HDU 1075 What Are You Talking About （Trie树）

Posted 2020-09-18 EricJeffrey

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1075

map可以过。。。我上的字典树，小bug有点尴尬，题目没有明确给出数据范围也是无奈。

贡献了几次RE 一次WA。尴尬。discuss里面有个说注意前缀的到是给了点tip。总体来说不错

代码：

  1 #define _CRT_SECURE_NO_WARNINGS
  2 #include <functional>
  3 #include <algorithm>
  4 #include <iostream>
  5 #include <cstring>
  6 #include <cassert>
  7 #include <cstdio>
  8 #include <cctype>
  9 #include <vector>
 10 #include <string>
 11 #include <queue>
 12 #include <stack>
 13 #include <cmath>
 14 #include <map>
 15 #include <set>
 16 using namespace std;
 17 #define rep(i,a,n) for (int i=a;i<n;i++)
 18 #define per(i,a,n) for (int i=n-1;i>=a;i--)
 19 #define pb push_back
 20 #define mp make_pair
 21 #define all(x) (x).begin(),(x).end()
 22 #define fi first
 23 #define se second
 24 #define SZ(x) ((int)(x).size())
 25 typedef vector<int> VI;
 26 typedef long long ll;
 27 typedef pair<int, int> PII;
 28 const ll mod = 1000000007;
 29 ll powmod(ll a, ll b) { ll res = 1; a %= mod; assert(b >= 0); for (; b; b >>= 1) { if (b & 1)res = res*a%mod; a = a*a%mod; }return res; }
 30 // head
 31 const int inf = 0x3f3f3f3f;
 32 #define maxn 15
 33 #define maxnode 26
 34 int trie[500000][maxnode];
 35 int val[500000][maxnode];
 36 int totid = 1;
 37 
 38 void init(){
 39     memset(trie, 0, sizeof(trie));
 40     memset(val, -1, sizeof(val));
 41     totid = 1;
 42 }
 43 void insert_node(char *x, int y){
 44     int p = 1, len = strlen(x);
 45     for(int i = 0; i < len - 1; i++){
 46         if(trie[p][x[i] - ‘a‘]){
 47             p = trie[p][x[i] - ‘a‘];
 48         }
 49         else{
 50             p = trie[p][x[i] - ‘a‘] = ++totid;
 51         }
 52     }
 53     val[p][x[len - 1] - ‘a‘] = y;
 54     return;
 55 }
 56 int find_node(char *x){
 57     int p = 1, len = strlen(x);
 58     int tmval = -1;
 59     for(int i = 0; i < len; i++){
 60         if(i == len - 1){
 61             tmval = val[p][x[i] - ‘a‘];
 62             return tmval;
 63         }
 64         if(trie[p][x[i] - ‘a‘]){
 65             p = trie[p][x[i] - ‘a‘];
 66         }
 67         else{
 68             return tmval;
 69         }
 70     }
 71     return tmval;
 72 }
 73 
 74 char dict[500005][maxn];
 75 char book[500005], chn[maxn],eng[maxn];
 76 
 77 int main(){
 78     scanf("%s", chn);
 79     int ttid = 0;
 80     init();
 81     while(scanf(" %s", chn) && strcmp(chn, "END") != 0){
 82         strcpy(dict[ttid], chn);
 83         scanf(" %s",eng);
 84         insert_node(eng, ttid++);
 85     }
 86     scanf("%s", chn);
 87     getchar();
 88     while(gets(book) && strcmp(book, "END") != 0){
 89         int len = strlen(book);
 90         for(int i = 0; i < len;){
 91             while(!isalpha(book[i]) && book[i]) {
 92                 printf("%c", book[i]);
 93                 i++;
 94             }
 95             int j = i;
 96             while(isalpha(book[j])) j++;
 97             char tmx[maxn];
 98             strncpy(tmx, book + i, j - i);
 99             tmx[j - i] = ‘\0‘;
100             int tmf = find_node(tmx);
101             if(tmf != -1){
102                 printf("%s", dict[tmf]);
103             }
104             else{
105                 for(int k = i; k < j; k++)
106                     printf("%c", book[k]);
107             }
108             i = j;
109         }
110         puts("");
111     }
112 }
113 /*
114 START
115 from fiwo
116 hello difh
117 trap dif
118 mars riwosf
119 earth fnnvk
120 like fiiwj
121 END
122 START
123 difh, i‘m fiwo riwosf.
124 i fiiwj fnnvk! dif fnn
125 END
126 */

题目：

What Are You Talking About

Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 102400/204800 K (Java/Others)
Total Submission(s): 22781    Accepted Submission(s): 7604

Problem Description

Ignatius is so lucky that he met a Martian yesterday. But he didn‘t know the language the Martians use. The Martian gives him a history book of Mars and a dictionary when it leaves. Now Ignatius want to translate the history book into English. Can you help him?

 

 

Input

The problem has only one test case, the test case consists of two parts, the dictionary part and the book part. The dictionary part starts with a single line contains a string "START", this string should be ignored, then some lines follow, each line contains two strings, the first one is a word in English, the second one is the corresponding word in Martian‘s language. A line with a single string "END" indicates the end of the directory part, and this string should be ignored. The book part starts with a single line contains a string "START", this string should be ignored, then an article written in Martian‘s language. You should translate the article into English with the dictionary. If you find the word in the dictionary you should translate it and write the new word into your translation, if you can‘t find the word in the dictionary you do not have to translate it, and just copy the old word to your translation. Space(‘ ‘), tab(‘\t‘), enter(‘\n‘) and all the punctuation should not be translated. A line with a single string "END" indicates the end of the book part, and that‘s also the end of the input. All the words are in the lowercase, and each word will contain at most 10 characters, and each line will contain at most 3000 characters.

 

 

Output

In this problem, you have to output the translation of the history book.

 

 

Sample Input

START from fiwo hello difh mars riwosf earth fnnvk like fiiwj END START difh, i‘m fiwo riwosf. i fiiwj fnnvk! END

 

 

Sample Output

hello, i‘m from mars. i like earth!

Hint

Huge input, scanf is recommended.

 

 

Author

Ignatius.L