class Solution {
public String solution(String code) {
String answer = "";
int mode = 0;
for(int i =0; i < code.length(); i++){
String a = code.substring(i, i+1);
if(mode == 0){
if(!a.equals("1")){
if(i % 2 ==0){
answer += a;
}
}else{
mode = 1;
}
}else{
if(!a.equals("1")){
if( i % 2 != 0){
answer += a;
}
}else{
mode =0;
}
}
}
if(answer.equals("")) answer = "EMPTY";
return answer;
}
}
으... 문제가 꽤나길다
성공!