View Code of Problem 3924

#include <algorithm>
#include <cctype>
#include <climits>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <map>
#include <set>
#include <stack>
#include <string>
#include <vector>
using namespace std;

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