View Code of Problem 3924

/*
牌王找不同*/
#include<cstdio>
#include <iostream>
using namespace std;
int main(){
	string s;
	cin>>s;
	s.push_back('&');
	for(int i=0;i<s.size()-1;i++){
		if(s[i]!=s[i+1]){
			printf("%c",s[i]);
		}
	}


}