HDU 1075 What Are You Talking About

What Are You Talking About

Time Limit: 10000/5000 MS (Java/Others)Memory Limit: 102400/204800 K (Java/Others)
Total Submission(s): 4539Accepted Submission(s): 1368

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

OK! from now on, I will try to write in English, just for some pratice, because it will be a CET-4 in next term.

When you guys look at the simple input and simple output, i think you have already know we must use Trie to solve this problem.

So the next step is simple , just"TYPE ATire".

But at this time, i try anotherway to plant this tree!!!!So we haveTHREE Trie style!!!!!!!!!!

The new way's core is the "Pointer point to the Pointer". I will talk about it in detail in another post.

After you have planted the Trie, we must deal with the sentence. In my own way, easily,just use the function "isalpha()" which in "cctype", to seperate the lowcase from other characters.

So, Here is the code:

4328318

2011-08-04 10:43:57

Accepted

1075

328MS

74688K

1388 B

C++

10SGetEternal{（。）（。）}!

#include <iostream>
#include <string>
#include <cctype>
using namespace std;
#define MAXI 3030

class Trie
{
public :
    struct node
    {
        string key;
        node *next[30];
    } *root, **p;
    Trie() { Cre(root); }
    void Cre(node *&x)
    {
        int i;
        x = new node;
        x->key = "-1";
        for (i = 0; i < 30; i++)
            x->next[i] = NULL;
    }
    void Ins(char *key, char *tra)
    {
        int i;
        p = &root;
        for (i = 0; key[i]; i++)
        {
            p = &((*p)->next[key[i] - 'a']);
            if (*p == NULL) Cre(*p);
        }
        (*p)->key = tra;
    }
    string Que(const char *key)
    {
        int i;
        p = &root;
        for (i = 0; key[i]; i++)
        {
            p = &((*p)->next[key[i] - 'a']);
            if (*p == NULL) break;
        }
        if (*p) return (*p)->key;
        else return "-1";
    }
}zkl;

int main()
{
    char a[MAXI], b[MAXI], ste[MAXI];
    string w1, w2;
    int i;

    scanf("%s", ste);
    while (scanf("%s", a), strcmp(a, "END"))
    {
        scanf("%s", b);
        zkl.Ins(b, a);
    }

    scanf("%s", ste);
    getchar();
    while (gets(ste))
    {
        if (!strcmp(ste, "END"))
            break;
        w1 = "";
        strcat(ste, "\n");
        for (i = 0; i < strlen(ste); i++)
            if (isalpha(ste[i]))
                w1 += ste[i];
            else
            {
                if (w1 != "")
                {
                    w2 = zkl.Que(w1.c_str());
                    if (w2 == "-1") printf("%s", w1.c_str());
                    else printf("%s", w2.c_str());
                    w1 = "";
                }
                printf("%c", ste[i]);
            }
    }

    return 0;
}

It's not so hard all the way~~~RIGHT?!