2023-04-21 시저 암호

Summary

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import java.util.*;

class Solution {
    public String solution(String s, int n) {
        char[] arr = s.toCharArray();
        for (int i=0; i<arr.length; i++) {
            if (arr[i] == ' ') {
                continue;
            }
            int offset = Character.isUpperCase(arr[i]) ? 'A':'a';
            int move = (arr[i] - offset + n) % ('Z' - 'A' + 1);
            arr[i] = (char) (offset + move);
        }
        
        return new String(arr);
    }
}

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