1047. 删除字符串中的所有相邻重复项

https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string/

class Solution {
    public String removeDuplicates(String S) {
        for(int i=0;i<S.length()-1;i++){
            if(S.charAt(i)==S.charAt(i+1)){
                 S=S.substring(0,i)+S.substring(i+2,S.length());
                 i=-1;
            }
        }
        return S;
    }
}