uva 409 - Excuses, Excuses!

https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid;=8&page;=show_problem&problem;=350 题意：给出k个key word,e个借口...找出包含key word最多的借口，即为最坏的借口。匹配补区分大小写&&同一个key word算多次。 思路：需要注意的是因为不区分大小写，需要都转化成大写或者小写。。但是输出的时候要输出原始的。。所以要另外存一份。

/* ***********************************************
Author :111qqz
Created Time :2016年01月22日 星期五 17时58分02秒
File Name :code/uva/409.cpp
************************************************ */

#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <string>
#include <cmath>
#include <cstdlib>
#include <ctime>
#define fst first
#define sec second
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define ms(a,x) memset(a,x,sizeof(a))
typedef long long LL;
#define pi pair < int ,int >
#define MP make_pair

using namespace std;
const double eps = 1E-8;
const int dx4[4]={1,0,0,-1};
const int dy4[4]={0,-1,1,0};
const int inf = 0x3f3f3f3f;
string str[50];
int k,e;
int num[50];
set<string>se;

struct node
{
    string exc;
    string ori;
    int num;
    bool operator<(node b)const
    {
	return num>b.num;
    }
}ex[50];

int main()
{
	#ifndef  ONLINE_JUDGE 
	freopen("code/in.txt","r",stdin);
  #endif
	int cas = 0 ;
	while (scanf("%d %d",&k,&e)!=EOF)
	{
	    se.clear();
	    ms(num,0);
	    printf("Excuse Set #%d\n",++cas);

	    for ( int i = 0 ; i < k ; i++)
	    {
		cin>>str[i];
		int len = str[i].length();
		for ( int j = 0 ; j < len ;j++)
		{
		    str[i][j] = tolower(str[i][j]);
		}
		se.insert(str[i]);
	    }
	    getchar();
//	    for ( int i = 0 ; i < k ;i++) cout<<"str[i]:"<<str[i]<<endl;
	    for ( int i = 0 ; i < e ; i++)
	    {
		getline(cin,ex[i].exc);
		ex[i].ori=ex[i].exc;
		int len = ex[i].exc.length();
		for ( int j = 0 ; j < len ; j++)
		{
		    ex[i].exc[j] = tolower(ex[i].exc[j]);
		    if (ex[i].exc[j]<'a'||ex[i].exc[j]>'z')
			ex[i].exc[j]=' ';  //把非字母部分都转化成空格.
		}
	    }

//	    for ( int i = 0 ; i < e ; i++) cout<<"exc[i]:"<<ex[i].exc<<endl;

	    int ans = -1;
	
	    for ( int i = 0 ; i < e ;i++)
	    {
		int cnt = 0 ;
		string cpy = ex[i].exc;
		int pos = 0 ;
		while (pos!=-1)
		{
		    pos = cpy.find(' ');
		    string tmp = cpy.substr(0,pos-0);
		    if (se.count(tmp)==1) cnt++;
		    cpy.erase(0,pos+1);
		    //cout<<i<<"cpy:"<<cpy<<cpy.length()<<endl;
		}
		
		ex[i].num=cnt;
	    }
//	    for ( int i = 0 ; i < e ; i++) cout<<"num[i]:"<<ex[i].num<<endl;
	    sort(ex,ex+e);
	    for ( int i = 0 ; i < e ; i++)
	    {
		if (ex[i].num==ex[0].num)
		{
		    cout<<ex[i].ori<<endl;
		}
	    }
	    cout<<endl;
	}


  #ifndef ONLINE_JUDGE  
  fclose(stdin);
  #endif
    return 0;
}