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1087.java
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1087.java
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class Solution {
public String[] permute(String S) {
char[] s = S.toCharArray();
int pos = 0;
List<String> ret = new ArrayList<>();
ret.add("");
while(pos < s.length){
List<String> next = new ArrayList<>();
if(s[pos] == '{'){
pos++;
while(true){
String w = "";
while(s[pos] != ',' && s[pos] != '}' && s[pos] != '{'){
w += s[pos];
pos++;
}
for(String r : ret){
next.add(r + w);
}
if(s[pos] == ','){
pos++;
}else{
pos++;
break;
}
}
}else{
String w = "";
while(pos < s.length && s[pos] != ',' && s[pos] != '}' && s[pos] != '{'){
w += s[pos];
pos++;
}
for(String r : ret){
next.add(r + w);
}
}
ret = next;
}
Collections.sort(ret);
String[] res = new String[ret.size()];
for(int i = 0;i < ret.size();i++){
res[i] = ret.get(i);
}
return res;
}
}
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