View Code of Problem 3924

#include<cstdio>
#include<cstring>
#include<cmath>
#include<iostream>
#include<algorithm>
using namespace std;
int main(){
	string a;
	getchar();
	cin>>a;
	int n=a.length();
	for(int i=0;i<n;i++){
		if(a[i]!=a[i+1])
		cout<<a[i];
	}
	return 0;
}