{"id":29963,"date":"2024-10-28T03:18:54","date_gmt":"2024-10-28T03:18:54","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=29963"},"modified":"2024-11-26T06:50:40","modified_gmt":"2024-11-26T06:50:40","slug":"%eb%94%a5%eb%9f%ac%eb%8b%9d-%ed%8c%8c%ec%9d%b4%ed%86%a0%ec%b9%98-%ea%b0%95%ec%a2%8c-%eb%8b%a4%ec%9d%b4%eb%82%98%eb%af%b9-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%98%eb%b0%8d","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/29963\/","title":{"rendered":"\ub525\ub7ec\ub2dd \ud30c\uc774\ud1a0\uce58 \uac15\uc88c,  \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d"},"content":{"rendered":"<p><body><\/p>\n<p>\ucd5c\uadfc \uba87 \ub144\uac04 \uc778\uacf5\uc9c0\ub2a5 \ubc0f \uae30\uacc4\ud559\uc2b5\uc758 \ubc1c\uc804\uc740 \ub208\ubd80\uc2dc\uba70, \uadf8 \uc911 \ub525\ub7ec\ub2dd\uc740 \uac00\uc7a5 \uc720\ub9dd\ud55c \ubd84\uc57c \uc911 \ud558\ub098\ub85c \uc790\ub9ac \uc7a1\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ub525\ub7ec\ub2dd\uc740 \ub370\uc774\ud130\ub85c\ubd80\ud130 \uc720\uc758\ubbf8\ud55c \ud328\ud134\uc744 \ud559\uc2b5\ud558\ub294 \uac15\ub825\ud55c \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 \ud30c\uc774\ud1a0\uce58(PyTorch) \ud504\ub808\uc784\uc6cc\ud06c\ub97c \ud65c\uc6a9\ud558\uc5ec \ub525\ub7ec\ub2dd \ubaa8\ub378\uc744 \uad6c\ucd95\ud558\ub294 \ubc29\ubc95\uacfc \uc774\ub97c \ud1b5\ud55c \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d(dynamic programming) \uae30\ubc95\uc744 \ub2e4\ub8f0 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<h2>1. \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d\uc774\ub780?<\/h2>\n<p>\ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d(Dynamic Programming, DP)\uc740 \ubcf5\uc7a1\ud55c \ubb38\uc81c\ub97c \ubcf4\ub2e4 \uac04\ub2e8\ud558\uac8c \ub098\ub204\uc5b4 \ud574\uacb0\ud558\uae30 \uc704\ud55c \ubc29\ubc95\ub860\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ud070 \ubb38\uc81c\ub97c \uc5ec\ub7ec \uac1c\uc758 \uc791\uc740 \ubb38\uc81c\ub85c \ub098\ub204\uc5b4 \ud574\uacb0\ud55c \ud6c4, \uadf8 \uacb0\uacfc\ub97c \uacb0\ud569\ud558\uc5ec \ucd5c\uc885\uc801\uc778 \ud574\ub97c \uad6c\ud558\ub294 \ubc29\uc2dd\uc73c\ub85c, \uba54\ubaa8\ub9ac \uc81c\uc774\uc158(memoization) \ub610\ub294 \ud14c\uc774\ube14\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud558\uc704 \ubb38\uc81c\uc758 \uacb0\uacfc\ub97c \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n<h3>1.1 \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \ud2b9\uc131<\/h3>\n<ul>\n<li><strong>\uc911\ubcf5 \ud558\uc704 \ubb38\uc81c<\/strong>: \ub3d9\uc77c\ud55c \ud558\uc704 \ubb38\uc81c\uac00 \uc5ec\ub7ec \ubc88 \ud574\uacb0\ub418\ub294 \uacbd\uc6b0.<\/li>\n<li><strong>\ucd5c\uc801 \ubd80\ubd84 \uad6c\uc870<\/strong>: \ubb38\uc81c\uc758 \ucd5c\uc801 \ud574\uacb0\ucc45\uc774 \uadf8 \ud558\uc704 \ubb38\uc81c\uc758 \ucd5c\uc801 \ud574\uacb0\ucc45\uc73c\ub85c \uad6c\uc131\ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>2. \ud30c\uc774\ud1a0\uce58 \uc18c\uac1c<\/h2>\n<p>\ud30c\uc774\ud1a0\uce58\ub294 Facebook\uc5d0\uc11c \uac1c\ubc1c\ud55c \uc624\ud508\uc18c\uc2a4 \uae30\uacc4\ud559\uc2b5 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub85c, \uc8fc\ub85c \ub525\ub7ec\ub2dd \uc5f0\uad6c \ubc0f \ud504\ub85c\ud1a0\ud0c0\uc774\ud551\uc5d0 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ub6f0\uc5b4\ub09c \uc720\uc5f0\uc131\uacfc \uc131\ub2a5 \ub54c\ubb38\uc5d0 \ub110\ub9ac \uc0ac\uc6a9\ub418\uace0 \uc788\uc73c\uba70, \ud150\uc11c(Tensor) \uc5f0\uc0b0, \uc790\ub3d9 \ubbf8\ubd84, GPU \uac00\uc18d\uc744 \uc9c0\uc6d0\ud569\ub2c8\ub2e4.<\/p>\n<h2>3. \ud30c\uc774\ud1a0\uce58\ub97c \uc774\uc6a9\ud55c \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d \uc608\uc81c<\/h2>\n<p>\uc5ec\uae30\uc11c\ub294 \ud53c\ubcf4\ub098\uce58 \uc218\uc5f4(Fibonacci sequence)\uc744 \uacc4\uc0b0\ud558\uae30 \uc704\ud55c \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud30c\uc774\ud1a0\uce58\uc758 \uae30\ubcf8\uc801\uc778 \uc0ac\uc6a9\ubc95\uc744 \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>3.1 \ud53c\ubcf4\ub098\uce58 \uc218\uc5f4\uc758 \uc815\uc758<\/h3>\n<p>\ud53c\ubcf4\ub098\uce58 \uc218\uc5f4\uc740 F(n) = F(n-1) + F(n-2) (n &gt;= 2)\ub85c \uc815\uc758\ub418\uba70, \ucd08\uae30 \uc870\uac74\uc73c\ub85c F(0) = 0, F(1) = 1\uc744 \uac00\uc9d1\ub2c8\ub2e4. \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \uc0ac\uc6a9\ud558\uba74 \uc774 \uc218\uc5f4\uc744 \ud6a8\uc728\uc801\uc73c\ub85c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>3.2 \ud30c\uc774\ud1a0\uce58\ub85c \uad6c\ud604\ud558\uae30<\/h3>\n<pre><code class=\"language-python\">import torch\n\ndef fibonacci_dynamic(n):\n    # Initialize a tensor to store Fibonacci numbers\n    fib = torch.zeros(n + 1, dtype=torch.long)\n    fib[1] = 1\n\n    # Fill the tensor using dynamic programming\n    for i in range(2, n + 1):\n        fib[i] = fib[i - 1] + fib[i - 2]\n\n    return fib[n]\n\n# \uc608\uc81c \uc2e4\ud589\nn = 10\nresult = fibonacci_dynamic(n)\nprint(f\"Fibonacci number at position {n} is: {result.item()}\")\n<\/code><\/pre>\n<h3>3.3 \ucf54\ub4dc \uc124\uba85<\/h3>\n<p>\uc704 \ucf54\ub4dc\ub294 \ud30c\uc774\ud1a0\uce58\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud53c\ubcf4\ub098\uce58 \uc218\uc5f4\uc758 n\ubc88\uc9f8 \ud56d\uc744 \ud6a8\uc728\uc801\uc73c\ub85c \uacc4\uc0b0\ud558\ub294 \uacfc\uc815\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\ud150\uc11c \ucd08\uae30\ud654<\/strong>: <code>torch.zeros(n + 1, dtype=torch.long)<\/code> \uba85\ub839\uc744 \uc0ac\uc6a9\ud558\uc5ec 0\uc73c\ub85c \ucd08\uae30\ud654\ub41c \ud06c\uae30 n+1\uc758 \ud150\uc11c\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ub3d9\uc801 \ud504\ub85c\uadf8\ub798\ubc0d \uad6c\ud604<\/strong>: \ubc18\ubcf5\ubb38\uc744 \ud1b5\ud574 \uac01 \ud53c\ubcf4\ub098\uce58 \uc218\ub97c \uacc4\uc0b0\ud558\uace0 \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uacb0\uacfc \ubc18\ud658<\/strong>: \ucd5c\uc885\uc801\uc73c\ub85c n\ubc88\uc9f8 \ud53c\ubcf4\ub098\uce58 \uc218\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>4. \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d \uc751\uc6a9 \uc0ac\ub840<\/h2>\n<p>\ub2e4\uc591\ud55c \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c\uc640 \ucd5c\uc801\ud654 \ubb38\uc81c\uc5d0\uc11c \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \ub9e4\uc6b0 \uc720\uc6a9\ud558\uac8c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ub300\ud45c\uc801\uc778 \uc608\ub85c\ub294 \ucd5c\uc7a5 \uacf5\ud1b5 \ubd80\ubd84 \uc218\uc5f4 \ubb38\uc81c(LCS), \ubc30\ub0ad \ubb38\uc81c(Knapsack problem), \ub3d9\uc804 \uad50\ud658 \ubb38\uc81c \ub4f1\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>4.1 \ucd5c\uc7a5 \uacf5\ud1b5 \ubd80\ubd84 \uc218\uc5f4(LCS)<\/h3>\n<p>\ub450 \ubb38\uc790\uc5f4\uc758 \ucd5c\uc7a5 \uacf5\ud1b5 \ubd80\ubd84 \uc218\uc5f4\uc744 \ucc3e\ub294 \ubb38\uc81c\ub85c, \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc774 \ubb38\uc81c\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code class=\"language-python\">def lcs(X, Y):\n    m = len(X)\n    n = len(Y)\n    L = torch.zeros(m + 1, n + 1)\n\n    for i in range(1, m + 1):\n        for j in range(1, n + 1):\n            if X[i - 1] == Y[j - 1]:\n                L[i][j] = L[i - 1][j - 1] + 1\n            else:\n                L[i][j] = max(L[i - 1][j], L[i][j - 1])\n\n    return L[m][n]\n\n# \uc608\uc81c \uc2e4\ud589\nX = 'AGGTAB'\nY = 'GXTXAYB'\nresult = lcs(X, Y)\nprint(f\"Length of LCS is: {result.item()}\")\n<\/code><\/pre>\n<h3>4.2 \ucf54\ub4dc \uc124\uba85<\/h3>\n<p>\uc704 \ucf54\ub4dc\ub294 \ub450 \ubb38\uc790\uc5f4 X\uc640 Y\uc758 \ucd5c\uc7a5 \uacf5\ud1b5 \ubd80\ubd84 \uc218\uc5f4\uc758 \uae38\uc774\ub97c \uacc4\uc0b0\ud569\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\ud14c\uc774\ube14 \ucd08\uae30\ud654<\/strong>: \ub450 \ubb38\uc790\uc5f4\uc758 \uae38\uc774\uc5d0 \ub530\ub77c (m+1)x(n+1) \ud06c\uae30\uc758 2D \ud150\uc11c\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ube44\uad50 \ubc0f \uc5c5\ub370\uc774\ud2b8<\/strong>: \ub450 \ubb38\uc790\uc5f4\uc758 \uac01 \ubb38\uc790\ub97c \ube44\uad50\ud558\uc5ec LCS \uae38\uc774\ub97c \uc5c5\ub370\uc774\ud2b8\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uacb0\uacfc \ubc18\ud658<\/strong>: \ucd5c\uc885\uc801\uc73c\ub85c LCS\uc758 \uae38\uc774\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>5. \uacb0\ub860<\/h2>\n<p>\ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d\uc740 \ucf54\ub529 \uc778\ud130\ubdf0 \ubc0f \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c\uc5d0\uc11c \ub9e4\uc6b0 \uc911\uc694\ud55c \uae30\ubc95\uc785\ub2c8\ub2e4. \ud30c\uc774\ud1a0\uce58\uc640 \uacb0\ud569\ud558\uba74 \ub354\uc6b1 \uac15\ub825\ud55c \ub3c4\uad6c\ub85c \uc0ac\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uac15\uc88c\ub97c \ud1b5\ud574 \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uae30\ubcf8 \uc6d0\ub9ac\uc640 \ud30c\uc774\ud1a0\uce58\ub97c \ud65c\uc6a9\ud55c \uc608\uc81c\ub4e4\uc744 \ubc30\uc6e0\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uae30\ubc95\ub4e4\uc740 \ub2e4\uc591\ud55c \uc2e4\uc81c \ubb38\uc81c \ud574\uacb0\uc5d0 \uc720\uc6a9\ud558\uac8c \uc801\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>6. \ucc38\uace0 \uc790\ub8cc<\/h2>\n<ul>\n<li><a href=\"https:\/\/pytorch.org\/docs\/stable\/index.html\">PyTorch Documentation<\/a><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Dynamic_programming\">Dynamic Programming &#8211; Wikipedia<\/a><\/li>\n<\/ul>\n<p><\/body><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ucd5c\uadfc \uba87 \ub144\uac04 \uc778\uacf5\uc9c0\ub2a5 \ubc0f \uae30\uacc4\ud559\uc2b5\uc758 \ubc1c\uc804\uc740 \ub208\ubd80\uc2dc\uba70, \uadf8 \uc911 \ub525\ub7ec\ub2dd\uc740 \uac00\uc7a5 \uc720\ub9dd\ud55c \ubd84\uc57c \uc911 \ud558\ub098\ub85c \uc790\ub9ac \uc7a1\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ub525\ub7ec\ub2dd\uc740 \ub370\uc774\ud130\ub85c\ubd80\ud130 \uc720\uc758\ubbf8\ud55c \ud328\ud134\uc744 \ud559\uc2b5\ud558\ub294 \uac15\ub825\ud55c \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 \ud30c\uc774\ud1a0\uce58(PyTorch) \ud504\ub808\uc784\uc6cc\ud06c\ub97c \ud65c\uc6a9\ud558\uc5ec \ub525\ub7ec\ub2dd \ubaa8\ub378\uc744 \uad6c\ucd95\ud558\ub294 \ubc29\ubc95\uacfc \uc774\ub97c \ud1b5\ud55c \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d(dynamic programming) \uae30\ubc95\uc744 \ub2e4\ub8f0 \uac83\uc785\ub2c8\ub2e4. 1. \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d\uc774\ub780? \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d(Dynamic Programming, DP)\uc740 \ubcf5\uc7a1\ud55c \ubb38\uc81c\ub97c \ubcf4\ub2e4 \uac04\ub2e8\ud558\uac8c \ub098\ub204\uc5b4 &hellip; <a href=\"https:\/\/atmokpo.com\/w\/29963\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;\ub525\ub7ec\ub2dd \ud30c\uc774\ud1a0\uce58 \uac15\uc88c,  \ub2e4\uc774\ub098\ubbf9 \ud504\ub85c\uadf8\ub798\ubc0d&#8221;<\/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":[33],"tags":[],"class_list":["post-29963","post","type-post","status-publish","format-standard","hentry","category-33"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - 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