[SWEA] 팰린드롬 문제

 

 

[문제]

https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AYtrCJQaDb4DFAR-

SW Expert Academy

 

 

 

[소스 코드]

import java.io.*;
import java.util.*;
public class Solution {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st;
		StringBuilder sb;
		int T = Integer.parseInt(br.readLine());
		for(int tc=1;tc<=T;tc++) {
			st = new StringTokenizer(br.readLine());
			int n = Integer.parseInt(st.nextToken());
			int m = Integer.parseInt(st.nextToken());
			String[] words = new String[n];
			for(int i=0;i<n;i++) {
				words[i] = br.readLine();
			}
			HashSet<String> hs = new HashSet<>();
			int result = 0;
			boolean check = false;
			for(int i=0;i<n;i++) {
				sb = new StringBuilder(words[i]).reverse();
				if(hs.contains(words[i])) {
					result += m * 2; 
				} 
				hs.add(String.valueOf(sb));
				if(!check && palindrome(words[i])) {
					result += m;
					check = true;
				}
			}
			System.out.println("#"+tc+" "+result);
		}
	}
	private static boolean palindrome(String s) {
		for(int i=0;i<s.length()/2;i++) {
			if(s.charAt(i)!=s.charAt(s.length()-1-i)) return false;
		}
		return true;
	}
}