int lowbit(int x)\n{\n return x&-x;\n}\n\nint ask(int k) \/\/\u533a\u95f4\u67e5\u8be2\n{\n int res=0;\n for(int i=k;i;i-=lowbit(i))\n res+=c[i];\n return res;\n}\n\nvoid add(int k,int num) \/\/ \u5355\u70b9\u4fee\u6539\n{\n for(int i=k;i<=n;i+=lowbit(i))\n c[i]+=num;\n}<\/code><\/pre>\n\n\n\n\u53ef\u4ee5\u7528\u524d\u7f00\u548c\u5dee\u5206\u7684\u601d\u60f3\u6539\u4e3a\u533a\u95f4\u4fee\u6539\u548c\u5355\u70b9\u67e5\u8be2<\/p>\n\n\n\n
\u7ebf\u6bb5\u6811<\/h2>\n\n\n\n
1. \u7b80\u5355\u7248\u672c \uff08\u65e0pushdown\uff0c\u61d2\u6807\u8bb0\uff09<\/p>\n\n\n\n
\u533a\u95f4\u67e5\u8be2\uff0c\u5355\u70b9\u4fee\u6539\u3002\u5c5e\u6027\uff1a\u533a\u95f4\u6700\u5927\u503c<\/p>\n\n\n\n
struct Node\r\n{\r\n int l, r;\r\n int v;\r\n}tr[N*4];\r\n\r\nvoid build(int u, int l, int r)\r\n{\r\n tr[u]={l, r};\r\n if(l==r) return;\r\n int mid=l+r>>1;\r\n build(u<<1, l, mid), build(u<<1|1, mid+1, r);\r\n}\r\n\r\nvoid pushup(int u)\r\n{\r\n tr[u].v=max(tr[u<<1].v, tr[u<<1|1].v);\r\n}\r\n\r\nvoid modify(int u, int k, int t)\r\n{\r\n if(tr[u].l==k && tr[u].r==k) \r\n {\r\n tr[u].v=t;\r\n return;\r\n }\r\n int mid=tr[u].l+tr[u].r>>1;\r\n if(k<=mid) modify(u<<1, k, t);\r\n else modify(u<<1|1, k, t);\r\n pushup(u);\r\n}\r\n\r\n\r\nint query(int u, int l, int r)\r\n{\r\n if(tr[u].l>=l && tr[u].r<=r) return tr[u].v;\r\n int mid=tr[u].l+tr[u].r>>1;\r\n int res=0;\r\n if(l<=mid) res=query(u<<1, l, r);\r\n if(r>mid) res=max(res, query(u<<1|1, l, r));\r\n return res;\r\n}<\/code><\/pre>\n\n\n\nLCA\u6700\u8fd1\u516c\u5171\u7956\u5148<\/h2>\n\n\n\n
<\/p>\n\n\n\n
<\/p>\n\n\n\n
\u6709\u5411\u56fe\u7684\u5f3a\u8fde\u901a\u5206\u91cf<\/h2>\n\n\n\n
<\/p>\n\n\n\n
\u65e0\u5411\u56fe\u7684\u53cc\u8fde\u901a\u5206\u91cf<\/h2>\n\n\n\n
<\/p>\n\n\n\n
\u6b27\u62c9\u56de\u8def<\/h2>\n\n\n\n
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\u6b27\u62c9\u8def\u5f84<\/h2>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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