✔ 문제

✔ 해결

class Solution {
  public int solution(String s) {
    int answer = 0, z = 0;
    String sArr = s.split(" ");
    
    for(int i = 0; i < sArr.length; i++) {
      if(!sArr[i].equals("Z") {
        answer += Integer.parseInt(sArr[i]);
      }else {
        z = i;
        answer -= Integer.parseInt(sArr[z - 1]);
      }
    }
    
    return answer;
  }
}