HDU_2163 Palindromes

Palindromes

Problem Description

Write a program to determine whether a word is a palindrome. A palindrome is a sequence of characters that is identical to the string when the characters are placed in reverse order. For example, the following strings are palindromes: “ABCCBA”, “A”, and “AMA”. The following strings are not palindromes: “HELLO”, “ABAB” and “PPA”.

 

 

Input

The input file will consist of up to 100 lines, where each line contains at least 1 and at most 52 characters. Your program should stop processing the input when the input string equals “STOP”. You may assume that input file consists of exclusively uppercase letters; no lowercase letters, punctuation marks, digits, or whitespace will be included within each word.

 

 

Output

A single line of output should be generated for each string. The line should include “#”, followed by the problem number, followed by a colon and a space, followed by the string “YES” or “NO”.

 

 

Sample Input

ABCCBA
A
HELLO
ABAB
AMA
ABAB
PPA
STOP

 

#include <stdio.h>
#include <string.h>
char s[60];
int main()
{
    int k=1;
    while(gets(s),strcmp(s,"STOP")!=0)
    {
       int i,j,len;
       len=strlen(s);
       for(i=0;i<len/2;i++)
       {
         if(s[i]!=s[len-1-i])
         break;
       }
       printf("#%d: ",k++);
       if(i>=len/2)
       printf("YES\n");
       else
       printf("NO\n");
    }
    return 0;
}

 

Sample Output

#1: YES
#2: YES
#3: NO
#4: NO
#5: YES
#6: NO
#7: NO