Astea Solutions Adjusted String w/o Spaces

#include <iostream>
using namespace std;
#include <vector>
#include <bits/stdc++.h>


string char_vector_method(string input){   //using vectors
    vector<char> vec;
    int index = 0;
    while(index<input.size()){
        if(!isspace(input.at(index))){
            vec.push_back(input.at(index));
        }
        index++;
    }
    input = "";
    for(int i = 0; i<vec.size(); i++){
        input+=vec.at(i);
    }
    return input;
}

string string_count_method(string input){ //stl library
    int lenght = input.size(), counted = count(input.begin(), input.end(), ' ');
    remove(input.begin(), input.end(), ' ');
    input.resize(lenght - counted);
    return input;
}

int main(){
    string input;
    getline(cin, input);
    cout<<"Char arr method: "<<char_vector_method(input)<<endl;
    cout<<"Stl method: "<<string_count_method(input)<<endl;
}