poj_2528Mayor's posters(线段树) 标签: 线段树 题目连接 Mayor's posters Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 57848 Accepted: 16730 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign…

POJ.2528 Mayor's posters (线段树 区间更新 区间查询 离散化) 题意分析 贴海报,新的海报能覆盖在旧的海报上面,最后贴完了,求问能看见几张海报. 最多有10000张海报,海报左右坐标范围不超过10000000. 一看见10000000肯定就要离散化了,因为建树肯定是建不下.离散化的方法是:先存到一个数组里面,然后sort,之后unique去重,最后查他离散化的坐标lower_bound就行了.特别注意如果是从下标为0开始存储,最后结果要加一.多亏wmr神犇提醒. 这题是…

Mayor's posters Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 59683   Accepted: 17296 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral post…

Mayor's posters 转载自:http://blog.csdn.net/winddreams/article/details/38443761 [题目链接]Mayor's posters [题目类型]线段树+离散化 &题意: 给出一面墙,给出n张海报贴在墙上,每张海报都覆盖一个范围,问最后可以看到多少张海报 &题解: 海报覆盖的范围很大,直接使用数组存不下,但是只有最多10000张海报,也就是说最多出现20000个点,所以可以使用离散化,将每个点离散后,重新对给出控制的区间,这样…

Mayor's posters Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 51175 Accepted: 14820 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral posters…

线段树 + 离散化 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral posters at all places at their whim. The city council has finally decided to build an electoral…

Mayor's posters Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 43507   Accepted: 12693 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral post…

poj 2528 Mayor's posters 题目链接: http://poj.org/problem?id=2528 思路: 线段树+离散化技巧(这里的离散化需要注意一下啊,题目数据弱看不出来) 假设给出: 1~10 1~4 7-10 最后可以看见三张海报 如果离散化的时候不注意,就会变成 1 4 7 10(原始) 1 2 3 4 (离散化) 转化为: 1~4 1~2 3~4 这样的话最后只能看见两张海报 解决办法,如果原数据去重排序后相互之间差值大于1,则在他们之间再插入一个数值,使得大…

Mayor's posters Time Limit: 1000MS   Memory Limit: 65536K Total Submissions:75394   Accepted: 21747 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral poste…

Mayor's posters Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://poj.org/problem?id=2528 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral posters at al…