{"id":166,"date":"2010-03-20T01:54:00","date_gmt":"2010-03-19T17:54:00","guid":{"rendered":"http:\/\/localhost\/?p=166"},"modified":"2010-03-20T01:54:00","modified_gmt":"2010-03-19T17:54:00","slug":"vijos1083_white_the_park","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/wjmzbmr\/?p=166","title":{"rendered":"Vijos1083 \u5c0f\u767d\u901b\u516c\u56ed"},"content":{"rendered":"<p> <a href=\"http:\/\/61.187.179.132:8080\/JudgeOnline\/showproblem?problem_id=1756\" target=\"_blank\">61.187.179.132:8080\/JudgeOnline\/showproblem<\/a><\/p>\n<p>Vijos1083 \u5c0f\u767d\u901b\u516c\u56ed\u3000<\/p>\n<p>Time Limit:10000MS&#160; Memory Limit:65536K<br \/>Total Submit:58 Accepted:16 <br \/>Case Time Limit:1000MS<\/p>\n<p><strong>Description <\/strong><\/p>\n<p> \u5c0f\u65b0\u7ecf\u5e38\u966a\u5c0f\u767d\u53bb\u516c\u56ed\u73a9\uff0c\u4e5f\u5c31\u662f\u6240\u8c13\u7684\u905b\u72d7\u5566\u2026\u5728\u5c0f\u65b0\u5bb6\u9644\u8fd1\u6709\u4e00\u6761\u201c\u516c\u56ed\u8def\u201d\uff0c\u8def\u7684\u4e00\u8fb9\u4ece\u5357\u5230\u5317\u4f9d\u6b21\u6392\u7740n\u4e2a\u516c\u56ed\uff0c\u5c0f\u767d\u65e9\u5c31\u770b\u82b1\u4e86\u773c\uff0c\u81ea\u5df1\u4e5f\u4e0d\u6e05\u695a\u8be5\u53bb\u54ea \u4e9b\u516c\u56ed\u73a9\u4e86\u3002  <br \/>\u4e00\u5f00\u59cb\uff0c\u5c0f\u767d\u5c31\u6839\u636e\u516c\u56ed\u7684\u98ce\u666f\u7ed9\u6bcf\u4e2a\u516c\u56ed\u6253\u4e86\u5206-.-\u3002\u5c0f\u65b0\u4e3a\u4e86\u7701\u4e8b\uff0c\u6bcf\u6b21\u905b\u72d7\u7684\u65f6\u5019\u90fd\u4f1a\u4e8b\u5148\u89c4\u5b9a\u4e00\u4e2a\u8303\u56f4\uff0c\u5c0f\u767d\u53ea\u53ef\u4ee5\u9009\u62e9\u7b2ca\u4e2a\u548c\u7b2cb\u4e2a\u516c \u56ed\u4e4b\u95f4\uff08\u5305\u62eca\u3001b\u4e24\u4e2a\u516c\u56ed\uff09\u9009\u62e9\u8fde\u7eed\u7684\u4e00\u4e9b\u516c\u56ed\u73a9\u3002\u5c0f\u767d\u5f53\u7136\u5e0c\u671b\u9009\u51fa\u7684\u516c\u56ed\u7684\u5206\u6570\u603b\u548c\u5c3d\u91cf\u9ad8\u54af\u3002\u540c\u65f6\uff0c\u7531\u4e8e\u4e00\u4e9b\u516c\u56ed\u7684\u666f\u89c2\u4f1a\u6709\u6240\u6539\u53d8\uff0c\u6240\u4ee5\uff0c\u5c0f\u767d\u7684\u6253\u5206 \u4e5f\u53ef\u80fd\u4f1a\u6709\u4e00\u4e9b\u53d8\u5316\u3002  <br \/>\u90a3\u4e48\uff0c\u5c31\u8bf7\u4f60\u6765\u5e2e\u5c0f\u767d\u9009\u62e9\u516c\u56ed\u5427\u3002  <\/p>\n<p><\/p>\n<p><strong>Input <\/strong><\/p>\n<p> \u7b2c\u4e00\u884c\uff0c\u4e24\u4e2a\u6574\u6570N\u548cM\uff0c\u5206\u522b\u8868\u793a\u8868\u793a\u516c\u56ed\u7684\u6570\u91cf\u548c\u64cd\u4f5c\uff08\u905b\u72d7\u6216\u8005\u6539\u53d8\u6253\u5206\uff09\u603b\u6570\u3002  <br \/>\u63a5\u4e0b\u6765N\u884c\uff0c\u6bcf\u884c\u4e00\u4e2a\u6574\u6570\uff0c\u4f9d\u6b21\u7ed9\u51fa\u5c0f\u767d \u5f00\u59cb\u65f6\u5bf9\u516c\u56ed\u7684\u6253\u5206\u3002  <br \/>\u63a5\u4e0b\u6765M\u884c\uff0c\u6bcf\u884c\u4e09\u4e2a\u6574\u6570\u3002\u7b2c\u4e00\u4e2a\u6574\u6570K\uff0c1\u62162\u3002K=1\u8868\u793a\uff0c\u5c0f\u65b0\u8981\u5e26\u5c0f\u767d\u51fa\u53bb\u73a9\uff0c\u63a5\u4e0b\u6765\u7684\u4e24\u4e2a\u6574\u6570a\u548cb\u7ed9\u51fa\u4e86\u9009\u62e9\u516c\u56ed\u7684\u8303\u56f4 \uff081\u2264a,b\u2264N\uff09\uff1bK=2\u8868\u793a\uff0c\u5c0f\u767d\u6539\u53d8\u4e86\u5bf9\u67d0\u4e2a\u516c\u56ed\u7684\u6253\u5206\uff0c\u63a5\u4e0b\u6765\u7684\u4e24\u4e2a\u6574\u6570p\u548cs\uff0c\u8868\u793a\u5c0f\u767d\u5bf9\u7b2cp\u4e2a\u516c\u56ed\u7684\u6253\u5206\u53d8\u6210\u4e86s\uff081\u2264p\u2264N\uff09\u3002  <br \/>\u5176\u4e2d\uff0c1\u2264N\u2264500 000\uff0c1\u2264M\u2264100 000\uff0c\u6240\u6709\u6253\u5206\u90fd\u662f\u7edd\u5bf9\u503c\u4e0d\u8d85\u8fc71000\u7684\u6574\u6570\u3002  <\/p>\n<p><strong>Output <\/strong><\/p>\n<p> \u5c0f\u767d\u6bcf\u51fa\u53bb\u73a9\u4e00\u6b21\uff0c\u90fd\u5bf9\u5e94\u8f93\u51fa\u4e00\u884c\uff0c\u53ea\u5305\u542b\u4e00\u4e2a\u6574\u6570\uff0c\u8868\u793a\u5c0f\u767d\u53ef\u4ee5\u9009\u51fa\u7684\u516c\u56ed\u5f97\u5206\u548c\u7684\u6700\u5927\u503c\u3002  <\/p>\n<p><strong>Sample Input <\/strong><\/p>\n<p>5 3<br \/>1 2 -3 4 5<br \/>1 2 3<br \/>2 2 -1<br \/>1 2 3<\/p>\n<p><strong>Sample Output <\/strong><\/p>\n<p>2<br \/>-1<\/p>\n<p><strong>Source <\/strong><\/p>\n<p>\u8fd9\u662f\u4e00\u9053\u6c34\u9898\u554a\u6c34\u9898\u554a\u3002\u6211\u5b9e\u9a8c\u4e86\u4e00\u4e0b\u6211\u6700\u8fd1\u60f3\u51fa\u6765\u7684\u7ebf\u6bb5\u6811\u65b0\u5199\u6cd5\u3002\u5c31\u662f\u5408\u5e76\u7528\u4e00\u4e2a\u5931\u6548\u503c\u6765\u4ee3\u66ff\u4e0d\u5b58\u5728\u7684\u8282\u70b9\u3002\u3002\u7136\u540e\u4e0d\u662f\u5728\u7236\u8282\u70b9\u5904\u5224\u65ad\u8303\u56f4\uff0c\u800c\u662f\u76f4\u63a5\u5728\u5b50\u8282\u70b9\u5904\u5224\u65ad\u8303\u56f4\uff0c\u5199\u8d77\u6765\u8d85\u723d\uff0c\u4ee3\u7801\u4e5f\u8d85\u77ed\uff0c\u5177\u4f53\u770bCode\u5427\u3002<br \/>Code\uff1a<br \/>#include&lt;cstdio&gt;<br \/>#include&lt;algorithm&gt;<br \/>#define rep(i,n) for(int i=0;i&lt;n;i++)<br \/>using namespace std;<br \/>const int inf=~0U&gt;&gt;1,maxn=500000;<br \/>int A[maxn];<br \/>struct info<br \/>{<br \/>    int L,R,M,S;<br \/>    info(int x=0):L(x),R(x),M(x),S(x){}<br \/>}none;<br \/>info operator+(const info&amp;l,const info&amp;r)<br \/>{<br \/>    info f;if(l.M==-inf)return r;<br \/>    if(r.M==-inf)return l;<br \/>    f.L=max(l.L,l.S+r.L);<br \/>    f.R=max(r.R,r.S+l.R);<br \/>    f.S=l.S+r.S;<br \/>    f.M=max(l.M,r.M);<br \/>    f.M=max(f.M,l.R+r.L);<br \/>    return f;<br \/>}<br \/>info T[maxn*3];<br \/>inline void set(int t,int x)<br \/>{<br \/>    T[t]=info(x);<br \/>}<br \/>void build(int t,int l,int r)<br \/>{<br \/>    if(l+1==r) {set(t,A[l]);return;}<br \/>    build(t*2,l,(l+r)\/2);<br \/>    build(t*2+1,(l+r)\/2,r);<br \/>    T[t]=T[t*2]+T[t*2+1];<br \/>}<br \/>void change(int t,int l,int r,int p,int s)<br \/>{<br \/>    if(l+1==r){set(t,s);return;}<br \/>    if(p&lt;(l+r)\/2) change(t*2,l,(l+r)\/2,p,s);<br \/>    else change(t*2+1,(l+r)\/2,r,p,s);<br \/>    T[t]=T[t*2]+T[t*2+1];<br \/>}<br \/>info ask(int t,int l,int r,int a,int b)<br \/>{<br \/>    if(b&lt;=l||a&gt;=r) return none;<br \/>    if(l&gt;=a&amp;&amp;r&lt;=b) return T[t];<br \/>    return ask(t*2,l,(l+r)\/2,a,b)+ask(t*2+1,(l+r)\/2,r,a,b);<br \/>}<br \/>int main()<br \/>{<br \/>    \/\/freopen(&quot;in&quot;,&quot;r&quot;,stdin);<br \/>    none.M=-inf;<br \/>    int n,m,a,b,c;scanf(&quot;%d %d&quot;,&amp;n,&amp;m);<br \/>    rep(i,n)scanf(&quot;%d&quot;,A+i);<br \/>    build(1,0,n);<br \/>    while(m&#8211;)<br \/>    {<br \/>        scanf(&quot;%d %d %d&quot;,&amp;a,&amp;b,&amp;c);<br \/>        if(a==1) {if(b&gt;c)swap(b,c);printf(&quot;%dn&quot;,ask(1,0,n,b-1,c).M);}<br \/>        else change(1,0,n,b-1,c);<br \/>    }<br \/>} <\/p>\n","protected":false},"excerpt":{"rendered":"<p>61.187.179.132:8080\/JudgeOnline\/showproblem Vijos1083 \u5c0f\u767d\u901b\u516c\u56ed\u3000 Time Limit:10000MS&#160; Memory Limit:65536KTotal Submit:58 Accepted:16 Case Time Limit:1000MS Description \u5c0f\u65b0\u7ecf\u5e38\u966a\u5c0f\u767d\u53bb\u516c\u56ed\u73a9\uff0c\u4e5f\u5c31\u662f\u6240\u8c13\u7684\u905b\u72d7\u5566\u2026\u5728\u5c0f\u65b0\u5bb6\u9644\u8fd1\u6709\u4e00\u6761\u201c\u516c\u56ed\u8def\u201d\uff0c\u8def\u7684\u4e00\u8fb9\u4ece\u5357\u5230\u5317\u4f9d\u6b21\u6392\u7740n\u4e2a\u516c\u56ed\uff0c\u5c0f\u767d\u65e9\u5c31\u770b\u82b1\u4e86\u773c\uff0c\u81ea\u5df1\u4e5f\u4e0d\u6e05\u695a\u8be5\u53bb\u54ea \u4e9b\u516c\u56ed\u73a9\u4e86\u3002 \u4e00\u5f00\u59cb\uff0c\u5c0f\u767d\u5c31\u6839\u636e\u516c\u56ed\u7684\u98ce\u666f\u7ed9\u6bcf\u4e2a\u516c\u56ed\u6253\u4e86\u5206-.-\u3002\u5c0f\u65b0\u4e3a\u4e86\u7701\u4e8b\uff0c\u6bcf\u6b21\u905b\u72d7\u7684\u65f6\u5019\u90fd\u4f1a\u4e8b\u5148\u89c4\u5b9a\u4e00\u4e2a\u8303\u56f4\uff0c\u5c0f\u767d\u53ea\u53ef\u4ee5\u9009\u62e9\u7b2ca\u4e2a\u548c\u7b2cb\u4e2a\u516c \u56ed\u4e4b\u95f4\uff08\u5305\u62eca\u3001b\u4e24\u4e2a\u516c\u56ed\uff09\u9009\u62e9\u8fde\u7eed\u7684\u4e00\u4e9b\u516c\u56ed\u73a9\u3002\u5c0f\u767d\u5f53\u7136\u5e0c\u671b\u9009\u51fa\u7684\u516c\u56ed\u7684\u5206\u6570\u603b\u548c\u5c3d\u91cf\u9ad8\u54af\u3002\u540c\u65f6\uff0c\u7531\u4e8e\u4e00\u4e9b\u516c\u56ed\u7684\u666f\u89c2\u4f1a\u6709\u6240\u6539\u53d8\uff0c\u6240\u4ee5\uff0c\u5c0f\u767d\u7684\u6253\u5206 \u4e5f\u53ef\u80fd\u4f1a\u6709\u4e00\u4e9b\u53d8\u5316\u3002 \u90a3\u4e48\uff0c\u5c31\u8bf7\u4f60\u6765\u5e2e\u5c0f\u767d\u9009\u62e9\u516c\u56ed\u5427\u3002 Input \u7b2c\u4e00\u884c\uff0c\u4e24\u4e2a\u6574\u6570N\u548cM\uff0c\u5206\u522b\u8868\u793a\u8868\u793a\u516c\u56ed\u7684\u6570\u91cf\u548c\u64cd\u4f5c\uff08\u905b\u72d7\u6216\u8005\u6539\u53d8\u6253\u5206\uff09\u603b\u6570\u3002 \u63a5\u4e0b\u6765N\u884c\uff0c\u6bcf\u884c\u4e00\u4e2a\u6574\u6570\uff0c\u4f9d\u6b21\u7ed9\u51fa\u5c0f\u767d \u5f00\u59cb\u65f6\u5bf9\u516c\u56ed\u7684\u6253\u5206\u3002 \u63a5\u4e0b\u6765M\u884c\uff0c\u6bcf\u884c\u4e09\u4e2a\u6574\u6570\u3002\u7b2c\u4e00\u4e2a\u6574\u6570K\uff0c1\u62162\u3002K=1\u8868\u793a\uff0c\u5c0f\u65b0\u8981\u5e26\u5c0f\u767d\u51fa\u53bb\u73a9\uff0c\u63a5\u4e0b\u6765\u7684\u4e24\u4e2a\u6574\u6570a\u548cb\u7ed9\u51fa\u4e86\u9009\u62e9\u516c\u56ed\u7684\u8303\u56f4 \uff081\u2264a,b\u2264N\uff09\uff1bK=2\u8868\u793a\uff0c\u5c0f\u767d\u6539\u53d8\u4e86\u5bf9\u67d0\u4e2a\u516c\u56ed\u7684\u6253\u5206\uff0c\u63a5\u4e0b\u6765\u7684\u4e24\u4e2a\u6574\u6570p\u548cs\uff0c\u8868\u793a\u5c0f\u767d\u5bf9\u7b2cp\u4e2a\u516c\u56ed\u7684\u6253\u5206\u53d8\u6210\u4e86s\uff081\u2264p\u2264N\uff09\u3002 \u5176\u4e2d\uff0c1\u2264N\u2264500 000\uff0c1\u2264M\u2264100 000\uff0c\u6240\u6709\u6253\u5206\u90fd\u662f\u7edd\u5bf9\u503c\u4e0d\u8d85\u8fc71000\u7684\u6574\u6570\u3002 Output \u5c0f\u767d\u6bcf\u51fa\u53bb\u73a9\u4e00\u6b21\uff0c\u90fd\u5bf9\u5e94\u8f93\u51fa\u4e00\u884c\uff0c\u53ea\u5305\u542b\u4e00\u4e2a\u6574\u6570\uff0c\u8868\u793a\u5c0f\u767d\u53ef\u4ee5\u9009\u51fa\u7684\u516c\u56ed\u5f97\u5206\u548c\u7684\u6700\u5927\u503c\u3002 Sample Input 5 31 2 -3 4 51 2 32 2 -11 2 3 Sample Output 2-1 Source \u8fd9\u662f\u4e00\u9053\u6c34\u9898\u554a\u6c34\u9898\u554a\u3002\u6211\u5b9e\u9a8c\u4e86\u4e00\u4e0b\u6211\u6700\u8fd1\u60f3\u51fa\u6765\u7684\u7ebf\u6bb5\u6811\u65b0\u5199\u6cd5\u3002\u5c31\u662f\u5408\u5e76\u7528\u4e00\u4e2a\u5931\u6548\u503c\u6765\u4ee3\u66ff\u4e0d\u5b58\u5728\u7684\u8282\u70b9\u3002\u3002\u7136\u540e\u4e0d\u662f\u5728\u7236\u8282\u70b9\u5904\u5224\u65ad\u8303\u56f4\uff0c\u800c\u662f\u76f4\u63a5\u5728\u5b50\u8282\u70b9\u5904\u5224\u65ad\u8303\u56f4\uff0c\u5199\u8d77\u6765\u8d85\u723d\uff0c\u4ee3\u7801\u4e5f\u8d85\u77ed\uff0c\u5177\u4f53\u770bCode\u5427\u3002Code\uff1a#include&lt;cstdio&gt;#include&lt;algorithm&gt;#define rep(i,n) for(int i=0;i&lt;n;i++)using namespace std;const int [&hellip;]<\/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\/166"}],"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=166"}],"version-history":[{"count":0,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/166\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}