HDU 4287 (13.08.17)

Problem Description

We all use cell phone today. And we must be familiar with the intelligent English input method on the cell phone. To be specific, the number buttons may correspond to some English letters respectively, as shown below:
2 : a, b, c    3 : d, e, f    4 : g, h, i    5 : j, k, l    6 : m, n, o    

7 : p, q, r, s  8 : t, u, v    9 : w, x, y, z

When we want to input the word “wing”, we press the button 9, 4, 6, 4, then the input method will choose from an embedded dictionary, all words matching the input number sequence, such as “wing”, “whoi”, “zhog”. Here comes our question, given a dictionary, how many words in it match some input number sequences?

 

Input

First is an integer T, indicating the number of test cases. Then T block follows, each of which is formatted like this:

Two integer N (1 <= N <= 5000), M (1 <= M <= 5000), indicating the number of input number sequences and the number of words in the dictionary, respectively. Then comes N lines, each line contains a number sequence, consisting of no more than 6 digits. Then comes M lines, each line contains a letter string, consisting of no more than 6 lower letters. It is guaranteed that there are neither duplicated number sequences nor duplicated words.

 

Output

For each input block, output N integers, indicating how many words in the dictionary match the corresponding number sequence, each integer per line.

 

Sample Input

1
3 5
46
64448
74
go
in
night
might
gn

 

Sample Output

3
2
0

题意与思路:

输入N个按键序列, 再输入M个单词, 要求我们对M个单词进行检索, 求出其按键序列

然后统计, N个按键序列每个分别出现了几次

错误点: 由于不注意严谨, 以为少写一个break没事, 导致超时~

我有两份代码, 一份是错误的, 还没找出错误来, 一份已AC;

AC代码:

#include<stdio.h>
#include<string.h>

int t[26] = {2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 9};

int T, N, M;

int ans[5555];
char num[5555][10];
char word[5555][10];

void getans(char *p) {
    int i, len;
    int pos = 0;
    char t_num[10];
    len = strlen(p);
    for(i = 0; i < len; i++)
        t_num[pos++] = t[p[i]-'a'] + '0';
    t_num[pos] = '\0';
    for(i = 0; i < N; i++)
        if(strcmp(t_num, num[i]) == 0) {
            ans[i]++;
            break;
        }
}

int main() {
    scanf("%d", &T);
    while(T--) {
        int i;
        scanf("%d %d", &N, &M);

        getchar();

        memset(ans, 0, sizeof(ans));
        for(i = 0; i < N; i++)
            gets(num[i]);
        for(i = 0; i < M; i++)
            gets(word[i]);

        for(i = 0; i < M; i++)
            getans(word[i]);

        for(i = 0; i < N; i++)
            printf("%d\n", ans[i]);
    }
    return 0;
}

wrong代码:

#include<stdio.h>
#include<string.h>

int T, N, M;

char num[5555][10];
char word[5555][10];
int ans[5555];

char t[10][10];

void getans(char *p) {
    int i, j, k, pos = 0;
    char t_num[10];
    int len1, len2;
    len1 = strlen(p);
    for(i = 0; i < len1; i++) {
        for(j = 2; j < 10; j++) {
            len2 = strlen(t[j]);
            for(k = 0; k < len2; k++) {
                if(t[j][k] == p[i])
                    t_num[pos++] = j;
            }
        }
    }

    t_num[pos] = '\0';
    for(i = 0; i < N; i++) {
        if(strcmp(t_num, num[i]) == 0)
            ans[i]++;
    }
}

int main() {
    scanf("%d", &T);

    while(T--) {
        int i;
        scanf("%d%d", &N, &M);

        memset(ans, 0, sizeof(ans));
    	strcpy(t[2], "abc");
    	strcpy(t[3], "def");
    	strcpy(t[4], "ghi");
    	strcpy(t[5], "jkl");
    	strcpy(t[6], "mno");
    	strcpy(t[7], "pqrs");
    	strcpy(t[8], "tuv");
    	strcpy(t[9], "wxyz");

        for(i = 0; i < N; i++)
            gets(num[i]);
        for(i = 0; i < M; i++)
            gets(word[i]);

        for(i = 0; i < M; i++)
            getans(word[i]);

        for(i = 0; i < N; i++)
            printf("%d\n", ans[i]);
    }
    return 0;
}