View Code of Problem 3924

#include<stdio.h>
#include<iostream>
#include<cstdlib>
#include<cstdio>
#include<cstring>
#include<string>
#include<algorithm>
#include<vector>
#include<cmath>
#include<stack>
using namespace std;

int main() {
	string str;
	cin >> str;
	for (int i = 0; i < str.size(); i++) {
		if (str[i] != str[i + 1]) {
			cout << str[i];
		}
		if (i == str.size()) {
			cout << endl;
		}
	}
	return 0;
}