\ub0a8\uc544 \uc788\ub294 \uc218\ub4e4\uc740 \ubaa8\ub450 \uc18c\uc218\uc785\ub2c8\ub2e4.<\/li>\n<\/ol>\nC# \ucf54\ub4dc \uad6c\ud604<\/h2>\n
\n \ub2e4\uc74c\uc740 \uc704\uc758 \uc54c\uace0\ub9ac\uc998\uc744 C#\uc73c\ub85c \uad6c\ud604\ud55c \ucf54\ub4dc\uc785\ub2c8\ub2e4:\n <\/p>\n
\n \n using System;\n using System.Collections.Generic;\n\n class Program {\n static void Main(string[] args) {\n int N = int.Parse(Console.ReadLine());\n bool[] isPrime = new bool[N + 1];\n \n for (int i = 2; i <= N; i++) {\n isPrime[i] = true; \/\/ \ubaa8\ub4e0 \uc218\ub97c \uc18c\uc218\ub85c \ucd08\uae30\ud654\n }\n\n for (int i = 2; i * i <= N; i++) {\n if (isPrime[i]) { \/\/ i\uac00 \uc18c\uc218\uc778 \uacbd\uc6b0\n for (int j = i * i; j <= N; j += i) {\n isPrime[j] = false; \/\/ i\uc758 \ubc30\uc218\ub97c \uc18c\uc218\uac00 \uc544\ub2d8\uc73c\ub85c \uc124\uc815\n }\n }\n }\n\n for (int i = 2; i <= N; i++) {\n if (isPrime[i]) {\n Console.WriteLine(i); \/\/ \uc18c\uc218 \ucd9c\ub825\n }\n }\n }\n }\n <\/code>\n <\/pre>\n\ucf54\ub4dc \uc124\uba85<\/h2>\n
\n \uc704 \ucf54\ub4dc\ub294 C#\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc5d0\ub77c\ud1a0\uc2a4\ud14c\ub124\uc2a4\uc758 \uccb4 \uc54c\uace0\ub9ac\uc998\uc744 \uad6c\ud604\ud55c \uac83\uc785\ub2c8\ub2e4.
\n \uac01 \uc904\uc744 \uc790\uc138\ud788 \uc0b4\ud3b4\ubcf4\uba70 \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.\n <\/p>\n
\n- using System;<\/strong>: C#\uc758 \uc2dc\uc2a4\ud15c \ub124\uc784\uc2a4\ud398\uc774\uc2a4\ub97c \uc0ac\uc6a9\ud558\uae30 \uc704\ud574 \ucd94\uac00\ud569\ub2c8\ub2e4.<\/li>\n
- using System.Collections.Generic;<\/strong>: \ub9ac\uc2a4\ud2b8\uc640 \uac19\uc740 \uceec\ub809\uc158\uc744 \uc0ac\uc6a9\ud558\uae30 \uc704\ud574 \ud544\uc694\ud569\ub2c8\ub2e4.<\/li>\n
- int N = int.Parse(Console.ReadLine());<\/strong>: \uc0ac\uc6a9\uc790\ub85c\ubd80\ud130 \uc785\ub825\uc744 \ubc1b\uc544 N\uc5d0 \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/li>\n
- bool[] isPrime = new bool[N + 1];<\/strong>: 0\ubd80\ud130 N\uae4c\uc9c0\uc758 \uac01 \uc22b\uc790\uac00 \uc18c\uc218\uc778\uc9c0 \uc5ec\ubd80\ub97c \uc800\uc7a5\ud558\uae30 \uc704\ud574 \ubc30\uc5f4\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/li>\n
- for (int i = 2; i <= N; i++) { isPrime[i] = true; }<\/strong>: \ubaa8\ub4e0 \uc218\ub97c \uc18c\uc218\ub85c \ucd08\uae30\ud654\ud569\ub2c8\ub2e4.<\/li>\n
- for (int i = 2; i * i <= N; i++) { … }<\/strong>: N\uc758 \uc81c\uacf1\uadfc\uae4c\uc9c0 \ubc18\ubcf5\ud558\uba74\uc11c \uc18c\uc218\ub97c \ucc3e\uc2b5\ub2c8\ub2e4.<\/li>\n
- if (isPrime[i]) { … }<\/strong>: i\uac00 \uc18c\uc218\ub77c\uba74, \uadf8 \ubc30\uc218\ub97c \ubaa8\ub450 \uc18c\uc218\uac00 \uc544\ub2d8\uc73c\ub85c \uc124\uc815\ud569\ub2c8\ub2e4.<\/li>\n
- for (int i = 2; i <= N; i++) { if (isPrime[i]) { Console.WriteLine(i); }}<\/strong>: \ucd5c\uc885\uc801\uc73c\ub85c \ub0a8\uc544 \uc788\ub294 \uc18c\uc218\ub97c \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n
\ud6a8\uc728\uc131<\/h2>\n
\n \uc5d0\ub77c\ud1a0\uc2a4\ud14c\ub124\uc2a4\uc758 \uccb4 \uc54c\uace0\ub9ac\uc998\uc740 O(N log log N)\uc758 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub97c \uac00\uc9c0\uba70,
\n \uacf5\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(N)\uc785\ub2c8\ub2e4. \ub530\ub77c\uc11c N\uc774 1,000,000\uacfc \uac19\uc740 \ud070 \uc218\uc77c\uc9c0\ub77c\ub3c4
\n \ucda9\ubd84\ud788 \ube60\ub974\uac8c \uc18c\uc218\ub97c \ucc3e\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n <\/p>\n
\uacb0\ub860<\/h2>\n
\n \uc774\ubc88 \ud3ec\uc2a4\ud305\uc5d0\uc11c\ub294 C#\uc744 \uc774\uc6a9\ud55c \uc2e0\uae30\ud55c \uc18c\uc218 \ucc3e\uae30 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574
\n \uc5d0\ub77c\ud1a0\uc2a4\ud14c\ub124\uc2a4\uc758 \uccb4 \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc18c\uc218\ub97c \ucc3e\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4.
\n \uc54c\uace0\ub9ac\uc998 \ubb38\uc81c \ud574\uacb0 \ub2a5\ub825\uc740 \ucf54\ub529 \ud14c\uc2a4\ud2b8 \ubfd0\ub9cc \uc544\ub2c8\ub77c \uc2e4\uc81c \uac1c\ubc1c\uc5d0\uc11c\ub3c4 \ub9e4\uc6b0 \uc911\uc694\ud558\ubbc0\ub85c,
\n \uc9c0\uc18d\uc801\uc778 \ud559\uc2b5\uacfc \uc5f0\uc2b5\uc744 \ud1b5\ud574 \ub2a5\ub825\uc744 \uac15\ud654\ud574 \ub098\uac00\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4.
\n \ub2e4\uc74c \ud3ec\uc2a4\ud305\uc5d0\uc11c\ub294 \ubcf4\ub2e4 \ub2e4\uc591\ud55c \ubb38\uc81c\ub97c \ud1b5\ud574 \uc54c\uace0\ub9ac\uc998\uc801 \uc0ac\uace0\ub97c \ud655\uc7a5\ud574\ubcf4\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4.\n <\/p>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
\ud604\ub300\uc758 \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c \ud658\uacbd\uc5d0\uc11c\ub294 \ucf54\ub529 \ud14c\uc2a4\ud2b8\uac00 \uc911\uc694\ud55c \uc694\uc18c\ub85c \uc790\ub9ac\ub9e4\uae40\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uae30\uc5c5\ub4e4\uc740 \uc9c0\uc6d0\uc790\uc758 \uc54c\uace0\ub9ac\uc998\uc801 \uc0ac\uace0\uc640 \ubb38\uc81c \ud574\uacb0 \ub2a5\ub825\uc744 \ud3c9\uac00\ud558\uae30 \uc704\ud574 \ub2e4\uc591\ud55c \ubb38\uc81c\ub97c \uc81c\uc2dc\ud569\ub2c8\ub2e4. \uc774\ubc88 \ube14\ub85c\uadf8\uc5d0\uc11c\ub294 \uc2e0\uae30\ud55c \uc18c\uc218 \ucc3e\uae30\ub77c\ub294 \uc8fc\uc81c\ub85c \ucf54\ub529 \ud14c\uc2a4\ud2b8 \ubb38\uc81c\ub97c \ud568\uaed8 \ud480\uc5b4\ubcf4\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4. \ubb38\uc81c \uc124\uba85 \uc8fc\uc5b4\uc9c4 \uc815\uc218 N \uc774\ud558\uc758 \ubaa8\ub4e0 \uc18c\uc218\ub97c \ucc3e\uc544\uc11c \ucd9c\ub825\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud558\uc2dc\uc624. \ub2e8, \uc18c\uc218\ub294 1\uacfc \uc790\uae30 \uc790\uc2e0 \uc678\uc5d0\ub294 \ub098\ub204\uc5b4 \ub5a8\uc5b4\uc9c0\uc9c0 \uc54a\ub294 … \ub354 \ubcf4\uae30 “C# \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc2e0\uae30\ud55c \uc18c\uc218 \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":[24],"tags":[],"class_list":["post-27316","post","type-post","status-publish","format-standard","hentry","category-c--"],"yoast_head":"\nC# \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc2e0\uae30\ud55c \uc18c\uc218 \ucc3e\uae30 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atmokpo.com\/w\/27316\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C# \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc2e0\uae30\ud55c \uc18c\uc218 \ucc3e\uae30 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\" \/>\n<meta property=\"og:description\" content=\"\ud604\ub300\uc758 \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c \ud658\uacbd\uc5d0\uc11c\ub294 \ucf54\ub529 \ud14c\uc2a4\ud2b8\uac00 \uc911\uc694\ud55c \uc694\uc18c\ub85c \uc790\ub9ac\ub9e4\uae40\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uae30\uc5c5\ub4e4\uc740 \uc9c0\uc6d0\uc790\uc758 \uc54c\uace0\ub9ac\uc998\uc801 \uc0ac\uace0\uc640 \ubb38\uc81c \ud574\uacb0 \ub2a5\ub825\uc744 \ud3c9\uac00\ud558\uae30 \uc704\ud574 \ub2e4\uc591\ud55c \ubb38\uc81c\ub97c \uc81c\uc2dc\ud569\ub2c8\ub2e4. \uc774\ubc88 \ube14\ub85c\uadf8\uc5d0\uc11c\ub294 \uc2e0\uae30\ud55c \uc18c\uc218 \ucc3e\uae30\ub77c\ub294 \uc8fc\uc81c\ub85c \ucf54\ub529 \ud14c\uc2a4\ud2b8 \ubb38\uc81c\ub97c \ud568\uaed8 \ud480\uc5b4\ubcf4\ub3c4\ub85d \ud558\uaca0\uc2b5\ub2c8\ub2e4. \ubb38\uc81c \uc124\uba85 \uc8fc\uc5b4\uc9c4 \uc815\uc218 N \uc774\ud558\uc758 \ubaa8\ub4e0 \uc18c\uc218\ub97c \ucc3e\uc544\uc11c \ucd9c\ub825\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud558\uc2dc\uc624. \ub2e8, \uc18c\uc218\ub294 1\uacfc \uc790\uae30 \uc790\uc2e0 \uc678\uc5d0\ub294 \ub098\ub204\uc5b4 \ub5a8\uc5b4\uc9c0\uc9c0 \uc54a\ub294 … \ub354 \ubcf4\uae30 "C# \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \uc2e0\uae30\ud55c \uc18c\uc218 \ucc3e\uae30"\" \/>\n<meta property=\"og:url\" content=\"https:\/\/atmokpo.com\/w\/27316\/\" \/>\n<meta property=\"og:site_name\" content=\"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\" \/>\n<meta property=\"article:published_time\" content=\"2024-10-27T14:10:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-11-26T07:19:40+00:00\" \/>\n<meta name=\"author\" content=\"root\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" 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\ucc3e\uae30\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/atmokpo.com\/w\/#website\",\"url\":\"https:\/\/atmokpo.com\/w\/\",\"name\":\"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/atmokpo.com\/w\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/atmokpo.com\/w\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ko-KR\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/atmokpo.com\/w\/#organization\",\"name\":\"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\",\"url\":\"https:\/\/atmokpo.com\/w\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/atmokpo.com\/w\/wp-content\/uploads\/2024\/11\/logo.png\",\"contentUrl\":\"https:\/\/atmokpo.com\/w\/wp-content\/uploads\/2024\/11\/logo.png\",\"width\":400,\"height\":400,\"caption\":\"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\"},\"image\":{\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/x.com\/bebubo4\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/person\/91b6b3b138fbba0efb4ae64b1abd81d7\",\"name\":\"root\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/708197b41fc6435a7ce22d951b25d4a47e9e904270cb1f04682d4f025066f80c?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/708197b41fc6435a7ce22d951b25d4a47e9e904270cb1f04682d4f025066f80c?s=96&d=mm&r=g\",\"caption\":\"root\"},\"sameAs\":[\"http:\/\/atmokpo.com\/w\"],\"url\":\"https:\/\/atmokpo.com\/w\/author\/root\/\"}]}<\/script>\n<!-- 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