Rny_string

https://school.programmers.co.kr/learn/courses/30/lessons/181863

• 문제 풀이

class Solution {
    public String solution(String rny_string) {           
        if(rny_string.contains("m"))
            rny_string = rny_string.replace("m", "rn");
        
        return rny_string;
    }
}

class Solution {
    public String solution(String rny_string) {
        return rny_string.replace("m", "rn");
    }
}