{"id":27505,"date":"2024-10-27T14:12:12","date_gmt":"2024-10-27T14:12:12","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=27505"},"modified":"2024-11-26T07:17:43","modified_gmt":"2024-11-26T07:17:43","slug":"c-%ec%bd%94%eb%94%a9%ed%85%8c%ec%8a%a4%ed%8a%b8-%ea%b0%95%ec%a2%8c-%ec%9d%b4%ed%95%ad%ea%b3%84%ec%88%98-%ea%b5%ac%ed%95%98%ea%b8%b0-2","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/27505\/","title":{"rendered":"C# \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc774\ud56d\uacc4\uc218 \uad6c\ud558\uae30 2"},"content":{"rendered":"<div class=\"post\">\n<p>\uc548\ub155\ud558\uc138\uc694, \uc5ec\ub7ec\ubd84! \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uc774\ud56d\uacc4\uc218\uc5d0 \ub300\ud574 \ub354\uc6b1 \uae4a\uc774 \uc788\ub294 \ub0b4\uc6a9\uc744 \ub2e4\ub904\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774\ud56d\uacc4\uc218\ub294 \uc870\ud569\ub860\uc5d0\uc11c \uc911\uc694\ud558\uac8c \ub2e4\ub904\uc9c0\ub294 \uac1c\ub150\uc73c\ub85c, \uc8fc\uc5b4\uc9c4 n\uac1c\uc758 \uac1d\uccb4 \uc911\uc5d0\uc11c k\uac1c\ub97c \uc120\ud0dd\ud558\ub294 \uacbd\uc6b0\uc758 \uc218\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ud2b9\ud788, C#\uc744 \ud65c\uc6a9\ud55c \ucf54\ub529 \uba74\uc811 \uc900\ube44\uc5d0 \uc720\uc6a9\ud55c \uc8fc\uc81c\uc785\ub2c8\ub2e4.<\/p>\n<h2>\ubb38\uc81c \uc124\uba85<\/h2>\n<p>\uc8fc\uc5b4\uc9c4 \uc790\uc5f0\uc218 n\uacfc k\uc5d0 \ub300\ud558\uc5ec, \uc774\ud56d\uacc4\uc218 C(n, k)\ub97c \uad6c\ud558\uc2dc\uc624. \uc774\ud56d\uacc4\uc218\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ub429\ub2c8\ub2e4:<\/p>\n<blockquote><p>\n        C(n, k) = n! \/ (k! * (n-k)!)\n    <\/p><\/blockquote>\n<p>\uc5ec\uae30\uc11c n!\uc740 n\uc758 \uacc4\uc2b9(factorial)\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc989, n! = n \u00d7 (n &#8211; 1) \u00d7 (n &#8211; 2) \u00d7 &#8230; \u00d7 1\uc785\ub2c8\ub2e4. \uc774\ud56d\uacc4\uc218\ub97c \uacc4\uc0b0\ud560 \ub54c\ub294 n, k\uc758 \ubc94\uc704\uac00 \uac01\uac01 0 \uc774\uc0c1 30 \uc774\ud558\ub85c \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4.<\/p>\n<h2>\uc785\ub825 \ubc0f \ucd9c\ub825 \ud615\uc2dd<\/h2>\n<p><strong>\uc785\ub825:<\/strong> \uccab \uc904\uc5d0 \ub450 \uac1c\uc758 \uc815\uc218 n, k\uac00 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4.<\/p>\n<p><strong>\ucd9c\ub825:<\/strong> C(n, k)\uc758 \uac12\uc744 \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/p>\n<h2>\uc608\uc81c<\/h2>\n<pre><code>\uc785\ub825:\n5 2\n\n\ucd9c\ub825:\n10<\/code><\/pre>\n<h2>\uc54c\uace0\ub9ac\uc998 \uc811\uadfc \ubc29\uc2dd<\/h2>\n<p>\uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc774\ud56d\uacc4\uc218\ub97c \uacc4\uc0b0\ud558\ub294 \uc5ec\ub7ec \uac00\uc9c0 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uac00\uc7a5 \uae30\ubcf8\uc801\uc778 \ubc29\ubc95\uc740 \uc7ac\uadc0 \ud638\ucd9c\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc5ec\uae30\uc11c\ub294 \uc7ac\uadc0\uac00 \uc131\ub2a5\uc0c1 \ube44\ud6a8\uc728\uc801\uc77c \uc218 \uc788\uc73c\ubbc0\ub85c, \ub3d9\uc801 \uacc4\ud68d\ubc95(DP)\uc744 \uc0ac\uc6a9\ud558\uc5ec \uba54\ubaa8\uc774\uc81c\uc774\uc158\uc744 \ud65c\uc6a9\ud558\ub294 \ubc29\ubc95\uc744 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>1. \ub3d9\uc801 \uacc4\ud68d\ubc95 (Dynamic Programming)<\/h3>\n<p>\uc774\ud56d\uacc4\uc218\ub97c \uacc4\uc0b0\ud558\ub294 DP \ud14c\uc774\ube14\uc744 \uad6c\uc131\ud558\uc5ec, \uc774\uc804\uc5d0 \uacc4\uc0b0\ud55c \uac12\uc744 \ud65c\uc6a9\ud568\uc73c\ub85c\uc368 \uc911\ubcf5 \uacc4\uc0b0\uc744 \ud53c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uad6c\uccb4\uc801\uc73c\ub85c \uc124\uba85\ud558\uc790\uba74, \ub2e4\uc74c\uc758 \uc810\ud654\uc2dd\uc744 \uc0ac\uc6a9\ud558\uc5ec DP \ud14c\uc774\ube14\uc744 \uad6c\ucd95\ud569\ub2c8\ub2e4:<\/p>\n<blockquote><p>\n        C(n, k) = C(n-1, k-1) + C(n-1, k)\n    <\/p><\/blockquote>\n<p>\uc5ec\uae30\uc5d0 \uae30\ubcf8 \uc0ac\ub840\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li>C(n, 0) = 1 (\uc5b4\ub5a4 n\uc5d0 \ub300\ud574 0\uac1c\ub97c \uc120\ud0dd\ud558\ub294 \uacbd\uc6b0\ub294 \ub2e8 \ud558\ub098\uc758 \uacbd\uc6b0)<\/li>\n<li>C(n, n) = 1 (n\uac1c\ub97c \uc804\ubd80 \uc120\ud0dd\ud558\ub294 \uacbd\uc6b0\ub3c4 \ub2e8 \ud558\ub098\uc758 \uacbd\uc6b0)<\/li>\n<\/ul>\n<h3>2. C# \ucf54\ub529<\/h3>\n<p>\uc774\uc81c C#\uc73c\ub85c \ub3d9\uc801 \uacc4\ud68d\ubc95\uc744 \uc774\uc6a9\ud558\uc5ec \uc774\ud56d\uacc4\uc218\ub97c \uad6c\ud558\ub294 \ucf54\ub4dc\ub97c \uc791\uc131\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>using System;\n\nclass Program\n{\n    static void Main(string[] args)\n    {\n        string[] inputs = Console.ReadLine().Split(' ');\n        int n = int.Parse(inputs[0]);\n        int k = int.Parse(inputs[1]);\n        \n        long result = BinomialCoefficient(n, k);\n        Console.WriteLine(result);\n    }\n\n    static long BinomialCoefficient(int n, int k)\n    {\n        long[,] dp = new long[n + 1, k + 1];\n\n        for (int i = 0; i &lt;= n; i++)\n        {\n            for (int j = 0; j &lt;= Math.Min(i, k); j++)\n            {\n                if (j == 0 || j == i)\n                {\n                    dp[i, j] = 1;\n                }\n                else\n                {\n                    dp[i, j] = dp[i - 1, j - 1] + dp[i - 1, j];\n                }\n            }\n        }\n        return dp[n, k];\n    }\n}<\/code><\/pre>\n<h2>\ucf54\ub4dc \uc124\uba85<\/h2>\n<p>\uc704\uc758 C# \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \uacfc\uc815\uc744 \ub530\ub985\ub2c8\ub2e4:<\/p>\n<ol>\n<li>\uc0ac\uc6a9\uc790\ub85c\ubd80\ud130 n\uacfc k\uc758 \uac12\uc744 \uc785\ub825\ubc1b\uc2b5\ub2c8\ub2e4.<\/li>\n<li>BinomialCoefficient \ud568\uc218\ub97c \ud638\ucd9c\ud558\uc5ec \uc774\ud56d\uacc4\uc218\ub97c \uacc4\uc0b0\ud569\ub2c8\ub2e4.<\/li>\n<li>\uc774 \ud568\uc218 \ub0b4\ubd80\uc5d0\uc11c 2\ucc28\uc6d0 \ubc30\uc5f4 dp\ub97c \uc815\uc758\ud558\uc5ec C(n, k)\uc758 \uac12\uc744 \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/li>\n<li>\ubaa8\ub4e0 \uacbd\uc6b0\uc758 \uc218\ub97c \ucc28\ub840\ub300\ub85c \uacc4\uc0b0\ud558\uace0, \ucd5c\uc885\uc801\uc73c\ub85c dp[n, k]\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n<h2>\uc2dc\uac04 \ubcf5\uc7a1\ub3c4<\/h2>\n<p>\uc774 \uc54c\uace0\ub9ac\uc998\uc758 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(n * k)\uc785\ub2c8\ub2e4. \uc774\ub294 DP \ud14c\uc774\ube14\uc744 \ucc44\uc6b0\uae30 \uc704\ud574 \ubaa8\ub4e0 n\uacfc k\uc5d0 \ub300\ud574 \ubc18\ubcf5\ud574\uc57c \ud558\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uacf5\uac04 \ubcf5\uc7a1\ub3c4 \ub610\ud55c O(n * k)\ub85c, DP \ubc30\uc5f4\uc744 \uc800\uc7a5\ud558\ub294 \uacf5\uac04\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n<h2>\uacb0\ub860<\/h2>\n<p>\uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 C#\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc774\ud56d\uacc4\uc218\ub97c \uacc4\uc0b0\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \ub3d9\uc801 \uacc4\ud68d\ubc95\uc744 \ud65c\uc6a9\ud558\uc5ec \ud6a8\uc728\uc801\uc73c\ub85c \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6b0\ub294 \uac83\ub3c4 \uc911\uc694\ud55c \ub0b4\uc6a9\uc785\ub2c8\ub2e4. \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c\ub97c \ud480 \ub54c \uc774\uc640 \uac19\uc740 \ub2e4\uc591\ud55c \ubc29\ubc95\uacfc \uc0ac\uace0\ub97c \uc775\ud788\ub294 \uac83\uc774 \uc911\uc694\ud558\ub2c8, \uc5ec\ub7ec \ubb38\uc81c\ub97c \ud480\uc5b4\ubcf4\uba70 \uc2e4\ub825\uc744 \uc313\uc544\uac00\uc2dc\uae38 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n<p>\uac10\uc0ac\ud569\ub2c8\ub2e4!<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\uc548\ub155\ud558\uc138\uc694, \uc5ec\ub7ec\ubd84! \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uc774\ud56d\uacc4\uc218\uc5d0 \ub300\ud574 \ub354\uc6b1 \uae4a\uc774 \uc788\ub294 \ub0b4\uc6a9\uc744 \ub2e4\ub904\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc774\ud56d\uacc4\uc218\ub294 \uc870\ud569\ub860\uc5d0\uc11c \uc911\uc694\ud558\uac8c \ub2e4\ub904\uc9c0\ub294 \uac1c\ub150\uc73c\ub85c, \uc8fc\uc5b4\uc9c4 n\uac1c\uc758 \uac1d\uccb4 \uc911\uc5d0\uc11c k\uac1c\ub97c \uc120\ud0dd\ud558\ub294 \uacbd\uc6b0\uc758 \uc218\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ud2b9\ud788, C#\uc744 \ud65c\uc6a9\ud55c \ucf54\ub529 \uba74\uc811 \uc900\ube44\uc5d0 \uc720\uc6a9\ud55c \uc8fc\uc81c\uc785\ub2c8\ub2e4. \ubb38\uc81c \uc124\uba85 \uc8fc\uc5b4\uc9c4 \uc790\uc5f0\uc218 n\uacfc k\uc5d0 \ub300\ud558\uc5ec, \uc774\ud56d\uacc4\uc218 C(n, k)\ub97c \uad6c\ud558\uc2dc\uc624. \uc774\ud56d\uacc4\uc218\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ub429\ub2c8\ub2e4: C(n, k) = n! \/ (k! * &hellip; <a href=\"https:\/\/atmokpo.com\/w\/27505\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;C# \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc774\ud56d\uacc4\uc218 \uad6c\ud558\uae30 2&#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":[24],"tags":[],"class_list":["post-27505","post","type-post","status-publish","format-standard","hentry","category-c--"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - 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