[백준] 11575 Affine Cipher - Implementation / Java

• 문제 링크

https://www.acmicpc.net/problem/11575

 

• 풀이 코드

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        int t = Integer.parseInt(br.readLine());
        while (t-- > 0) {
            StringTokenizer st = new StringTokenizer(br.readLine());
            int a = Integer.parseInt(st.nextToken()), b = Integer.parseInt(st.nextToken());
            for (char c : br.readLine().toCharArray()) bw.write((char) ((a * (c - 'A') + b) % 26 + 'A'));
            bw.newLine();
        }

        bw.flush();
    }

}