POJ-1318（list.sort()输出不为字典序，map才是按字典序排列）

#include<iostream>
#include<string>
#include<list>
#include<map>
#include<utility>
#include<algorithm>
using namespace std;

map<string,int> outputMap;

void ergodic(string prefix, string str){
	if(str==""){
		outputMap.insert(pair<string,int>(prefix,0));
	}else{
		for(int i=0;i<str.length();i++){
			ergodic(prefix+str[i],str.substr(0,i)+str.substr(i+1,str.length()));
		}
	}
}

int main(int argc, char *argv[]){
	string str;
	list<string> inputList;
	while(cin>>str,str!="XXXXXX"){
		inputList.push_back(str);
	}

	while(cin>>str,str!="XXXXXX"){
		bool isUnscramble=false;
		outputMap.clear();
		ergodic("",str);
		for(map<string,int>::iterator iter=outputMap.begin();
				iter!=outputMap.end();
				++iter){
			if(find(inputList.begin(),inputList.end(),iter->first)!=inputList.end()){
				cout<<iter->first<<endl;
				isUnscramble=true;
			}
		}

		if(!isUnscramble){
			cout<<"NOT A VALID WORD"<<endl;
		}
		cout<<"******"<<endl;
	}

	return 0;
}