vis\u7684\u76ee\u7684\u5176\u5b9e\u5e76\u4e0d\u662f\u5df2\u7ecf\u8bbf\u95ee\u8fc7\u54ea\u4e9b\u8282\u70b9\uff0c\u800c\u662f\u8bb0\u5f55\u3010[\u5728\u5f53\u524d\u6b65\u9aa4] \u6216 [\u4e4b\u524d\u7684\u6b65\u9aa4]\u3011\u4e2d\u5df2\u7ecf\u8bbf\u95ee\u8fc7\u7684\u72b6\u6001\u3002\u56e0\u4e3a\u4e4b\u524d\u5df2\u7ecf\u8bbf\u95ee\u8fc7\u4e86\u8fd9\u4e9b\u72b6\u6001\uff0c\u800c\u4e4b\u524d\u90a3\u4e9b\u8bbf\u95ee\u7528\u7684\u6b65\u9aa4\u66f4\u5c11\uff0c\u56e0\u6b64\u4e4b\u540e\u5c31\u6ca1\u5fc5\u8981\u518d\u6b21\u8bbf\u95ee\u8fd9\u4e9b\u72b6\u6001\u4e86\u3002<\/p>\n\n\n\n
\u5f53\u7528bfs\u7528\u4e8e\u8bb0\u5f55\u5230\u8fbe\u67d0\u4e2a\u72b6\u6001\u7684\u6b65\u9aa4\u65f6\uff0c\u5219\u82e5\u67d0\u4e2a\u8282\u70b9 \u3010\u66fe\u7ecf\u8bbf\u95ee\u8fc7\u3011\u6216\u3010\u901a\u6b65\u9aa4\u7684\u5176\u4ed6\u72b6\u6001\u5df2\u7ecf\u5c06\u8fd9\u4e2a\u8282\u70b9\u52a0\u5165\u961f\u5217\u3011\uff0c\u5219\u4e0d\u7528\u518d\u5c06\u8fd9\u4e2a\u8282\u70b9\u52a0\u5165\u961f\u5217\uff1a<\/p>\n\n\n\n
while (!sourceq.empty()) {\n level_count = sourceq.size();\n while ((level_count--) > 0) {\n auto p = sourceq.front();\n sourceq.pop(); \n for (int i=0; i<4; i++) {\n int subx = p.first + dx[i];\n int suby = p.second + dy[i];\n if (subx >= 0 && suby >= 0 && subx < m && suby < n) {\n if (A[subx][suby] == 1) {\n return step;\n } else if (A[subx][suby] == 0 && vis2[subx][suby] == 0){\n sourceq.push({subx,suby});\n vis2[subx][suby]=1;\n }\n }\n }\n }<\/code><\/pre>\n\n\n\n\u6216\u8005\uff1a<\/p>\n\n\n\n
while (!sourceq.empty()) {\n level_count = sourceq.size();\n while ((level_count--) > 0) {\n auto p = sourceq.front();\n sourceq.pop();\n if (vis2[p.first][p.second] == 1) {\n continue;\n }\n vis2[p.first][p.second] = 1;\n for (int i=0; i<4; i++) {\n int subx = p.first + dx[i];\n int suby = p.second + dy[i];\n if (subx >= 0 && suby >= 0 && subx < m && suby < n) {\n if (A[subx][suby] == 1) {\n return step;\n } else if (A[subx][suby] == 0){\n sourceq.push({subx,suby});\n }\n }\n }\n }\n step++;\n }<\/code><\/pre>\n\n\n\n\u4f46\u4e0d\u80fd\u8fd9\u6837\uff1a<\/p>\n\n\n\n
while (!sourceq.empty()) {\n level_count = sourceq.size();\n while ((level_count--) > 0) {\n auto p = sourceq.front();\n sourceq.pop();\n \/\/ 1:\n if (vis2[p.first][p.second] == 1) {\n continue;\n }\n vis2[p.first][p.second] = 1;\n for (int i=0; i<4; i++) {\n int subx = p.first + dx[i];\n int suby = p.second + dy[i];\n if (subx >= 0 && suby >= 0 && subx < m && suby < n) {\n if (A[subx][suby] == 1) {\n return step;\n } else if (A[subx][suby] == 0 && vis2[subx][suby] == 0){\n \/\/ 2:\n sourceq.push({subx,suby});\n vis2[subx][suby]=1;\n }\n }\n }\n }<\/code><\/pre>\n\n\n\n\u8fd9\u6837\u505a\u7684\u8bdd\uff0c\u56e0\u4e3a2\u5904\u5df2\u7ecf\u5c06vis2[subx][suby]\u8bbe\u7f6e\u4e3a1\uff0c\u5219\u8bbf\u95ee\u8fd9\u4e2a\u8282\u70b9\u65f6\uff0c\u56e0\u4e3a1\u5904\u4ee3\u7801\u7684\u5b58\u5728\uff0c\u4f1a\u76f4\u63a5\u8df3\u8fc7\u8bbf\u95ee\u8fd9\u4e2a\u8282\u70b9\u3002<\/p>\n\n\n\n
\u53e6\u5916\uff0c\u82e5\u6709\u591a\u4e2a\u8d77\u59cb\u72b6\u6001\u7684bfs\u51fa\u73b0\u4e86tle\uff0c\u53ef\u80fd\u7684\u539f\u56e0\u662f\uff1a\u961f\u5217\u4e2d\u7684\u8d77\u59cb\u72b6\u6001\u6709\u91cd\u590d\u7684\uff0c\u4e0d\u59a8\u8bd5\u8bd5\u6ca1\u6709\u91cd\u590d\u65f6\u53ef\u4e0d\u53ef\u4ee5\u5ea6\u8fc7\u96be\u5173\u3002\u505aleetcode::934::\u6700\u77ed\u7684\u6865\u65f6\u5c31\u56e0\u4e3a\u8fd9\u79cd\u539f\u56e0tle\u4e86<\/p>\n","protected":false},"excerpt":{"rendered":"
vis\u7684\u76ee\u7684\u5176\u5b9e\u5e76\u4e0d\u662f\u5df2\u7ecf\u8bbf\u95ee\u8fc7\u54ea\u4e9b\u8282\u70b9\uff0c\u800c\u662f\u8bb0\u5f55\u3010[\u5728\u5f53\u524d\u6b65\u9aa4] \u6216 [\u4e4b\u524d\u7684\u6b65\u9aa4]\u3011\u4e2d\u5df2\u7ecf\u8bbf\u95ee\u8fc7\u7684\u72b6\u6001\u3002\u56e0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73,36],"tags":[],"class_list":["post-1615","post","type-post","status-publish","format-standard","hentry","category-73","category-36"],"_links":{"self":[{"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=\/wp\/v2\/posts\/1615","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1615"}],"version-history":[{"count":6,"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=\/wp\/v2\/posts\/1615\/revisions"}],"predecessor-version":[{"id":1691,"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=\/wp\/v2\/posts\/1615\/revisions\/1691"}],"wp:attachment":[{"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bloo.heing.fun\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}