{"id":278,"date":"2024-04-27T11:32:22","date_gmt":"2024-04-27T03:32:22","guid":{"rendered":"https:\/\/seanxd.com\/?p=278"},"modified":"2024-04-27T11:32:25","modified_gmt":"2024-04-27T03:32:25","slug":"zerojudge-a982","status":"publish","type":"post","link":"https:\/\/seanxd.com\/en\/zerojudge-a982\/","title":{"rendered":"ZeroJudge A982: Maze Problem #1"},"content":{"rendered":"\n\n\n

\u7d66\u4f60\u4e00\u500b N\uff0aN \u683c\u7684\u8ff7\u5bae\uff0c\u8ff7\u5bae\u4e2d\u4ee5\u300c#\u300d\u4ee3\u8868\u969c\u7919\u7269<\/strong>\uff0c\u4ee5\u300c.\u300d\u4ee3\u8868\u8def<\/strong>\u3002<\/p>\n\n\n\n

\u4f60\u56fa\u5b9a\u5728 (2, 2) \u51fa\u767c\uff0c\u6700\u5de6\u4e0a\u89d2\u662f (1, 1)\uff0c\u76ee\u7684\u5730\u662f (N-1, N-1)\u3002<\/p>\n\n\n\n

\u6c42\u5305\u62ec\u8d77\u9ede\u548c\u7d42\u9ede\uff0c\u6700\u5c11\u8def\u5f91\u7684\u9577\u5ea6<\/strong>\u3002<\/p>\n\n\n\n

\u7bc4\u4f8b\u6e2c\u8cc7<\/h2>\n\n\n\n
\u7bc4\u4f8b\u8f38\u5165<\/th>\u7bc4\u4f8b\u8f38\u51fa<\/th><\/tr><\/thead>
\u7b2c\u4e00\u884c\u6709\u4e00\u500b\u6b63\u6574\u6578 N (N \u4e0d\u8d85\u904e 100)
\u63a5\u4e0b\u4f86\u6709 N \u884c N \u5217\uff0c\u7531\u300c#\u300d\u548c\u300c.\u300d\u7d44\u6210\u7684\u8ff7\u5bae<\/td>		\u4e00\u500b\u6b63\u6574\u6578\uff0c\u4ee3\u8868\u6700\u77ed\u8def\u5f91\u7684\u9577\u5ea6
\u5982\u679c\u4e0d\u53ef\u80fd\u5230\u9054\u7d42\u9ede\uff0c\u5247\u5370\u51fa\u300cNo solution!\u300d<\/strong><\/td><\/tr>
9
(\u8ff7\u5bae\u8acb\u898b\u4e0b\u8868\u683c)<\/td>		13<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u8f38\u5165\u8ff7\u5bae\u8868\u683c<\/h3>\n\n\n\n
#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td><\/tr>
#<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>#<\/td><\/tr>
#<\/td>.<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>.<\/td>#<\/td><\/tr>
#<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>#<\/td><\/tr>
#<\/td>#<\/td>.<\/td>#<\/td>.<\/td>#<\/td>#<\/td>#<\/td>#<\/td><\/tr>
#<\/td>.<\/td>.<\/td>#<\/td>.<\/td>#<\/td>.<\/td>.<\/td>#<\/td><\/tr>
#<\/td>.<\/td>#<\/td>#<\/td>.<\/td>#<\/td>#<\/td>.<\/td>#<\/td><\/tr>
#<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>.<\/td>#<\/td><\/tr>
#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td>#<\/td><\/tr><\/tbody><\/table>
ZeroJudge A982 \u8f38\u5165\u6e2c\u8cc7\u8868\u683c<\/figcaption><\/figure>\n\n\n\n

\u89e3\u984c\u601d\u8def<\/h2>\n\n\n\n

\u672c\u984c\u5982\u679c\u4f7f\u7528DFS\u6703\u6709TLE<\/strong>\u7684\u60c5\u6cc1\u51fa\u73fe\uff0c\u6240\u4ee5\u53ea\u80fd\u4f7f\u7528BFS<\/strong>\u7684\u65b9\u5f0f\u8d70\uff0c\u7576\u6c92\u6709\u8d77\u9ede\u6642\u5c31\u4ee3\u8868\u7121\u6cd5\u8d70\u5230\u7d42\u9ede<\/strong>\u8f38\u51faNo solution!\u3002<\/p>\n\n\n\n

\u7576\u8d70\u5230\u7d42\u9ede\u6642\u53ef\u4ee5\u76f4\u63a5\u8f38\u51fa\u76ee\u524d\u7684\u6b65\u6578\uff0c\u56e0\u70ba\u5148\u8dd1\u5230\u7684\u5c31\u6703\u662f\u6700\u77ed\u8ddd\u96e2<\/strong>\u3002<\/p>\n\n\n\n

\u9700\u8981\u6ce8\u610f\u7684\u662f\u9700\u8981\u6709\u4e00\u500b Map \u4f86\u5b58\u5df2\u7d93\u8d70\u904e\u7684\u9ede<\/strong>\uff0c\u4e0d\u80fd\u91cd\u8907\u8d70\u5230\u540c\u4e00\u500b\u9ede<\/strong>\u4e0d\u7136\u6703\u6709\u7121\u9650\u8ff4\u5708\u7684\u60c5\u6cc1\u51fa\u73fe\u3002<\/p>\n\n\n\n

\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\uff0dZeroJudge A982: \u8ff7\u5bae\u554f\u984c#1<\/a><\/h3>\n\n\n\n
#include <iostream>\n#include <vector>\n#include <map>\nusing namespace std;\n\nvector<vector<char>>v;\nint N, minn = 99999;\n\npair<int, int> axis (int y, int x)\n{\n    pair<int, int>tmp;\n    tmp.first = y;\n    tmp.second = x;\n    return tmp;\n}\n\nvoid BFS(vector<pair<int, int>>start, int count, map<pair<int, int>, int>MAP)\n{\n    if (start.size() == 0)\n    {\n        cout << "No solution!\\n";\n        return;\n    }\n    vector<pair<int, int>>newStart;\n    for (int i = 0; i<start.size(); i++)\n    {\n        int y = start[i].first, x = start[i].second;\n        MAP[axis(y, x)]++;\n        if (y == N-1 && x == N-1)\n        {\n            cout << count << "\\n";\n            return;\n        }\n        if (y-1 >= 0 && v[y-1][x] == '.' && MAP[axis(y-1, x)] == 0) newStart.push_back(axis(y-1, x));\n        if (y+1 <= N && v[y+1][x] == '.' && MAP[axis(y+1, x)] == 0) newStart.push_back(axis(y+1, x));\n        if (x-1 >= 0 && v[y][x-1] == '.' && MAP[axis(y, x-1)] == 0) newStart.push_back(axis(y, x-1));\n        if (x+1 <= N && v[y][x+1] == '.' && MAP[axis(y, x+1)] == 0) newStart.push_back(axis(y, x+1));\n    }\n    BFS(newStart, count+1, MAP);\n}\n\nint main() {\n    cin.sync_with_stdio(0);\n    cin.tie(0);\n    cin >> N;\n    for (int i = 0; i<N; i++)\n    {\n        vector<char>tmp;\n        for (int j = 0; j<N; j++)\n        {\n            char a;\n            cin >> a;\n            tmp.push_back(a);\n        }\n        v.push_back(tmp);\n    }\n    N--;\n    map<pair<int, int>, int>MAP;\n    MAP[axis(1, 1)]++;\n    vector<pair<int, int>>tmp;\n    tmp.push_back(axis(1, 1));\n    BFS(tmp, 1, MAP);\n}\n\n\/\/ZeroJudge A982\n\/\/Dr. SeanXD<\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"
\u7d66\u4f60\u4e00\u500b N\uff0aN \u683c\u7684\u8ff7\u5bae\uff0c\u8ff7\u5bae\u4e2d\u4ee5\u300c#\u300d\u4ee3\u8868\u969c\u7919\u7269\uff0c\u4ee5\u300c.\u300d\u4ee3\u8868\u8def\u3002 \u4f60\u56fa\u5b9a\u5728 (2, 2) \u51fa\u767c\uff0c\u6700\u5de6\u4e0a\u89d2 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[6],"tags":[30,14,23,22,8,16,9],"class_list":["post-278","post","type-post","status-publish","format-standard","hentry","category-6","tag-bfs","tag-map","tag-pair","tag-22","tag-8","tag-tle","tag-9"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/posts\/278","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/comments?post=278"}],"version-history":[{"count":2,"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/posts\/278\/revisions"}],"predecessor-version":[{"id":280,"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/posts\/278\/revisions\/280"}],"wp:attachment":[{"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/media?parent=278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/categories?post=278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/seanxd.com\/en\/wp-json\/wp\/v2\/tags?post=278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}