摘要： 区间更新用到的延迟标记，不过是在更新时只更新到最大父区间，不继续往下更新，把更新的状态记录下来。当访问到子区间时再根据相应记录及时更新，pushodown()。code:#include<cstdlib>#include<cctype>#include<cstring>#include<cstdio>#include<cmath>#include<algorithm>#include<vector>#include<string>#include<iostream>#include< 阅读全文