Hardwood Species

6:Hardwood Species

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总时间限制: 

10000ms 

内存限制: 

65536kB

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. 
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

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

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 AlderAshAspenBasswoodAshBeechYellow BirchAshCherryCottonwoodAshCypressRed ElmGumHackberryWhite OakHickoryPecanHard MapleWhite OakSoft MapleRed OakRed OakWhite OakPoplanSassafrasSycamoreBlack WalnutWillow

样例输出

Ash 13.7931Aspen 3.4483Basswood 3.4483Beech 3.4483Black Walnut 3.4483Cherry 3.4483Cottonwood 3.4483Cypress 3.4483Gum 3.4483Hackberry 3.4483Hard Maple 3.4483Hickory 3.4483Pecan 3.4483Poplan 3.4483Red Alder 3.4483Red Elm 3.4483Red Oak 6.8966Sassafras 3.4483Soft Maple 3.4483Sycamore 3.4483White Oak 10.3448Willow 3.4483Yellow Birch 3.4483

提示

This problem has huge input, use scanf instead of cin to avoid time limit exceeded.

来源

Waterloo Local 2002.01.26

#include<iostream>#include<cmath>#include<cstring>#include<algorithm>#include<iomanip>#include<queue>#include<stack>#include<vector>#include<set>#include<map>using namespace std;char c[35];double sum=1;struct Node{char s[35]={0};int num;Node*l;Node*r;Node(const char*p){strcpy(s,p);l=NULL;r=NULL;num=1;}};Node*root;void Insert(Node*p){int Cmp=strcmp(c,p->s);if(Cmp==0){p->num++;return;}else if(Cmp<0){if(p->l!=NULL){Insert(p->l);return;}else{p->l=new Node(c);return;}}else{if(p->r!=NULL){Insert(p->r);return;}else{p->r=new Node(c);return;}}}void Mid(Node*p){if(p==NULL)return;Mid(p->l);cout<<p->s<<" "<<fixed<<setprecision(4)<<(double(p->num))*100/sum<<endl;Mid(p->r);}int main(){gets(c);root=new Node(c);while(gets(c)){sum=sum+1;Insert(root);}Mid(root);return 0;}