class Solution { public String longestCommonPrefix(String[] strs) { if(strs.length==0){ return " "; } String prefix = strs[0]; for(int i=1;i<strs.length;i++){ while(strs[i].indexOf(prefix)!=0){ prefix=prefix.substring(0,prefix.length()-1); if (prefix.isEmpty()) { return ""; } } } } return prefix; }
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