| 题目名称 | 1604. Hardwood Species |
|---|---|
| 输入输出 | pojtj.in/out |
| 难度等级 | ★☆ |
| 时间限制 | 10000 ms (10 s) |
| 内存限制 | 7 MiB |
| 测试数据 | 10 |
| 题目来源 |
 OI永别
于2014-04-19加入 |
| 开放分组 | 全部用户 |
| 提交状态 | |
| 分类标签 | |
| 分享题解 |
| 通过：25， 提交：76， 通过率：32.89% | ||||
 OI永别 |
100 | 1.287 s | 4.89 MiB | C++ |
 , |
100 | 1.644 s | 5.90 MiB | Pascal |
 Alan |
100 | 1.887 s | 0.31 MiB | C++ |
 绕着指尖 |
100 | 2.022 s | 0.32 MiB | C++ |
 H_Lost |
100 | 2.342 s | 0.31 MiB | C++ |
 He_Lost |
100 | 2.343 s | 0.31 MiB | C++ |
 Rivendell |
100 | 2.444 s | 0.31 MiB | C++ |
 Riolu |
100 | 2.480 s | 0.31 MiB | C++ |
 JSX |
100 | 2.485 s | 0.28 MiB | C++ |
 ztx |
100 | 2.496 s | 0.28 MiB | C++ |
| 关于 Hardwood Species 的近10条评论(全部评论) | ||||
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为啥在本地木有输出= =
Riolu
2016-03-15 20:48
8楼
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有种容器叫map
 Dream
2016-02-06 22:34
7楼
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k=(float)(*B).second*100/n还可以这样用，我还是太孤陋寡闻。各位都是poj的大神而我还再使用洛谷。。。。。
 NVIDIA
2015-08-14 19:01
6楼
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为什么我用set在poj上能过，而在cojs会跪，一定是我的set还不熟练。。。
 奶猹
2014-10-23 17:01
5楼
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回复 @高高高高高 :
STL真神奇 Alan
2014-04-21 20:01
3楼
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哈希表真神奇。。。。。。。。。。。。。。。。
,
2014-04-21 20:00
2楼
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VIP用trie会超内存
OI永别
2014-04-20 08:31
1楼
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水中音【题目描述】
Hardwoods are the botanical group of trees that have broad leaves, produce a fruit or nut, and generally go dormant in the winter.
不要害怕 下面有中文 America's temperate climates produce forests with hundreds of hardwood species -- trees that share certain biological characteristics. Although oak, maple and cherry all are types of hardwood trees, for example, they are different species. Together, all the hardwood species represent 40 percent of the trees in the United States.
On the other hand, softwoods, or conifers, from the Latin word meaning "cone-bearing," have needles. Widely available US softwoods include cedar, fir, hemlock, pine, redwood, spruce and cypress. In a home, the softwoods are used primarily as structural lumber such as 2x4s and 2x6s, with some limited decorative applications.
Using satellite imaging technology, the Department of Natural Resources has compiled an inventory of every tree standing on a particular day. You are to compute the total fraction of the tree population represented by each species.
不要害怕 下面有中文 America's temperate climates produce forests with hundreds of hardwood species -- trees that share certain biological characteristics. Although oak, maple and cherry all are types of hardwood trees, for example, they are different species. Together, all the hardwood species represent 40 percent of the trees in the United States.
On the other hand, softwoods, or conifers, from the Latin word meaning "cone-bearing," have needles. Widely available US softwoods include cedar, fir, hemlock, pine, redwood, spruce and cypress. In a home, the softwoods are used primarily as structural lumber such as 2x4s and 2x6s, with some limited decorative applications.
Using satellite imaging technology, the Department of Natural Resources has compiled an inventory of every tree standing on a particular day. You are to compute the total fraction of the tree population represented by each species.
【输入格式】
Input to your program consists of a list of the species of every tree observed by the satellite; one tree per line. No species name exceeds 30 characters. There are no more than 10,000 species and no more than 1,000,000 trees.
【输出格式】
Print the name of each species represented in the population, in alphabetical order, followed by the percentage of the population it represents, to 4 decimal places.
【样例输入】
Red Alder Ash Aspen Basswood Ash Beech Yellow Birch Ash Cherry Cottonwood Ash Cypress Red Elm Gum Hackberry White Oak Hickory Pecan Hard Maple White Oak Soft Maple Red Oak Red Oak White Oak Poplan Sassafras Sycamore Black Walnut Willow
【样例输出】
Ash 13.7931 Aspen 3.4483 Basswood 3.4483 Beech 3.4483 Black Walnut 3.4483 Cherry 3.4483 Cottonwood 3.4483 Cypress 3.4483 Gum 3.4483 Hackberry 3.4483 Hard Maple 3.4483 Hickory 3.4483 Pecan 3.4483 Poplan 3.4483 Red Alder 3.4483 Red Elm 3.4483 Red Oak 6.8966 Sassafras 3.4483 Soft Maple 3.4483 Sycamore 3.4483 White Oak 10.3448 Willow 3.4483 Yellow Birch 3.4483
【提示】
This problem has huge input, use scanf instead of cin to avoid time limit exceeded.
ps:注意看题内存限制和时间限制
题目大意：统计每一个字符串出现的百分比，一共有10W种，100W个