HDU1075What Are You Talking About

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火星文Trie插入

对应英文存到数组查询

对于每一个火星文句子,拆成若干单词分别在Trie树中查询

PS:开数组的话要开大,大概100W左右,不然会一直RE……

 1 #include<cstdio>
 2 #include<cstring>
 3 using namespace std;
 4 #define MAXN 1000100
 5 int trie[MAXN][30],tag[MAXN],cnt,sz;
 6 char s[MAXN][30],ans[MAXN],tmp[MAXN]; 
 7 void insert(int len){
 8     int x=0;
 9     for (int i=0;i<len;i++){
10         if (!trie[x][tmp[i]-\'a\'])
11             trie[x][tmp[i]-\'a\']=++sz;
12         x=trie[x][tmp[i]-\'a\'];
13     }
14     tag[x]=cnt;
15 }
16 int ask(int l,int r){
17     int x=0;
18     for (int i=l;i<r;i++){
19         if (!trie[x][tmp[i]-\'a\']) return 0;
20         x=trie[x][tmp[i]-\'a\'];
21     }
22     return tag[x];
23 }
24 int main(){
25     cnt=1;sz=0;
26     scanf("%s",s[cnt]);
27     while (s[cnt][0]!=\'E\'){
28         if (s[cnt][0]==\'S\'){
29             scanf("%s",s[cnt]);
30             continue;
31         }
32         scanf("%s",tmp);
33         int len=strlen(tmp);
34         insert(len);
35         cnt++;
36         scanf("%s",s[cnt]);
37     }
38     scanf("%s",tmp);
39     while (tmp[0]!=\'E\'){
40         if (tmp[0]==\'S\'){
41             getchar();//这个一定要加上…… 
42             gets(tmp);continue;
43         }
44         int k=0,q=0,p,judge,len=strlen(tmp);
45         while (k<len){
46             judge=0;p=k;
47             while (tmp[k]>=\'a\'&&tmp[k]<=\'z\'){
48                 k++;judge=1;
49             }
50             if (!judge){
51                 ans[q]=tmp[k];
52                 q++;k++;
53                 continue; 
54             }
55             int pos=ask(p,k);
56             if (pos){
57                 int lenth=strlen(s[pos]);
58                 for (int i=0;i<lenth;i++){
59                     ans[q]=s[pos][i];q++;
60                 }
61             }
62             else
63                 for (int i=p;i<k;i++){
64                     ans[q]=tmp[i];
65                     q++;
66                 }
67         }
68         for (int i=0;i<q;i++)
69             printf("%c",ans[i]);
70         printf("\\n");
71         gets(tmp);
72     }
73     return 0;
74 }
STD

 

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