class Solution {
public String solution(int[] food) {
String answer = "";
String str3 = "";
for (int i = 1; i < food.length; i++) {
String str2 = "";
for (int j = 0; j < food[i] / 2; j++) {
answer += i;
}
for (int k = 0; k < food[i] / 2; k++) {
str2 += i;
}
str2 += str3;
str3 = str2;
}
answer+="0";
answer += str3;
return answer;
}
}