Poj1056---IMMEDIATE DECODABILITY(Trie)

传送门

裸Trie，不想多说

 1 #include<cstdio>
 2 #include<iostream>
 3 #include<cmath>
 4 #include<cstring>
 5 #include<algorithm>
 6 #include<cstdlib>
 7 using namespace std;
 8 char s[100005];
 9 int ch[100005][15],tot=1;
10 bool bo[100005];
11 void init()
12 {
13     memset(ch,0,sizeof(ch));
14     memset(bo,false,sizeof(bo)); tot=1;
15 }
16 bool insert(char *st)
17 {
18     int u=1,n=strlen(st); bool flag=false;
19     for (int i=0; i<n; i++){
20         int c=st[i]-'0';
21         if (!ch[u][c]) ch[u][c]=++tot;
22             else if (i==n-1) flag=true;
23         if (bo[u]) flag=true;
24         u=ch[u][c];
25     }
26     bo[u]=true; return flag;
27 }
28 int main()
29 {
30     int js=1; bool flag=false;
31     while (cin>>s){
32         if (s[0]=='9' && (s[1]<'0' || s[1]>'9')) {
33             if (flag) printf("Set %d is not immediately decodable\n",js); else printf("Set %d is immediately decodable\n",js);
34             js++; flag=false; init(); continue;
35         }
36         flag=flag|insert(s);
37     }
38     return 0;
39 }

miao~~

posted @ 2018-08-01 15:22  wangyh1008  阅读(143)  评论(0)  编辑  收藏  举报