{"id":28029,"date":"2024-10-27T15:21:04","date_gmt":"2024-10-27T15:21:04","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=28029"},"modified":"2024-11-26T07:11:29","modified_gmt":"2024-11-26T07:11:29","slug":"%ec%9e%90%eb%b0%94%ec%8a%a4%ed%81%ac%eb%a6%bd%ed%8a%b8-%ec%bd%94%eb%94%a9%ed%85%8c%ec%8a%a4%ed%8a%b8-%ea%b0%95%ec%a2%8c-%ea%b0%80%ec%9e%a5-%ed%81%b0-%ec%a0%95%ec%82%ac%ea%b0%81%ed%98%95-%ec%b0%be","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/28029\/","title":{"rendered":"\uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uac00\uc7a5 \ud070 \uc815\uc0ac\uac01\ud615 \ucc3e\uae30"},"content":{"rendered":"

<\/p>\n

\uc548\ub155\ud558\uc138\uc694! \uc774\ubc88 \uae00\uc5d0\uc11c\ub294 “\uac00\uc7a5 \ud070 \uc815\uc0ac\uac01\ud615 \ucc3e\uae30” \ubb38\uc81c\ub97c JavaScript\ub85c \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc744 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \ubb38\uc81c\ub294 \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d(Dynamic Programming) \uc811\uadfc \ubc29\uc2dd\uc744 \ud65c\uc6a9\ud558\uc5ec \ud6a8\uc728\uc801\uc73c\ub85c \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc2e4\uc81c \uae30\uc5c5\uc758 \ucf54\ub529 \ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ucd9c\uc81c\ub418\ub294 \uc720\ud615\uc774\ubbc0\ub85c, \uc774 \ubb38\uc81c\ub97c \ud1b5\ud574 \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uac1c\ub150\uc744 \ud655\uace0\ud788 \ud558\uace0, \uc2e4\uc804\uc5d0\uc11c\uc758 \ud65c\uc6a9 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n

\ubb38\uc81c \uc124\uba85<\/h2>\n

\uc8fc\uc5b4\uc9c4 2\ucc28\uc6d0 \ubc30\uc5f4 matrix<\/code>\uac00 \uc788\uc744 \ub54c, ‘1’\ub85c \uc774\ub8e8\uc5b4\uc9c4 \uac00\uc7a5 \ud070 \uc815\uc0ac\uac01\ud615\uc758 \ubcc0\uc758 \uae38\uc774\ub97c \uad6c\ud558\ub294 \ubb38\uc81c\uc785\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc544\ub798\uc640 \uac19\uc740 \uc785\ub825 \ud589\ub82c\uc774 \uc8fc\uc5b4\uc9c4\ub2e4\uba74:<\/p>\n

1 0 1 0 0\n1 0 1 1 1\n1 1 1 1 1\n1 0 0 1 0<\/code><\/pre>\n
\uc704 \ud589\ub82c\uc5d0\uc11c \uac00\uc7a5 \ud070 \uc815\uc0ac\uac01\ud615\uc758 \ubcc0\uc758 \uae38\uc774\ub294 2\uc785\ub2c8\ub2e4. \uc989, ‘1’\ub85c \uc774\ub8e8\uc5b4\uc9c4 \ucd5c\ub300 \ud06c\uae30\ub294 2×2\uc785\ub2c8\ub2e4.<\/p>\n
\ubb38\uc81c \ud574\uacb0 \uc811\uadfc<\/h2>\n
\uc774 \ubb38\uc81c\ub294 \uc5ec\ub7ec \uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c \uc811\uadfc\ud560 \uc218 \uc788\uc9c0\ub9cc, \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \uac00\uc7a5 \ud6a8\uc728\uc801\uc785\ub2c8\ub2e4. \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \uc0ac\uc6a9\ud558\uba74 \uc774\uc804\uc5d0 \uacc4\uc0b0\ud55c \uac12\uc744 \uc7ac\uc0ac\uc6a9\ud558\uc5ec \ubd88\ud544\uc694\ud55c \uacc4\uc0b0\uc744 \uc904\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud55c \ub2e8\uacc4\ubcc4 \uc811\uadfc \ubc29\ubc95\uc785\ub2c8\ub2e4.<\/p>\n
1\ub2e8\uacc4: \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d \ud14c\uc774\ube14 \uc124\uc815<\/h3>\n
\uba3c\uc800, \uae30\uc874 \ud589\ub82c\uacfc \ub3d9\uc77c\ud55c \ud06c\uae30\uc758 2\ucc28\uc6d0 \ubc30\uc5f4\uc778 dp<\/code>\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc774 \ubc30\uc5f4\uc740 \uac01 \uc704\uce58\uc5d0 ‘1’\ub85c \uc774\ub8e8\uc5b4\uc9c4 \uc815\uc0ac\uac01\ud615\uc758 \ucd5c\ub300 \ubcc0\uc758 \uae38\uc774\ub97c \uc800\uc7a5\ud560 \uac83\uc785\ub2c8\ub2e4.<\/p>\n
2\ub2e8\uacc4: \uacbd\uacc4 \uc870\uac74 \ucc98\ub9ac<\/h3>\n
\ud589\ub82c\uc758 \uccab \ubc88\uc9f8 \ud589\uacfc \uccab \ubc88\uc9f8 \uc5f4\uc740 \uacbd\uacc4 \uc870\uac74\uc73c\ub85c \uc124\uc815\ud569\ub2c8\ub2e4. \uc774 \uacbd\uc6b0, \ud574\ub2f9 \uc704\uce58\uac00 ‘1’\uc774\ub77c\uba74 \ucd5c\ub300 \uc815\uc0ac\uac01\ud615\uc758 \ubcc0 \uae38\uc774\ub294 1\uc785\ub2c8\ub2e4. \ub9cc\uc57d ‘0’\uc774\ub77c\uba74 \uc5b4\ub514\uc5d0\ub3c4 \uc815\uc0ac\uac01\ud615\uc774 \uc874\uc7ac\ud558\uc9c0 \uc54a\uc73c\ubbc0\ub85c 0\uc73c\ub85c \uc124\uc815\ud569\ub2c8\ub2e4.<\/p>\n
3\ub2e8\uacc4: DP \ubc30\uc5f4 \ucc44\uc6b0\uae30<\/h3>\n
\uc774\ud6c4, \ud589\ub82c\uc744 \uc21c\ud68c\ud558\uba74\uc11c \uac01 \uc704\uce58\uc758 \uac12\uc5d0 \ub530\ub77c DP \ubc30\uc5f4\uc744 \uc5c5\ub370\uc774\ud2b8\ud569\ub2c8\ub2e4. \ud604\uc7ac \uc704\uce58 matrix[i][j]<\/code>\uac00 ‘1’\uc774\ub77c\uba74, \ud574\ub2f9 \uc704\uce58\uc5d0\uc11c \uc815\uc0ac\uac01\ud615\uc758 \ubcc0\uc758 \uae38\uc774\ub97c \ub2e4\uc74c\uacfc \uac19\uc774 \uad6c\ud569\ub2c8\ub2e4:<\/p>\n
dp[i][j] = Math.min(dp[i-1][j], dp[i][j-1], dp[i-1][j-1]) + 1;<\/code><\/pre>\n
\uc5ec\uae30\uc11c Math.min()<\/code> \ud568\uc218\ub294 \uc704\ucabd, \uc67c\ucabd, \uadf8\ub9ac\uace0 \uc67c\ucabd \ub300\uac01\uc120\uc5d0\uc11c \ucd5c\uc18c\uac12\uc744 \uad6c\ud558\ub294 \ud568\uc218\uc785\ub2c8\ub2e4. \uc774 \ucd5c\uc18c\uac12\uc740 \uc815\uc0ac\uac01\ud615\uc744 \ub9cc\ub4e4\uae30 \uc704\ud574 \ud544\uc694\ud55c \ucd5c\uc18c\ud55c\uc758 \uae38\uc774\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n
4\ub2e8\uacc4: \uacb0\uacfc \ucc98\ub9ac<\/h3>\n
\ub9c8\uc9c0\ub9c9\uc73c\ub85c, DP \ubc30\uc5f4\uc5d0\uc11c \uac00\uc7a5 \ud070 \uac12\uc744 \ucc3e\uc73c\uba74 \uadf8 \uac12\uc774 \uc815\uc0ac\uac01\ud615\uc758 \ubcc0\uc758 \uae38\uc774\uac00 \ub429\ub2c8\ub2e4.<\/p>\n
\uc54c\uace0\ub9ac\uc998 \uad6c\ud604<\/h2>\n
\uc774\uc81c \uc55e\uc11c \uc124\uba85\ud55c \uc811\uadfc \ubc29\uc2dd\uc744 \ubc14\ud0d5\uc73c\ub85c \uc2e4\uc81c \uc54c\uace0\ub9ac\uc998\uc744 JavaScript\ub85c \uad6c\ud604\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
function maximalSquare(matrix) {\n    if (matrix.length === 0) return 0;\n\n    const rows = matrix.length;\n    const cols = matrix[0].length;\n    const dp = Array.from({ length: rows }, () => Array(cols).fill(0));\n    let maxSide = 0;\n\n    for (let i = 0; i < rows; i++) {\n        for (let j = 0; j < cols; j++) {\n            if (matrix[i][j] === '1') {\n                if (i === 0 || j === 0) {\n                    dp[i][j] = 1; \/\/ \uccab \ubc88\uc9f8 \uc5f4\uc774\ub098 \ud589\uc77c \uacbd\uc6b0\ub294 1\n                } else {\n                    dp[i][j] = Math.min(dp[i-1][j], dp[i][j-1], dp[i-1][j-1]) + 1;\n                }\n                maxSide = Math.max(maxSide, dp[i][j]);\n            }\n        }\n    }\n\n    return maxSide * maxSide; \/\/ \uc815\uc0ac\uac01\ud615\uc758 \ub113\uc774 \ubc18\ud658\n}<\/code><\/pre>\n
\uc131\ub2a5 \ubc0f \ubcf5\uc7a1\ub3c4 \ubd84\uc11d<\/h2>\n
\uc774 \uc54c\uace0\ub9ac\uc998\uc758 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(m*n)\uc774\uba70, \uacf5\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(m*n)\uc785\ub2c8\ub2e4. \uc5ec\uae30\uc11c m\uc740 \ud589\ub82c\uc758 \ud589 \uc218, n\uc740 \uc5f4 \uc218\uc785\ub2c8\ub2e4. DP \ubc30\uc5f4\uc744 \uc0ac\uc6a9\ud558\uae30 \ub54c\ubb38\uc5d0 \uacf5\uac04\uc774 \ucd94\uac00\ub85c \ud544\uc694\ud558\uc9c0\ub9cc, \uc774\ub97c \ucd5c\uc801\ud654\ud558\uc5ec O(n)\uc73c\ub85c \uc904\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\ucd5c\uc801\ud654: \uacf5\uac04 \ubcf5\uc7a1\ub3c4 \uac10\uc18c<\/h2>\n
\uacbd\uc6b0\uc5d0 \ub530\ub77c DP \ubc30\uc5f4\uc758 \uacf5\uac04 \ubcf5\uc7a1\ub3c4\ub97c O(n)\uc73c\ub85c \uc904\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc804 DP \ubc30\uc5f4\uc744 \uc800\uc7a5\ud558\uae30 \uc704\ud574 \ub450 \uac1c\uc758 \ubc30\uc5f4\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc73c\uba70, \ud604\uc7ac \uc0c1\ud0dc\ub97c \uc5c5\ub370\uc774\ud2b8\ud560 \ub54c\ub294 \uc774\uc804 \uc0c1\ud0dc\ub9cc \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n
function maximalSquare(matrix) {\n    if (matrix.length === 0) return 0;\n\n    const rows = matrix.length;\n    const cols = matrix[0].length;\n    let dp = Array(cols).fill(0);\n    let maxSide = 0, prev = 0;\n\n    for (let i = 0; i < rows; i++) {\n        for (let j = 0; j < cols; j++) {\n            let temp = dp[j]; \/\/ \uc774\uc804 \uac12\uc744 \uc800\uc7a5\n            if (matrix[i][j] === '1') {\n                if (i === 0 || j === 0) {\n                    dp[j] = 1;\n                } else {\n                    dp[j] = Math.min(dp[j], dp[j-1], prev) + 1;\n                }\n                maxSide = Math.max(maxSide, dp[j]);\n            } else {\n                dp[j] = 0; \/\/ '0'\uc77c \uacbd\uc6b0 0 \uc124\uc815\n            }\n            prev = temp; \/\/ \uc774\uc804 \uac12\uc744 \uc5c5\ub370\uc774\ud2b8\n        }\n    }\n\n    return maxSide * maxSide; \/\/ \uc815\uc0ac\uac01\ud615\uc758 \ub113\uc774 \ubc18\ud658\n}<\/code><\/pre>\n
\ub9c8\uce58\uba70<\/h2>\n
\uc624\ub298\uc740 \uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ub4f1\uc7a5\ud558\ub294 “\uac00\uc7a5 \ud070 \uc815\uc0ac\uac01\ud615 \ucc3e\uae30” \ubb38\uc81c\ub97c \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \ud1b5\ud574 \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \uc774 \ubb38\uc81c\ub294 \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uae30\ubcf8 \uac1c\ub150\uc744 \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc744 \uc8fc\uba70, \uc2e4\uc804\uc5d0\uc11c\uc758 \ucf54\ub4dc \uc791\uc131 \ub2a5\ub825\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\ub294 \ub370 \ud070 \ub3c4\uc6c0\uc774 \ub420 \uac83\uc785\ub2c8\ub2e4. \ub2e4\uc591\ud55c \ubb38\uc81c\ub97c \ud480\uc5b4\ubcf4\uba70 \uc54c\uace0\ub9ac\uc998\uacfc \ub370\uc774\ud130 \uad6c\uc870\uc5d0 \ub300\ud55c \uc774\ud574\ub3c4\ub97c \ub192\uc774\ub294 \uac83\ub3c4 \uc78a\uc9c0 \ub9c8\uc138\uc694!<\/p>\n
\uc55e\uc73c\ub85c \ub354 \ub9ce\uc740 \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c\ub97c \ub2e4\ub8f0 \uc608\uc815\uc774\ub2c8 \ub9ce\uc740 \uad00\uc2ec \ubd80\ud0c1\ub4dc\ub9bd\ub2c8\ub2e4. \uac10\uc0ac\ud569\ub2c8\ub2e4!<\/p>\n
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\uc548\ub155\ud558\uc138\uc694! \uc774\ubc88 \uae00\uc5d0\uc11c\ub294 “\uac00\uc7a5 \ud070 \uc815\uc0ac\uac01\ud615 \ucc3e\uae30” \ubb38\uc81c\ub97c JavaScript\ub85c \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc744 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774 \ubb38\uc81c\ub294 \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d(Dynamic Programming) \uc811\uadfc \ubc29\uc2dd\uc744 \ud65c\uc6a9\ud558\uc5ec \ud6a8\uc728\uc801\uc73c\ub85c \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc2e4\uc81c \uae30\uc5c5\uc758 \ucf54\ub529 \ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc790\uc8fc \ucd9c\uc81c\ub418\ub294 \uc720\ud615\uc774\ubbc0\ub85c, \uc774 \ubb38\uc81c\ub97c \ud1b5\ud574 \ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uac1c\ub150\uc744 \ud655\uace0\ud788 \ud558\uace0, \uc2e4\uc804\uc5d0\uc11c\uc758 \ud65c\uc6a9 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4. \ubb38\uc81c \uc124\uba85 \uc8fc\uc5b4\uc9c4 2\ucc28\uc6d0 \ubc30\uc5f4 matrix\uac00 \uc788\uc744 \ub54c, ‘1’\ub85c … \ub354 \ubcf4\uae30 “\uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uac00\uc7a5 \ud070 \uc815\uc0ac\uac01\ud615 \ucc3e\uae30”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[26],"tags":[],"class_list":["post-28029","post","type-post","status-publish","format-standard","hentry","category-26"],"yoast_head":"\n\uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uac00\uc7a5 \ud070 \uc815\uc0ac\uac01\ud615 \ucc3e\uae30 - 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