UVaOJ 401 - Palindromes

╰半夏微凉° 2022-08-27 10:41 197阅读 0赞

> ### 401 - Palindromes ###
> 
> Time limit: 3.000 seconds
> 
> A regular palindrome is a string of numbers or letters that is the same forward as backward. For example, the string "ABCDEDCBA" is a palindrome because it is the same when the string is read from left to right as when the string is read from right to left.  
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> A mirrored string is a string for which when each of the elements of the string is changed to its reverse (if it has a reverse) and the string is read backwards the result is the same as the original string. For example, the string "3AIAE" is a mirrored string because "A" and "I" are their own reverses, and "3" and "E" are each others' reverses.  
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> A mirrored palindrome is a string that meets the criteria of a regular palindrome and the criteria of a mirrored string. The string "ATOYOTA" is a mirrored palindrome because if the string is read backwards, the string is the same as the original and because if each of the characters is replaced by its reverse and the result is read backwards, the result is the same as the original string. Of course, "A", "T", "O", and "Y" are all their own reverses.  
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> A list of all valid characters and their reverses is as follows.  
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> Character Reverse Character Reverse Character Reverse  
> A A M M Y  Y  
> B N Z 5  
> C O O 1 1  
> D P 2 S  
> E 3 Q 3 E  
> F R 4   
> G S  2 5 Z  
> H H T T 6   
> I I  U U 7   
> J L  V V 8 8  
> K W W 9   
> L J  X X   
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> Note that O (zero) and 0 (the letter) are considered the same character and therefore ONLY the letter "0" is a valid character.  
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> Input  
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> Input consists of strings (one per line) each of which will consist of one to twenty valid characters. There will be no invalid characters in any of the strings. Your program should read to the end of file.  
> Output  
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> For each input string, you should print the string starting in column 1 immediately followed by exactly one of the following strings.  
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> STRING CRITERIA  
> " -- is not a palindrome." if the string is not a palindrome and is not a mirrored string  
> " -- is a regular palindrome." if the string is a palindrome and is not a mirrored string  
> " -- is a mirrored string." if the string is not a palindrome and is a mirrored string  
> " -- is a mirrored palindrome." if the string is a palindrome and is a mirrored string  
> Note that the output line is to include the -'s and spacing exactly as shown in the table above and demonstrated in the Sample Output below.  
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> In addition, after each output line, you must print an empty line.  
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> Sample Input  
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> NOTAPALINDROME  
> ISAPALINILAPASI  
> 2A3MEAS  
> ATOYOTA  
> Sample Output  
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> NOTAPALINDROME -- is not a palindrome.  
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> ISAPALINILAPASI -- is a regular palindrome.  
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> 2A3MEAS -- is a mirrored string.  
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> ATOYOTA -- is a mirrored palindrome.
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>     //一道简单的字符串。
>     #include <stdio.h>
>     #include <string.h>
>     
>     void fuzhi(char ch[][3]);
>     int panduan(char ch[][3], char ch1, char ch2);
>     void shuchu(char ch1[], int a, int b);
>     
>     int main()
>     {
>         char ch[40][3], ch1[50];
>         int mi, pa, len;
>         int i;
>     
>         fuzhi(ch);//比较欣赏这样的格式，如果输入，赋值这样的预处理多的话可以定义个函数，这样代码就好看很多；
>     
>         while(scanf("%s", ch1)!= -1)
>         {
>             len = strlen(ch1);
>             mi = pa = 1;
>             for(i=0; i<=len/2; i++)
>             {
>                 if(ch1[i] != ch1[len-i-1])
>                 {
>                     pa = 0;
>                     if(panduan(ch, ch1[i], ch1[len-i-1])==0)
>                         mi = 0;
>                 }
>                 else
>                 {
>                     if(panduan(ch, ch1[i], ch1[len-i-1])==0)
>                         mi = 0;
>                 }
>                 if(pa==mi && mi==0)
>                     break;
>             }
>             shuchu(ch1, pa, mi);
>     
>         }
>     
>         return 0;
>     }
>     void fuzhi(char ch[][3])
>     {
>         int i;
>     
>         for(i=0; i<=40; i++)
>             ch[i][1] = 0;
>     
>         ch[1][0] = 'A';
>         for(i=2; i<=26; i++)
>             ch[i][0] = ch[i-1][0]+1;
>     
>         ch[27][0]='1';
>         for(i=28; i<=35; i++)
>             ch[i][0] = ch[i-1][0]+1;
>     
>     
>         ch[1][1] = 'A';
>         ch[5][1] = '3';
>         for(i=8; i<=9; i++)
>             ch[i][1] = ch[i][0];
>         ch[10][1] = 'L';
>         ch[12][1] = 'J';
>         ch[13][1] = 'M';
>         ch[15][1] = 'O';
>         ch[19][1] = '2';
>         for(i=20; i<=25; i++)
>             ch[i][1] = ch[i][0];
>         ch[26][1] = '5';
>         ch[27][1] = '1';
>         ch[28][1] = 'S';
>         ch[29][1] = 'E';
>         ch[31][1] = 'Z';
>         ch[34][1] = '8';
>     }
>     int panduan(char ch[][3], char ch1, char ch2)
>     {
>         int i;
>         for(i=1; i<=35; i++)
>         {
>             if(ch[i][0]==ch1)
>             {
>                 if(ch2 != ch[i][1])
>                     return 0;
>                 return 1;
>             }
>         }
>         return 0;
>     }
>     void shuchu(char ch1[], int a, int b)
>     {
>         printf("%s", ch1);
>         if(a==1 && b==1)
>             printf(" -- is a mirrored palindrome.");
>         else if(a==1 && b==0)
>             printf(" -- is a regular palindrome.");
>         else if(a==0 && b==1)
>             printf(" -- is a mirrored string.");
>         else
>             printf(" -- is not a palindrome.");
>         printf("\n\n");
>     }
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