백준 5622번: 다이얼

문제출처: https://www.acmicpc.net/problem/5622

import java.io.BufferedReader;
import java.io.InputStreamReader;
 
public class Main {
    
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String input = reader.readLine();
        // 2:ABC, 3:DEF, 4:GHI, 5:JKL, 6:MNO, 7:PQRS, 8:TUV, 9:WXYZ (1초씩 더 걸림)
        int[] arr = {3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10};
        int result = 0;
        
        for(int i=0 ; i<input.length() ; i++)
            result += arr[input.charAt(i)-'A'];
        
        System.out.println(result);
    }
}