{"id":29197,"date":"2024-10-27T16:17:14","date_gmt":"2024-10-27T16:17:14","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=29197"},"modified":"2024-11-26T06:53:40","modified_gmt":"2024-11-26T06:53:40","slug":"%eb%a8%b8%ec%8b%a0%eb%9f%ac%eb%8b%9d-%eb%b0%8f-%eb%94%a5%eb%9f%ac%eb%8b%9d-%ec%95%8c%ea%b3%a0%eb%a6%ac%ec%a6%98-%ed%8a%b8%eb%a0%88%ec%9d%b4%eb%94%a9-%ec%97%90%ec%9d%b4%eb%8b%a4%eb%b6%80%ec%8a%a4","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/29197\/","title":{"rendered":"\uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529, \uc5d0\uc774\ub2e4\ubd80\uc2a4\ud2b8 \uc54c\uace0\ub9ac\ub4ec"},"content":{"rendered":"<p><body><\/p>\n<div class=\"container\">\n<p>\uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc758 \uc138\uacc4\ub294 \ub0a0\ub85c \ubc1c\uc804\ud558\uace0 \uc788\uc73c\uba70, \uadf8 \uc911 \uba38\uc2e0\ub7ec\ub2dd\uacfc \ub525\ub7ec\ub2dd\uc740 \ub354\uc6b1 \uc9c4\ubcf4\ub41c \uc804\ub7b5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd\uc774 \uc5b4\ub5bb\uac8c \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc5d0\uc11c \ud65c\uc6a9\ub418\ub294\uc9c0, \ud2b9\ud788 AdaBoost \uc54c\uace0\ub9ac\uc998\uc5d0 \ub300\ud574 \uc2ec\uce35\uc801\uc73c\ub85c \uc18c\uac1c\ud560 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<h2>1. \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc774\ub780?<\/h2>\n<p>\uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc740 \uc218\ud559\uc801 \ubaa8\ub378\uacfc \uc54c\uace0\ub9ac\uc998\uc744 \ud1b5\ud574 \uc790\ub3d9\uc73c\ub85c \uac70\ub798 \uacb0\uc815\uc744 \ub0b4\ub9ac\ub294 \ubc29\uc2dd\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ud2b8\ub808\uc774\ub354\ub294 \uac10\uc815\uc5d0 \ud718\ub458\ub9ac\uc9c0 \uc54a\uace0, \uc2e0\uc18d\ud558\uace0 \uc815\ud655\ud558\uac8c \uc2dc\uc7a5\uc5d0 \ubc18\uc751\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>1.1 \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc758 \uc7a5\uc810<\/h3>\n<ul>\n<li>\ube60\ub978 \uac70\ub798 \ucc98\ub9ac \uc18d\ub3c4<\/li>\n<li>\uac10\uc815\uc801 \uacb0\uc815 \ud68c\ud53c<\/li>\n<li>\ubc31\ud14c\uc2a4\ud305\uc744 \ud1b5\ud55c \uc804\ub7b5 \uac80\uc99d<\/li>\n<li>\uc8fc\ubb38 \uc2e4\ud589\uc758 \uc77c\uad00\uc131<\/li>\n<\/ul>\n<h2>2. \uba38\uc2e0\ub7ec\ub2dd\uacfc \ub525\ub7ec\ub2dd: \uac1c\uc694<\/h2>\n<p>\uba38\uc2e0\ub7ec\ub2dd\uc740 \ub370\uc774\ud130\ub85c\ubd80\ud130 \ud559\uc2b5\ud558\uc5ec \uc608\uce21\ud558\ub294 \uc54c\uace0\ub9ac\uc998\uc744 \uc5f0\uad6c\ud558\ub294 \ubd84\uc57c\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uacfc\uac70 \ub370\uc774\ud130\ub97c \uae30\ubc18\uc73c\ub85c \ubbf8\ub798\uc758 \uc2dc\uc7a5 \ub3d9\ud5a5\uc744 \uc608\uce21\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>2.1 \uba38\uc2e0\ub7ec\ub2dd\uc758 \uc720\ud615<\/h3>\n<p>\uba38\uc2e0\ub7ec\ub2dd\uc740 \ud06c\uac8c \uc138 \uac00\uc9c0 \uc720\ud615\uc73c\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>\uc9c0\ub3c4 \ud559\uc2b5<\/strong>: \ub77c\ubca8\uc774 \uc788\ub294 \ub370\uc774\ud130\ub85c \ud559\uc2b5\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc8fc\uc2dd \uac00\uaca9\uc774 \uc0c1\uc2b9\ud560\uc9c0\ub97c \uc608\uce21\ud558\ub294 \ubaa8\ub378\uc785\ub2c8\ub2e4.<\/li>\n<li><strong>\ube44\uc9c0\ub3c4 \ud559\uc2b5<\/strong>: \ub77c\ubca8\uc774 \uc5c6\ub294 \ub370\uc774\ud130\ub85c \ud559\uc2b5\ud569\ub2c8\ub2e4. \ub370\uc774\ud130\uc758 \ud328\ud134\uc744 \ucc3e\uac70\ub098 \ud074\ub7ec\uc2a4\ud130\ub9c1\uc744 \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\uac15\ud654 \ud559\uc2b5<\/strong>: \uc5d0\uc774\uc804\ud2b8\uac00 \ud658\uacbd\uacfc \uc0c1\ud638\uc791\uc6a9\ud558\uba70 \ubcf4\uc0c1\uc744 maximization\ud558\ub294 \ubc29\uc2dd\uc73c\ub85c \ud559\uc2b5\ud569\ub2c8\ub2e4. \uc8fc\uc2dd \uac70\ub798\uc5d0\uc11c\uc758 \ucd5c\uc801 \ud589\ub3d9\uc744 \ucc3e\ub294 \ub370 \uc720\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>2.2 \ub525\ub7ec\ub2dd\uc758 \uc811\uadfc \ubc29\uc2dd<\/h3>\n<p>\ub525\ub7ec\ub2dd\uc740 \uba38\uc2e0\ub7ec\ub2dd\uc758 \ud55c \ubd84\uc57c\ub85c, \uc778\uacf5\uc2e0\uacbd\ub9dd\uc744 \uae30\ubc18\uc73c\ub85c \ud55c \ubcf5\uc7a1\ud55c \ubaa8\ub378\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uc5ec\ub7ec \uce35\uc758 \uc2e0\uacbd\ub9dd\uc744 \ud1b5\ud574 \ub370\uc774\ud130\uc5d0\uc11c \ub354 \uae4a\uc740 \uc758\ubbf8\ub97c \ud559\uc2b5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>3. \uc5d0\uc774\ub2e4\ubd80\uc2a4\ud2b8 (AdaBoost) \uc54c\uace0\ub9ac\uc998<\/h2>\n<p>AdaBoost\ub294 \u2018Adaptive Boosting\u2019\uc758 \uc57d\uc790\ub85c, \uc57d\ud55c \ud559\uc2b5\uae30(weak learner)\ub97c \uacb0\ud569\ud574 \uac15\ud55c \ud559\uc2b5\uae30(strong learner)\ub97c \ub9cc\ub4dc\ub294 \ubc29\uc2dd\uc785\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \ud2b9\ud788 \ubd84\ub958 \ubb38\uc81c\uc5d0\uc11c \ub192\uc740 \uc131\ub2a5\uc744 \ubc1c\ud718\ud569\ub2c8\ub2e4.<\/p>\n<h3>3.1 AdaBoost\uc758 \uc6d0\ub9ac<\/h3>\n<p>AdaBoost \uc54c\uace0\ub9ac\uc998\uc740 \uc5ec\ub7ec \uac1c\uc758 \uc57d\ud55c \ud559\uc2b5\uae30\ub97c \uc21c\ucc28\uc801\uc73c\ub85c \ud559\uc2b5\ud558\uc5ec \ucd5c\uc885 \ubaa8\ub378\uc744 \uad6c\ucd95\ud569\ub2c8\ub2e4. \uac01 \ub2e8\uacc4\uc5d0\uc11c\ub294 \uc774\uc804 \ubaa8\ub378\uc774 \uc798\ubabb \uc608\uce21\ud55c \uc0d8\ud50c\uc5d0 \ub354 \ub192\uc740 \uac00\uc911\uce58\ub97c \ubd80\uc5ec\ud568\uc73c\ub85c\uc368, \uc624\ub958\ub97c \uc904\uc774\ub294 \ub370 \ucd08\uc810\uc744 \ub9de\ucda5\ub2c8\ub2e4.<\/p>\n<h3>3.2 AdaBoost\uc758 \uad6c\uc131 \uc694\uc18c<\/h3>\n<ul>\n<li><strong>\uac00\uc911\uce58 \uc870\uc815:<\/strong> \uac01 \uc0d8\ud50c\uc758 \uac00\uc911\uce58\ub97c \uc870\uc815\ud558\uc5ec \uc798\ubabb \ubd84\ub958\ub41c \uc0d8\ud50c\uc5d0 \ub300\ud574 \ub354 \ub192\uc740 \uc911\uc694\uc131\uc744 \ubd80\uc5ec\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uc57d\ud55c \ud559\uc2b5\uae30:<\/strong> \ubcf4\ud1b5 \uac04\ub2e8\ud55c \uacb0\uc815 \ud2b8\ub9ac\uc778 stumps\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac01 \ub2e8\uacc4\uc5d0\uc11c \ud559\uc2b5\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uacb0\uacfc \uacb0\ud569:<\/strong> \ubaa8\ub4e0 \uc57d\ud55c \ud559\uc2b5\uae30\uc758 \ucd9c\ub825\uc744 \uac00\uc911 \ud3c9\uade0\ud558\uc5ec \ucd5c\uc885 \uc608\uce21\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>3.3 AdaBoost\uc758 \uc7a5\uc810 \ubc0f \ub2e8\uc810<\/h3>\n<h4>\uc7a5\uc810<\/h4>\n<ul>\n<li>\uc131\ub2a5 \ud5a5\uc0c1: \uc57d\ud55c \ud559\uc2b5\uae30\ub97c \uc870\ud569\ud568\uc73c\ub85c\uc368, \uc131\ub2a5\uc774 \ud06c\uac8c \ud5a5\uc0c1\ub429\ub2c8\ub2e4.<\/li>\n<li>\uac04\ub2e8\ud55c \uad6c\ud604: \uc0c1\ub300\uc801\uc73c\ub85c \uac04\ub2e8\ud55c \uc54c\uace0\ub9ac\uc998\uc73c\ub85c \uc2e4\ud604 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h4>\ub2e8\uc810<\/h4>\n<ul>\n<li>\ub178\uc774\uc988 \ubbfc\uac10\uc131: \ub178\uc774\uc988\uac00 \ub9ce\uc740 \ub370\uc774\ud130\uc5d0\uc11c\ub294 \uacfc\uc801\ud569(overfitting)\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li>\ud55c\uc815\ub41c \uc57d\ud55c \ud559\uc2b5\uae30: \uc77c\ubc18\uc801\uc73c\ub85c \uc798\ubabb\ub41c \uc608\uce21 \uc0d8\ud50c\uc5d0 \ub192\uc740 \uac00\uc911\uce58\ub97c \ubd80\uc5ec\ud558\uae30 \ub54c\ubb38\uc5d0, \uc798\ubabb\ub41c \ub370\uc774\ud130\ub85c \ud559\uc2b5\ud560 \uc704\ud5d8\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>4. AdaBoost\ub97c \uc774\uc6a9\ud55c \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529 \ubaa8\ub378 \uad6c\ucd95\ud558\uae30<\/h2>\n<p>\uc774\uc81c AdaBoost\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc2e4\uc81c \ud2b8\ub808\uc774\ub529 \ubaa8\ub378\uc744 \uad6c\ucd95\ud574\ubd05\uc2dc\ub2e4. \uc774\ub97c \uc704\ud574 \ub2e4\uc74c\uacfc \uac19\uc740 \ub2e8\uacc4\ub97c \uac70\uce60 \uac83\uc785\ub2c8\ub2e4:<\/p>\n<ol>\n<li>\ub370\uc774\ud130 \uc218\uc9d1<\/li>\n<li>\ub370\uc774\ud130 \uc804\ucc98\ub9ac<\/li>\n<li>\ud6c8\ub828 \uc138\ud2b8\uc640 \ud14c\uc2a4\ud2b8 \uc138\ud2b8 \ubd84\ud560<\/li>\n<li>AdaBoost \ubaa8\ub378 \ud6c8\ub828<\/li>\n<li>\uc608\uce21 \ubc0f \uc131\ub2a5 \ud3c9\uac00<\/li>\n<\/ol>\n<h3>4.1 \ub370\uc774\ud130 \uc218\uc9d1<\/h3>\n<p>\uc8fc\uc2dd \ub370\uc774\ud130 \ub610\ub294 \ub2e4\ub978 \uae08\uc735 \ub370\uc774\ud130\ub97c \uc218\uc9d1\ud558\ub294 \uac83\uc774 \uccab \ubc88\uc9f8 \ub2e8\uacc4\uc785\ub2c8\ub2e4. Yahoo Finance API\ub098 Alpha Vantage\uc640 \uac19\uc740 \uc11c\ube44\uc2a4\ub97c \uc774\uc6a9\ud558\uc5ec \uc2dc\uacc4\uc5f4 \ub370\uc774\ud130\ub97c \uac00\uc838\uc62c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>4.2 \ub370\uc774\ud130 \uc804\ucc98\ub9ac<\/h3>\n<p>\ub178\uc774\uc988\ub97c \uc81c\uac70\ud558\uace0, \uacb0\uce21\uce58\ub97c \ucc98\ub9ac\ud558\uba70, \ud544\uc694\ud55c \ud53c\ucc98\ub97c \uc120\ud0dd\ud569\ub2c8\ub2e4. \ub610\ud55c, \ub808\uc774\ube14\ub9c1\uc774 \ud544\uc694\ud55c \uacbd\uc6b0 \uc8fc\uc2dd \uac00\uaca9\uc758 \uc0c1\uc2b9 \ub610\ub294 \ud558\ub77d\uc744 \uae30\uc900\uc73c\ub85c \ub370\uc774\ud130\ub97c \ub77c\ubca8\ub9c1\ud569\ub2c8\ub2e4.<\/p>\n<h3>4.3 \ud6c8\ub828 \uc138\ud2b8\uc640 \ud14c\uc2a4\ud2b8 \uc138\ud2b8 \ubd84\ud560<\/h3>\n<p>\uc77c\ubc18\uc801\uc73c\ub85c 70%\uc758 \ub370\uc774\ud130\ub97c \ud6c8\ub828\uc6a9\uc73c\ub85c, 30%\uc758 \ub370\uc774\ud130\ub97c \ud14c\uc2a4\ud2b8\uc6a9\uc73c\ub85c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \ub370\uc774\ud130\uc758 \uc2dc\uacc4\uc5f4\uc801\uc778 \uc131\uc9c8\uc744 \uace0\ub824\ud558\uc5ec, \uc2dc\uac04\uc758 \ud750\ub984\uc5d0 \ub530\ub77c \ub370\uc774\ud130\uc14b\uc744 \ubd84\ub9ac\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\n<h3>4.4 AdaBoost \ubaa8\ub378 \ud6c8\ub828<\/h3>\n<pre><code>\nfrom sklearn.ensemble import AdaBoostClassifier\nfrom sklearn.tree import DecisionTreeClassifier\n\n# \uc57d\ud55c \ud559\uc2b5\uae30 \ubd88\ub7ec\uc624\uae30\nweak_classifier = DecisionTreeClassifier(max_depth=1)\n\n# AdaBoost \ubaa8\ub378 \ud6c8\ub828\nadaBoost_model = AdaBoostClassifier(base_estimator=weak_classifier, n_estimators=50)\nadaBoost_model.fit(X_train, y_train)\n        <\/code><\/pre>\n<h3>4.5 \uc608\uce21 \ubc0f \uc131\ub2a5 \ud3c9\uac00<\/h3>\n<p>\ud6c8\ub828\ub41c \ubaa8\ub378\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud14c\uc2a4\ud2b8 \uc138\ud2b8\uc758 \uc608\uce21\uc744 \uc218\ud589\ud55c \ud6c4, \uc815\ud655\ub3c4 \ubc0f \uae30\ud0c0 \uc131\ub2a5 \uc9c0\ud45c\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>\nfrom sklearn.metrics import accuracy_score\n\n# \ud14c\uc2a4\ud2b8 \uc138\ud2b8\uc5d0 \ub300\ud55c \uc608\uce21\ny_pred = adaBoost_model.predict(X_test)\n\n# \uc815\ud655\ub3c4 \ud3c9\uac00\naccuracy = accuracy_score(y_test, y_pred)\nprint(f'\ubaa8\ub378 \uc815\ud655\ub3c4: {accuracy * 100:.2f}%')\n        <\/code><\/pre>\n<h2>5. \uacb0\ub860<\/h2>\n<p>AdaBoost\ub294 \uac15\ub825\ud55c \uc131\ub2a5\uc744 \ubc1c\ud718\ud558\ub294 \uc54c\uace0\ub9ac\uc998\uc73c\ub85c, \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc5d0\uc11c \uc720\uc6a9\ud558\uac8c \ud65c\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uba38\uc2e0\ub7ec\ub2dd\uacfc \ub525\ub7ec\ub2dd\uc758 \ubc1c\uc804\uc73c\ub85c \uc778\ud574 \ub354\uc6b1 \uc815\uad50\ud55c \ubaa8\ub378\uc744 \uad6c\ucd95\ud560 \uc218 \uc788\uc73c\uba70, \uc774\ub97c \ud1b5\ud574 \uc2dc\uc7a5\uc5d0\uc11c\uc758 \uacbd\uc7c1\ub825\uc744 \ub192\uc77c \uc218 \uc788\uc744 \uac83\uc785\ub2c8\ub2e4. \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc740 \ubcf5\uc7a1\ud55c \ub370\uc774\ud130 \ubd84\uc11d\uacfc \uacb0\uc815 \uacfc\uc815\uc744 \uc218\ubc18\ud558\ubbc0\ub85c, \uc9c0\uc18d\uc801\uc778 \ud559\uc2b5\uacfc \uc5f0\uad6c\uac00 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n<p>\uc9c0\uae08\uae4c\uc9c0 AdaBoost \uc54c\uace0\ub9ac\uc998\uc758 \uac1c\uc694\uc640 \uadf8\uac83\uc744 \ud65c\uc6a9\ud55c \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529 \ubaa8\ub378 \uad6c\ucd95 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc0b4\ud3b4\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \uc774 \uae00\uc774 \uc5ec\ub7ec\ubd84\uc758 \ud2b8\ub808\uc774\ub529 \uc804\ub7b5 \uac1c\ubc1c\uc5d0 \ub3c4\uc6c0\uc774 \ub418\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n<\/div>\n<p><\/body><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc758 \uc138\uacc4\ub294 \ub0a0\ub85c \ubc1c\uc804\ud558\uace0 \uc788\uc73c\uba70, \uadf8 \uc911 \uba38\uc2e0\ub7ec\ub2dd\uacfc \ub525\ub7ec\ub2dd\uc740 \ub354\uc6b1 \uc9c4\ubcf4\ub41c \uc804\ub7b5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uba38\uc2e0\ub7ec\ub2dd \ubc0f \ub525\ub7ec\ub2dd\uc774 \uc5b4\ub5bb\uac8c \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc5d0\uc11c \ud65c\uc6a9\ub418\ub294\uc9c0, \ud2b9\ud788 AdaBoost \uc54c\uace0\ub9ac\uc998\uc5d0 \ub300\ud574 \uc2ec\uce35\uc801\uc73c\ub85c \uc18c\uac1c\ud560 \uac83\uc785\ub2c8\ub2e4. 1. \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc774\ub780? \uc54c\uace0\ub9ac\uc998 \ud2b8\ub808\uc774\ub529\uc740 \uc218\ud559\uc801 \ubaa8\ub378\uacfc \uc54c\uace0\ub9ac\uc998\uc744 \ud1b5\ud574 \uc790\ub3d9\uc73c\ub85c \uac70\ub798 \uacb0\uc815\uc744 \ub0b4\ub9ac\ub294 \ubc29\uc2dd\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ud2b8\ub808\uc774\ub354\ub294 \uac10\uc815\uc5d0 \ud718\ub458\ub9ac\uc9c0 \uc54a\uace0, \uc2e0\uc18d\ud558\uace0 \uc815\ud655\ud558\uac8c \uc2dc\uc7a5\uc5d0 \ubc18\uc751\ud560 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