{"id":26,"date":"2022-06-04T10:52:00","date_gmt":"2022-06-04T02:52:00","guid":{"rendered":"http:\/\/ubuntu.tim-wcx.ltd\/wordpress\/index.php\/2022\/06\/04\/2020-08-19\/"},"modified":"2022-06-04T10:52:00","modified_gmt":"2022-06-04T02:52:00","slug":"2020-08-19","status":"publish","type":"post","link":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/2022\/06\/04\/2020-08-19\/","title":{"rendered":"2020-08-19"},"content":{"rendered":"

\n <\/path>\n <\/svg><\/p>\n

http:\/\/icpc.upc.edu.cn\/problem.php?cid=2550&pid=6<\/a><\/p>\n

<\/a>\u9898\u76ee\u63cf\u8ff0<\/h5>\n

Rainy7 \u4e00\u5929\u9192\u6765\uff0c\u53d1\u73b0\u81ea\u5df1\u8fdb\u5165\u4e86\u9b54\u6cd5\u4e16\u754c\u3002<\/p>\n

\u4e00\u9053\u5927\u95e8\u77d7\u7acb\u5728 Rainy7 \u9762\u524d\uff0c\u4f3c\u4e4e\u9700\u8981\u5bc6\u7801\u89e3\u9501\u3002<\/p>\n

Rainy7 \u7ecf\u8fc7\u4e00\u756a\u67e5\u627e\u540e\uff0c\u627e\u5230\u4e86\u5bc6\u7801\u5bf9\u5e94\u7684\u95ee\u9898\uff1a\u5728n\u00d7m\u7684\u68cb\u76d8\u4e0a\u6446\u653e\u4e24\u4e2a\u4e0d\u540c\u989c\u8272\u7684\u7687\u540e\uff0c\u4f7f\u5f97\u5b83\u4eec\u80fd\u591f\u76f8\u4e92\u653b\u51fb\uff0c\u603b\u5171\u6709\u591a\u5c11\u79cd\u6446\u6cd5\uff1f<\/p>\n

\u6211\u4eec\u79f0\u4e24\u4e2a\u7687\u540e\u80fd\u591f\u76f8\u4e92\u653b\u51fb\uff0c\u5f53\u4e14\u4ec5\u5f53\u5b83\u4eec\u5728\u540c\u4e00\u884c\u6216\u540c\u4e00\u5217\u6216\u540c\u4e00\u659c\u7ebf\u4e0a\u3002<\/p>\n

\u5979\u53ea\u7528\u4e86114514-1919810 s\u5c31\u89e3\u51b3\u4e86\u95ee\u9898\u5e76\u6253\u5f00\u4e86\u5927\u95e8\uff0c\u4e8e\u662f\u628a\u95ee\u9898\u4ea4\u7ed9\u4e86\u60a8\u3002<\/p>\n

<\/a>\u8f93\u5165<\/h5>\n

\u7b2c\u4e00\u884c\u4e00\u4e2a\u6574\u6570t\uff0c\u8868\u793a\u6570\u636e\u7ec4\u6570\u3002
\u63a5\u4e0b\u6765t\u884c\uff0c\u6bcf\u884c\u4e24\u4e2a\u6b63\u6574\u6570n,m\uff0c\u8868\u793a\u68cb\u76d8\u7684\u957f\u548c\u5bbd\u3002<\/p>\n

<\/a>\u8f93\u51fa<\/h5>\n

t\u884c\uff0c\u6bcf\u884c\u4e00\u4e2a\u6570\uff0c\u8868\u793a\u65b9\u6848\u6570\u3002
\u7531\u4e8e\u8fd9\u4e2a\u6570\u53ef\u80fd\u5f88\u5927\uff0c\u60a8\u53ea\u8981\u8f93\u51fa\u5b83\u5bf9109+7\u53d6\u6a21\u7684\u7ed3\u679c\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n

<\/a>\u6837\u4f8b\u8f93\u5165<\/h5>\n

\u3010\u6837\u4f8b1\u3011
1
2 2
\u3010\u6837\u4f8b2\u3011
1
114514 114514
\u3010\u6837\u4f8b3\u3011
2
165528 123456
132435 423153<\/p>\n

<\/a>\u6837\u4f8b\u8f93\u51fa<\/h5>\n

\u3010\u6837\u4f8b1\u3011
12
\u3010\u6837\u4f8b2\u3011
587308676
\u3010\u6837\u4f8b3\u3011
718509545
475373430<\/p>\n

<\/a>\u63d0\u793a<\/h5>\n

\u6837\u4f8b1\u89e3\u91ca
\u5982\u56fe\u6240\u793a\uff1a<\/p>\n

\u5bf9\u4e8e20%\u7684\u6570\u636e\uff0c1\u2264n,m\u226450,1\u2264t\u226410
\u5bf9\u4e8e50%\u7684\u6570\u636e\uff0c1\u2264n,m\u2264300
\u5bf9\u4e8e70%\u7684\u6570\u636e\uff0c1\u2264n,m\u22645000
\u5bf9\u4e8e100%\u7684\u6570\u636e\uff0c1\u2264n,m\u22645\u00d7105,1\u2264t\u22645000
\u672c\u9898\u90e8\u5206\u6570\u636e\u5361\u5e38\uff0c\u8bf7\u6ce8\u610f\u5e38\u6570\u4f18\u5316<\/p>\n

<\/a>\u89e3\u6790<\/h5>\n

\u8fd9\u9053\u9898\u76ee\u53ef\u4ee5\u5206\u4e3a\u4e09\u79cd\u60c5\u51b5\u6765\u8ba8\u8bba\uff0c\u6a2a\u7ad6\u548c\u5bf9\u89d2\u7ebf\uff0c\u6a2a\u548c\u7ad6\u90fd\u6bd4\u8f83\u7b80\u5355\uff0c\u7ed3\u679c\u4e3anm<\/em>(n+m-2)\uff0c\u5bf9\u89d2\u7ebf\u4e0a\u63a8\u5230\u89c1\u4e0b\u56fe\uff1a
\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

#pragma<\/span> GCC optimize(1)<\/span>\n#pragma<\/span> GCC optimize(2)<\/span>\n#pragma<\/span> GCC optimize(3,\"Ofast\",\"inline\")<\/span>\n#include<\/span> <\/span><\/span>\nusing<\/span> namespace<\/span> std;<\/span>\ntypedef<\/span> long<\/span> long<\/span> ll;<\/span>\nconst<\/span> int<\/span> mod=<\/span>1e9<\/span>+<\/span>7<\/span>;<\/span>\nll n,<\/span>m;<\/span>\nll mul<\/span>(<\/span>ll a,<\/span>ll b)<\/span>\n{<\/span>\n    ll sum1=<\/span>0<\/span>;<\/span>\n    ll sum2=<\/span>a;<\/span>\n    while<\/span>(<\/span>b!=<\/span>0<\/span>)<\/span>\n    {<\/span>\n        if<\/span>(<\/span>b%<\/span>2<\/span>==<\/span>1<\/span>)<\/span>\n            sum1=<\/span>(<\/span>sum1+<\/span>sum2)<\/span>%<\/span>mod;<\/span>\n        sum2=<\/span>(<\/span>sum2+<\/span>sum2)<\/span>%<\/span>mod;<\/span>\n        b=<\/span>b\/<\/span>2<\/span>;<\/span>\n    }<\/span>\n    return<\/span> sum1;<\/span>\n}<\/span>\nint<\/span> main<\/span>(<\/span>)<\/span>\n{<\/span>\n    ll t;<\/span>\n    scanf<\/span>(<\/span>\"%lld\"<\/span>,<\/span>&<\/span>t)<\/span>;<\/span>\n    while<\/span>(<\/span>t--<\/span>)<\/span>\n    {<\/span>\n        ll ans=<\/span>0<\/span>;<\/span>\n        scanf<\/span>(<\/span>\"%lld%lld\"<\/span>,<\/span>&<\/span>n,<\/span>&<\/span>m)<\/span>;<\/span>\n        if<\/span>(<\/span>n><\/span>m)<\/span>\n            swap<\/span>(<\/span>n,<\/span>m)<\/span>;<\/span>\n        ans+<\/span>=<\/span>mul<\/span>(<\/span>n*<\/span>m,<\/span>n+<\/span>m-<\/span>2<\/span>)<\/span>;<\/span>\n        ll k1=<\/span>n*<\/span>(<\/span>n-<\/span>1<\/span>)<\/span>*<\/span>2<\/span>;<\/span>\n        ll k2=<\/span>3<\/span>*<\/span>m-<\/span>n-<\/span>1<\/span>;<\/span>\n        if<\/span>(<\/span>k1%<\/span>3<\/span>==<\/span>0<\/span>)<\/span>\n            k1=<\/span>k1\/<\/span>3<\/span>;<\/span>\n        else<\/span> if<\/span>(<\/span>k2%<\/span>3<\/span>==<\/span>0<\/span>)<\/span>\n            k2=<\/span>k2\/<\/span>3<\/span>;<\/span>\n        ans+<\/span>=<\/span>mul<\/span>(<\/span>k1,<\/span>k2)<\/span>;<\/span>\n        printf<\/span>(<\/span>\"%lldn\"<\/span>,<\/span>ans%<\/span>mod)<\/span>;<\/span>\n    }<\/span>\n    return<\/span> 0<\/span>;<\/span>\n}<\/span>\n\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
http:\/\/icpc.upc.edu.cn\/pr…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-26","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/posts\/26","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/comments?post=26"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/posts\/26\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/media?parent=26"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/categories?post=26"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.tim-wcx.ltd\/index.php\/wp-json\/wp\/v2\/tags?post=26"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}