#include "stdafx.h"
#include<set>
#include<string>
#include<iostream>
using namespace std;

int main()
{
	set<string> s;
	char buf[1000]={0};

	gets(buf);
	char* p=buf;
	while(*p!=0)
	{
		if(*p==',' || *p=='.')
		{
			*p=' ';
		}
		p++;
	}
	p=strtok(buf," ");
	
	while(p!=NULL)
	{
		string tmp=p;
		if(s.find(tmp)==s.end())
		{
			cout<<tmp<<" ";
			s.insert(tmp);
		}
		p=strtok(NULL," ");
	}

	cout<<endl;
	return 0;    
}

2015年校招--华为上机笔试题--去重复单词