[Java]프로그래머스 Lv. 0 다항식 더하기

https://school.programmers.co.kr/learn/courses/30/lessons/120863

프로그래머스

나의 풀이

class Solution {
    public String solution(String polynomial) {
        String answer;
        int coe = 0;
        int con = 0;
        String[] degree = polynomial.split(" \\+ ");
        for (String d : degree) {
            if (d.equals("x")) coe++;
            else if (d.contains("x")) {
                d = d.substring(0, d.length()-1);
                coe += Integer.parseInt(d);
            }
            else {
                con += Integer.parseInt(d);
            }
        }
        if (con !=  0) {
            if (coe == 1) answer = "x + " + con;
            else if(coe == 0) answer = "" + con;
            else answer = coe + "x + " + con;
        } else {
            if (coe == 1) answer = "x";
            else answer = coe + "x";
        }

        return answer;
    }
}

다른 풀이

class Solution {
    public String solution(String polynomial) {
        int xCount = 0;
        int num = 0;

        for (String s : polynomial.split(" ")) {
            if (s.contains("x")) {
                xCount += s.equals("x") ? 1 : Integer.parseInt(s.replaceAll("x", ""));
            } else if (!s.equals("+")) {
                num += Integer.parseInt(s);
            }
        }
        return (xCount != 0 ? xCount > 1 ? xCount + "x" : "x" : "") + (num != 0 ? (xCount != 0 ? " + " : "") + num : xCount == 0 ? "0" : "");
    }
}