题解 | #牛族寻找祖先#

import java.util.*;
public class Solution {
    public String findAncestor (String[] names) {
        String split=names[0];
        for (int i=1;i< names.length;i++){
            int x=0,y=0,z=split.length();
            while (x<z&&split.charAt(x)==names[i].charAt(y)){
                x+=1;
                y+=1;
            }
            if (x>0){
                split=  split.substring(0,x);
            }else {
                split="";
                break;
            }
        }
        return split；
    }
}