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。
1/* ***********************************************
2Author :111qqz
3Created Time :2016年01月22日 星期五 17时58分02秒
4File Name :code/uva/409.cpp
5************************************************ */
6
7#include <cstdio>
8#include <cstring>
9#include <iostream>
10#include <algorithm>
11#include <vector>
12#include <queue>
13#include <set>
14#include <map>
15#include <string>
16#include <cmath>
17#include <cstdlib>
18#include <ctime>
19#define fst first
20#define sec second
21#define lson l,m,rt<<1
22#define rson m+1,r,rt<<1|1
23#define ms(a,x) memset(a,x,sizeof(a))
24typedef long long LL;
25#define pi pair < int ,int >
26#define MP make_pair
27
28using namespace std;
29const double eps = 1E-8;
30const int dx4[4]={1,0,0,-1};
31const int dy4[4]={0,-1,1,0};
32const int inf = 0x3f3f3f3f;
33string str[50];
34int k,e;
35int num[50];
36set<string>se;
37
38struct node
39{
40 string exc;
41 string ori;
42 int num;
43 bool operator<(node b)const
44 {
45 return num>b.num;
46 }
47}ex[50];
48
49int main()
50{
51 #ifndef ONLINE_JUDGE
52 freopen("code/in.txt","r",stdin);
53 #endif
54 int cas = 0 ;
55 while (scanf("%d %d",&k,&e)!=EOF)
56 {
57 se.clear();
58 ms(num,0);
59 printf("Excuse Set #%d\n",++cas);
60
61 for ( int i = 0 ; i < k ; i++)
62 {
63 cin>>str[i];
64 int len = str[i].length();
65 for ( int j = 0 ; j < len ;j++)
66 {
67 str[i][j] = tolower(str[i][j]);
68 }
69 se.insert(str[i]);
70 }
71 getchar();
72// for ( int i = 0 ; i < k ;i++) cout<<"str[i]:"<<str[i]<<endl;
73 for ( int i = 0 ; i < e ; i++)
74 {
75 getline(cin,ex[i].exc);
76 ex[i].ori=ex[i].exc;
77 int len = ex[i].exc.length();
78 for ( int j = 0 ; j < len ; j++)
79 {
80 ex[i].exc[j] = tolower(ex[i].exc[j]);
81 if (ex[i].exc[j]<'a'||ex[i].exc[j]>'z')
82 ex[i].exc[j]=' '; //把非字母部分都转化成空格.
83 }
84 }
85
86// for ( int i = 0 ; i < e ; i++) cout<<"exc[i]:"<<ex[i].exc<<endl;
87
88 int ans = -1;
89
90 for ( int i = 0 ; i < e ;i++)
91 {
92 int cnt = 0 ;
93 string cpy = ex[i].exc;
94 int pos = 0 ;
95 while (pos!=-1)
96 {
97 pos = cpy.find(' ');
98 string tmp = cpy.substr(0,pos-0);
99 if (se.count(tmp)==1) cnt++;
100 cpy.erase(0,pos+1);
101 //cout<<i<<"cpy:"<<cpy<<cpy.length()<<endl;
102 }
103
104 ex[i].num=cnt;
105 }
106// for ( int i = 0 ; i < e ; i++) cout<<"num[i]:"<<ex[i].num<<endl;
107 sort(ex,ex+e);
108 for ( int i = 0 ; i < e ; i++)
109 {
110 if (ex[i].num==ex[0].num)
111 {
112 cout<<ex[i].ori<<endl;
113 }
114 }
115 cout<<endl;
116 }
117
118
119 #ifndef ONLINE_JUDGE
120 fclose(stdin);
121 #endif
122 return 0;
123}