View Code of Problem 3924

#include<cstdio>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<cstring>
#include<vector>
#include<map>
#include<string>
#include<set>
using namespace std;
int main(){
    string s;
    cin>>s;
    int l=s.length();
    for(int i=0;i<l;i++)
    {
        if(i>0&&s[i]==s[i-1])continue;
        cout<<s[i];
    }
    cout<<endl;
    return 0;
}