[알고리즘문제풀기] 치킨 쿠폰

문제

내가 작성한 정답

class Solution {
    public int solution(int chicken) {
        return chicken==0?0:(chicken-1)/9;
    }
}

class Solution {
    public int solution(int chicken) {
        int s=0;
        while(chicken>=10){
            s += chicken/10;
            chicken = chicken%10+chicken/10;
        }
        return s;
    }
}

다른 사람들의 정답

class Solution {
    public int solution(int chicken) {
        int answer = chicken/9;
        if(chicken>1&&chicken%9==0){
            answer--;
        }
        return answer;
    }
}