{"id":387,"date":"2010-10-02T23:04:00","date_gmt":"2010-10-02T15:04:00","guid":{"rendered":"http:\/\/localhost\/?p=387"},"modified":"2010-10-02T23:04:00","modified_gmt":"2010-10-02T15:04:00","slug":"zjoi2008_watchtower","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/wjmzbmr\/?p=387","title":{"rendered":"[ZJOI2008]\u77ad\u671b\u5854"},"content":{"rendered":"\n

[ZJOI2008]\u77ad\u671b\u5854<\/p>\n

Time Limit:10000MS  Memory Limit:165536K
Total Submit:39 Accepted:22
Case Time Limit:2000MS<\/p>\n

Description <\/strong><\/p>\n

\u81f4\u529b\u4e8e\u5efa\u8bbe\u5168\u56fd\u793a\u8303\u548c\u8c10\u5c0f\u6751\u5e84\u7684H\u6751\u6751\u957fdadzhi\uff0c\u51b3\u5b9a\u5728\u6751\u4e2d\u5efa\u7acb\u4e00\u4e2a\u77ad\u671b\u5854\uff0c\u4ee5\u6b64\u52a0\u5f3a\u6751\u4e2d\u7684\u6cbb\u5b89\u3002
\u6211\u4eec\u5c06H\u6751\u62bd\u8c61\u4e3a\u4e00\u7ef4\u7684\u8f6e\u5ed3\u3002\u5982\u4e0b\u56fe\u6240\u793a <\/p>\n

\u6211\u4eec\u53ef\u4ee5\u7528\u4e00\u6761\u5c71\u7684\u4e0a\u65b9\u8f6e\u5ed3\u6298\u7ebf(x1, y1), (x2, y2), \u2026. (xn, yn)\u6765\u63cf\u8ff0H\u6751\u7684\u5f62\u72b6\uff0c\u8fd9\u91ccx1 < x2 < \u2026< xn\u3002\u77ad\u671b\u5854\u53ef\u4ee5\u5efa\u9020\u5728[x1, xn]\u95f4\u7684\u4efb\u610f\u4f4d\u7f6e, \u4f46\u5fc5\u987b\u6ee1\u8db3\u4ece\u77ad\u671b\u5854\u7684\u9876\u7aef\u53ef\u4ee5\u770b\u5230H\u6751\u7684\u4efb\u610f\u4f4d\u7f6e\u3002\u53ef\u89c1\u5728\u4e0d\u540c\u7684\u4f4d\u7f6e\u5efa\u9020\u77ad\u671b\u5854\uff0c\u6240\u9700\u8981\u5efa\u9020\u7684\u9ad8\u5ea6\u662f\u4e0d\u540c\u7684\u3002\u4e3a\u4e86\u8282\u7701\u5f00\u652f\uff0cdadzhi\u6751\u957f\u5e0c\u671b\u5efa\u9020\u7684\u5854 \u9ad8\u5ea6\u5c3d\u53ef\u80fd\u5c0f\u3002
\u8bf7\u4f60\u5199\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u5e2e\u52a9dadzhi\u6751\u957f\u8ba1\u7b97\u5854\u7684\u6700\u5c0f\u9ad8\u5ea6\u3002 <\/p>\n

Input <\/strong><\/p>\n

\u7b2c\u4e00\u884c\u5305\u542b\u4e00\u4e2a\u6574\u6570n\uff0c\u8868\u793a\u8f6e\u5ed3\u6298\u7ebf\u7684\u8282\u70b9\u6570\u76ee\u3002\u63a5\u4e0b\u6765\u7b2c\u4e00\u884cn\u4e2a\u6574\u6570, \u4e3ax1 ~ xn. \u7b2c\u4e09\u884cn\u4e2a\u6574\u6570\uff0c\u4e3ay1 ~ yn\u3002 <\/p>\n

Output <\/strong><\/p>\n

\u4ec5\u5305\u542b\u4e00\u4e2a\u5b9e\u6570\uff0c\u4e3a\u5854\u7684\u6700\u5c0f\u9ad8\u5ea6\uff0c\u7cbe\u786e\u5230\u5c0f\u6570\u70b9\u540e\u4e09\u4f4d\u3002 <\/p>\n

Sample Input <\/strong><\/p>\n

\u3010\u8f93\u5165\u6837\u4f8b\u4e00\u3011
6
1 2 4 5 6 7
1 2 2 4 2 1
\u3010\u8f93\u5165\u6837\u4f8b\u4e8c\u3011
4
10 20 49 59
0 10 10 0<\/p>\n

Sample Output <\/strong><\/p>\n

\u3010\u8f93\u51fa\u6837\u4f8b\u4e00\u3011
1.000<\/p>\n

\u3010\u8f93\u51fa\u6837\u4f8b\u4e8c\u3011
14.500
\u3010\u6570\u636e\u89c4\u6a21\u3011
\u5bf9\u4e8e60%\u7684\u6570\u636e\uff0c N \u2264 60\uff1b
\u5bf9\u4e8e100%\u7684\u6570\u636e\uff0c N \u2264 300\uff0c\u8f93\u5165\u5750\u6807\u7edd\u5bf9\u503c\u4e0d\u8d85\u8fc7106\uff0c\u6ce8\u610f\u8003\u8651\u5b9e\u6570\u8bef\u5dee\u5e26\u6765\u7684\u95ee\u9898\u3002<\/p>\n

Source
\u3002\u3002\u8fd9\u3002\u3002\u88f8\u7684\u534a\u5e73\u9762\u4ea4\u554aT_T\u3002\u3002
\u4e0d\u8fc7\u56e0\u4e3a\u4e00\u4e2a\u5f88SB\u7684\u539f\u56e0\u3002\u3002WA\u4e86N\u6b21\u3002\u3002
\u4e00\u822c\u6211\u8bbe\u65e0\u7a77\u5927\u90fd\u662f\u7528~0U>>1..
\u4f46\u8fd9\u4e2a\u5728double\u4e0a\u5c31\u4e0d\u591f\u5927\u4e86\u3002\u3002
\u56e7\u554a\u3002\u3002\u3002\u3002
\u7b97\u51fa\u80fd\u770b\u5230\u6240\u6709\u70b9\u7684\u96c6\u5408\u7136\u540e\u626b\u63cf\u4e00\u904d\u5c31\u53ef\u4ee5\u4e86\u3002\u3002
<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

[ZJOI2008]\u77ad\u671b\u5854 Time Limit:10000MS  Memory Limit:165536KTotal Submit:39 Accepted:22 Case Time Limit:2000MS Description \u81f4\u529b\u4e8e\u5efa\u8bbe\u5168\u56fd\u793a\u8303\u548c\u8c10\u5c0f\u6751\u5e84\u7684H\u6751\u6751\u957fdadzhi\uff0c\u51b3\u5b9a\u5728\u6751\u4e2d\u5efa\u7acb\u4e00\u4e2a\u77ad\u671b\u5854\uff0c\u4ee5\u6b64\u52a0\u5f3a\u6751\u4e2d\u7684\u6cbb\u5b89\u3002 \u6211\u4eec\u5c06H\u6751\u62bd\u8c61\u4e3a\u4e00\u7ef4\u7684\u8f6e\u5ed3\u3002\u5982\u4e0b\u56fe\u6240\u793a \u6211\u4eec\u53ef\u4ee5\u7528\u4e00\u6761\u5c71\u7684\u4e0a\u65b9\u8f6e\u5ed3\u6298\u7ebf(x1, y1), (x2, y2), \u2026. (xn, yn)\u6765\u63cf\u8ff0H\u6751\u7684\u5f62\u72b6\uff0c\u8fd9\u91ccx1 < x2 < \u2026< xn\u3002\u77ad\u671b\u5854\u53ef\u4ee5\u5efa\u9020\u5728[x1, xn]\u95f4\u7684\u4efb\u610f\u4f4d\u7f6e, \u4f46\u5fc5\u987b\u6ee1\u8db3\u4ece\u77ad\u671b\u5854\u7684\u9876\u7aef\u53ef\u4ee5\u770b\u5230H\u6751\u7684\u4efb\u610f\u4f4d\u7f6e\u3002\u53ef\u89c1\u5728\u4e0d\u540c\u7684\u4f4d\u7f6e\u5efa\u9020\u77ad\u671b\u5854\uff0c\u6240\u9700\u8981\u5efa\u9020\u7684\u9ad8\u5ea6\u662f\u4e0d\u540c\u7684\u3002\u4e3a\u4e86\u8282\u7701\u5f00\u652f\uff0cdadzhi\u6751\u957f\u5e0c\u671b\u5efa\u9020\u7684\u5854 \u9ad8\u5ea6\u5c3d\u53ef\u80fd\u5c0f\u3002 \u8bf7\u4f60\u5199\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u5e2e\u52a9dadzhi\u6751\u957f\u8ba1\u7b97\u5854\u7684\u6700\u5c0f\u9ad8\u5ea6\u3002 Input \u7b2c\u4e00\u884c\u5305\u542b\u4e00\u4e2a\u6574\u6570n\uff0c\u8868\u793a\u8f6e\u5ed3\u6298\u7ebf\u7684\u8282\u70b9\u6570\u76ee\u3002\u63a5\u4e0b\u6765\u7b2c\u4e00\u884cn\u4e2a\u6574\u6570, \u4e3ax1 ~ xn. \u7b2c\u4e09\u884cn\u4e2a\u6574\u6570\uff0c\u4e3ay1 ~ yn\u3002 Output \u4ec5\u5305\u542b\u4e00\u4e2a\u5b9e\u6570\uff0c\u4e3a\u5854\u7684\u6700\u5c0f\u9ad8\u5ea6\uff0c\u7cbe\u786e\u5230\u5c0f\u6570\u70b9\u540e\u4e09\u4f4d\u3002 Sample Input \u3010\u8f93\u5165\u6837\u4f8b\u4e00\u301161 2 4 5 6 71 2 2 4 2 1\u3010\u8f93\u5165\u6837\u4f8b\u4e8c\u3011410 20 49 590 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/387"}],"collection":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=387"}],"version-history":[{"count":0,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/387\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}