[0단계]두 수의 연산값 비교하기

class Solution {
    public int solution(int a, int b) {
        int answer = 0;
        int ab = a+b;
        int twoAB = 2*a*b;
        if(ab==twoAB){
            answer = ab;
        }else{
               answer = Math.max(Integer.parseInt(a+""+b),twoAB);     
        }
        return answer;
    }
}

class Solution {
    public int solution(int a, int b) {
        int add = Integer.parseInt(a+""+b);
        int mul = 2 * a * b;
        return Math.max(add, mul);
    }
}