\n
target<\/code>\ubcf4\ub2e4 \uc791\uc73c\uba74 left<\/code> \ud3ec\uc778\ud130\ub97c \ud558\ub098 \uc624\ub978\ucabd\uc73c\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4.<\/li>\ntarget<\/code>\ubcf4\ub2e4 \ud06c\uba74 right<\/code> \ud3ec\uc778\ud130\ub97c \ud558\ub098 \uc67c\ucabd\uc73c\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4.<\/li>\ntarget<\/code>\uacfc \uac19\uc73c\uba74 \ub450 \uc778\ub371\uc2a4\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\nStep 4: \ucf54\ub4dc \uad6c\ud604<\/h3>\n
function twoSum(numbers, target) {\n let left = 0; \n let right = numbers.length - 1;\n\n while (left < right) {\n const sum = numbers[left] + numbers[right];\n\n if (sum === target) {\n return [left, right]; \n } else if (sum < target) {\n left++; \n } else {\n right--; \n }\n }\n return []; \/\/ \ud574\ub2f5\uc774 \uc5c6\ub294 \uacbd\uc6b0\n }<\/code><\/pre>\nStep 5: \ucf54\ub4dc \ubd84\uc11d<\/h3>\n
5. \ucd94\uac00 \uc608\uc81c \ubc0f \ubcc0\ud615 \ubb38\uc81c<\/h2>\n
target<\/code>\uacfc \uc77c\uce58\ud558\ub294 \ubaa8\ub4e0 \uc870\ud569\uc744 \ucc3e\ub294 \ubb38\uc81c\ub85c \uc751\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\ubb38\uc81c \uc124\uba85<\/h3>\n
numbers<\/code>\uc640 \uc815\uc218 target<\/code>\uc774 \uc8fc\uc5b4\uc9c8 \ub54c, \uc138 \uc218\uc758 \ud569\uc774 target<\/code>\uc774 \ub418\ub294 \ubaa8\ub4e0 \uc870\ud569\uc758 \uc778\ub371\uc2a4\ub97c \ubc18\ud658\ud558\uc138\uc694. \uacb0\uacfc\ub294 \uc911\ubcf5\ub418\uc9c0 \uc54a\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/p>\n\uc785\ub825 \ud615\uc2dd<\/h3>\n
numbers: [1, 2, 3, 4, 5]\ntarget: 9<\/code><\/pre>\n\ucd9c\ub825 \ud615\uc2dd<\/h3>\n
[[0, 3, 4], [1, 2, 4], [2, 3, 4]]<\/code><\/pre>\n\ud574\uacb0 \uc811\uadfc \ubc29\uc2dd<\/h3>\n
function threeSum(numbers, target) {\n let result = [];\n numbers.sort((a, b) => a - b); \/\/ \ubc30\uc5f4 \uc815\ub82c\n\n for (let i = 0; i < numbers.length - 2; i++) {\n let left = i + 1;\n let right = numbers.length - 1;\n\n while (left < right) {\n const sum = numbers[i] + numbers[left] + numbers[right];\n\n if (sum === target) {\n result.push([i, left, right]);\n left++;\n right--;\n while (left < right && numbers[left] === numbers[left - 1]) left++; \/\/ \uc911\ubcf5 \uc81c\uac70\n while (left < right && numbers[right] === numbers[right + 1]) right--; \/\/ \uc911\ubcf5 \uc81c\uac70\n } else if (sum < target) {\n left++;\n } else {\n right--;\n }\n }\n }\n return result;\n }<\/code><\/pre>\n6. \ub9c8\ubb34\ub9ac<\/h2>\n
\uc5f0\uc2b5 \ubb38\uc81c<\/h2>\n
\n
numbers<\/code>\uc640 \uc815\uc218 target<\/code>\uc774 \uc8fc\uc5b4\uc9c8 \ub54c, \uac00\uc7a5 \uac00\uae4c\uc6b4 \ub450 \uc218\uc758 \ud569\uc774 target<\/code>\uc774 \ub418\ub294 \uc778\ub371\uc2a4\uc758 \uc870\ud569\uc744 \ubc18\ud658\ud558\ub294 \ubb38\uc81c<\/li>\n