例题 5-4 反片语

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#include<iostream>
#include<string>
#include<cctype>
#include<vector>
#include<map>
#include<algorithm>

using namespace std;

map<string,int> cnt;
vector<string> words;

string repr(const string& s){
	string ans=s;
	for(int i=0;i<ans.length();i++){
		ans[i]=tolower(ans[i]);
	sort(ans.begin(),ans.end());
	return ans;
	}
}
int main(){
	int n=0;
	string s;
	while(cin>>s){
		if(s[0]=='#') break;
		words.push_back(s);
		string r=repr(s);
		if(!cnt.count(r)) cnt[r]=0;
		cnt[r]++;
	}
	vector<string> ans;
	for(int i=0;i<words.size();i++)
		if(cnt[repr(words[i])]==1) ans.push_back(words[i]);
	sort(ans.begin(),ans.end());
	for(int i=0;i<ans.size();i++)
		cout<<ans[i]<<"\n";
	return 0;
}