{"id":27788,"date":"2024-10-27T14:43:51","date_gmt":"2024-10-27T14:43:51","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=27788"},"modified":"2024-11-26T07:15:03","modified_gmt":"2024-11-26T07:15:03","slug":"c-%ec%bd%94%eb%94%a9%ed%85%8c%ec%8a%a4%ed%8a%b8-%ea%b0%95%ec%a2%8c-%ed%8a%b8%eb%a6%ac%ec%9d%98-%ec%a7%80%eb%a6%84-%ea%b5%ac%ed%95%98%ea%b8%b0-2","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/27788\/","title":{"rendered":"C++ \ucf54\ub529\ud14c\uc2a4\ud2b8 \uac15\uc88c, \ud2b8\ub9ac\uc758 \uc9c0\ub984 \uad6c\ud558\uae30"},"content":{"rendered":"

<\/p>\n

1. \ubb38\uc81c \uc815\uc758<\/h2>\n

\uc8fc\uc5b4\uc9c4 \ud2b8\ub9ac\uc758 \uc9c0\ub984\uc744 \uad6c\ud558\ub294 \ubb38\uc81c\uc785\ub2c8\ub2e4. \ud2b8\ub9ac\uc758 \uc9c0\ub984\uc740 \ub450 \ub178\ub4dc \uac04\uc758 \ucd5c\uc7a5 \uacbd\ub85c\uc758 \uae38\uc774\ub97c \ub9d0\ud569\ub2c8\ub2e4. \ud2b8\ub9ac\ub294 \ub178\ub4dc\uc640 \uac04\uc120\uc73c\ub85c \uad6c\uc131\ub41c \uadf8\ub798\ud504\ub85c, \uc0ac\uc774\ud074\uc774 \uc5c6\ub294 \uc5f0\uacb0 \uadf8\ub798\ud504\uc785\ub2c8\ub2e4. \uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574 DFS(Depth First Search) \ub610\ub294 BFS(Breadth First Search) \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

2. \ubb38\uc81c \uc785\ub825<\/h2>\n

\uccab \ubc88\uc9f8 \uc904\uc5d0 \ub178\ub4dc\uc758 \uac1c\uc218 N<\/code>\uc774 \uc8fc\uc5b4\uc9d1\ub2c8\ub2e4. \ub2e4\uc74c \uc904\ubd80\ud130 N-1<\/code>\uac1c\uc758 \uc904\uc5d0\ub294 \uac04\uc120\uc774 \uc8fc\uc5b4\uc9c0\uba70, \uac01 \uac04\uc120\uc740 \ub450 \uac1c\uc758 \uc815\uc218 a<\/code>\uc640 b<\/code>\ub85c \ud45c\ud604\ub429\ub2c8\ub2e4. \uc774\ub294 \ub178\ub4dc a<\/code>\uc640 \ub178\ub4dc b<\/code> \uc0ac\uc774\uc5d0 \uac04\uc120\uc774 \uc874\uc7ac\ud568\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n

\uc785\ub825 \uc608\uc2dc<\/h3>\n
\n    5\n    1 2\n    1 3\n    2 4\n    2 5\n    <\/pre>\n
3. \ubb38\uc81c \ucd9c\ub825<\/h2>\n
\ud2b8\ub9ac\uc758 \uc9c0\ub984\uc744 \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/p>\n
\ucd9c\ub825 \uc608\uc2dc<\/h3>\n
\n    3\n    <\/pre>\n
4. \uc54c\uace0\ub9ac\uc998 \uc124\uba85<\/h2>\n
\ud2b8\ub9ac\uc758 \uc9c0\ub984\uc744 \uad6c\ud558\uae30 \uc704\ud55c \uc54c\uace0\ub9ac\uc998\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \ub2e8\uacc4\ub85c \uc9c4\ud589\ub429\ub2c8\ub2e4:<\/p>\n
    \n
  1. \ud2b8\ub9ac\ub97c \uc778\uc811 \ub9ac\uc2a4\ud2b8 \ud615\ud0dc\ub85c \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/li>\n
  2. \uccab \ubc88\uc9f8 DFS\ub97c \ud1b5\ud574 \uac00\uc7a5 \uba40\ub9ac \uc788\ub294 \ub178\ub4dc\ub97c \ucc3e\uc2b5\ub2c8\ub2e4.<\/li>\n
  3. \ub450 \ubc88\uc9f8 DFS\ub97c \uc0ac\uc6a9\ud574 \uccab \ubc88\uc9f8 DFS\uc5d0\uc11c \ucc3e\uc740 \ub178\ub4dc\ub85c\ubd80\ud130 \uac00\uc7a5 \uba40\ub9ac \uc788\ub294 \ub178\ub4dc\ub97c \ucc3e\uc2b5\ub2c8\ub2e4.<\/li>\n
  4. \ub450 \ubc88\uc9f8 DFS\uc758 \uacb0\uacfc\uac00 \ud2b8\ub9ac\uc758 \uc9c0\ub984\uc785\ub2c8\ub2e4.<\/li>\n<\/ol>\n
    5. C++ \ucf54\ub4dc \uad6c\ud604<\/h2>\n
    \ud2b8\ub9ac\uc758 \uc9c0\ub984\uc744 \uacc4\uc0b0\ud558\ub294 C++ \ucf54\ub4dc\ub294 \uc544\ub798\uc640 \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n
    \n#include \n#include \n#include \n\nusing namespace std;\n\nvector> tree;\nvector visited;\n\nint furthestNode(int node) {\n    visited[node] = true;\n\n    int maxDistance = 0;\n    int farthestNode = node;\n\n    for (int neighbor : tree[node]) {\n        if (!visited[neighbor]) {\n            int distance = furthestNode(neighbor) + 1;\n            if (distance > maxDistance) {\n                maxDistance = distance;\n                farthestNode = neighbor;\n            }\n        }\n    }\n\n    return farthestNode;\n}\n\nint main() {\n    int N;\n    cin >> N;\n\n    tree.resize(N + 1);\n    visited.resize(N + 1, false);\n\n    for (int i = 0; i < N - 1; i++) {\n        int a, b;\n        cin >> a >> b;\n        tree[a].push_back(b);\n        tree[b].push_back(a);\n    }\n\n    int farthestFromStart = furthestNode(1);\n    \n    fill(visited.begin(), visited.end(), false);\n    \n    int diameterEnd = furthestNode(farthestFromStart);\n    \n    cout << diameterEnd << endl;\n\n    return 0;\n}\n    <\/bool><\/vector<\/algorithm><\/vector><\/iostream><\/code><\/pre>\n
    6. \ucf54\ub4dc \uc124\uba85<\/h2>\n
    \ucf54\ub4dc\ub294 \uc544\ub798\uc640 \uac19\uc740 \uad6c\uc870\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n
      \n
    1. \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \ud3ec\ud568\ud558\uace0, \uc804\uc5ed \ubcc0\uc218\ub97c \uc120\uc5b8\ud569\ub2c8\ub2e4.<\/li>\n
    2. furthestNode<\/code> \ud568\uc218\ub97c \ud1b5\ud574 DFS\ub97c \uc218\ud589\ud558\uba70 \uac00\uc7a5 \uba40\ub9ac \uc788\ub294 \ub178\ub4dc\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4.<\/li>\n
    3. \uba54\uc778 \ud568\uc218\uc5d0\uc11c \uc785\ub825\uc744 \ubc1b\uace0, \ud2b8\ub9ac\ub97c \uad6c\uc131\ud569\ub2c8\ub2e4.<\/li>\n
    4. \uccab \ubc88\uc9f8 DFS\ub97c \ud1b5\ud574 \uc2dc\uc791 \ub178\ub4dc\uc5d0\uc11c \uac00\uc7a5 \uba40\ub9ac \uc788\ub294 \ub178\ub4dc\ub97c \ucc3e\uc2b5\ub2c8\ub2e4.<\/li>\n
    5. \ub450 \ubc88\uc9f8 DFS\ub97c \ud1b5\ud574 \uccab \ubc88\uc9f8 DFS\uc5d0\uc11c \ucc3e\uc740 \ub178\ub4dc\ub85c\ubd80\ud130 \uac00\uc7a5 \uba40\ub9ac \uc788\ub294 \ub178\ub4dc\ub97c \ucc3e\uace0, \uc774 \ub178\ub4dc\uac00 \uc9c0\ub984\uc758 \ub05d\uc785\ub2c8\ub2e4.<\/li>\n
    6. \uc9c0\ub984\uc758 \uae38\uc774\ub97c \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n
      7. \uc2dc\uac04 \ubcf5\uc7a1\ub3c4 \ubd84\uc11d<\/h2>\n
      \uc774 \uc54c\uace0\ub9ac\uc998\uc758 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(N)<\/code>\uc785\ub2c8\ub2e4. N\uac1c\uc758 \ub178\ub4dc\ub97c \ubc29\ubb38\ud558\ub294 \uacfc\uc815\uc5d0\uc11c \uac01 \ub178\ub4dc\uc5d0 \ub300\ud574 DFS\ub97c \uc218\ud589\ud558\uae30 \ub54c\ubb38\uc5d0, \ud2b8\ub9ac\uc758 \ud06c\uae30\uc5d0 \ube44\ub840\ud569\ub2c8\ub2e4.<\/p>\n
      8. \uacb0\ub860<\/h2>\n
      \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \ud2b8\ub9ac\uc758 \uc9c0\ub984\uc744 \uad6c\ud558\ub294 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uac8c \ub418\uc5c8\uc2b5\ub2c8\ub2e4. DFS\ub97c \ud65c\uc6a9\ud558\uc5ec \ud2b8\ub9ac\uc758 \uad6c\uc870\ub97c \ud0d0\uc0c9\ud558\uace0 \uc194\ub8e8\uc158\uc744 \ub3c4\ucd9c\ud558\ub294 \uacfc\uc815\uc744 \uc774\ud574\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \ub2e4\uc591\ud55c \uadf8\ub798\ud504 \ubb38\uc81c\ub97c \uc5f0\uc2b5\ud568\uc73c\ub85c\uc368 \uc54c\uace0\ub9ac\uc998 \uc2e4\ub825\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uae38 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n
      9. \ucc38\uace0 \uc790\ub8cc<\/h2>\n