#include <iostream>
#include <string>
using namespace std;

int main()
{
    size_t i, j, len;
    string str, str2;

    cout << "Enter string: ";
    getline(cin, str);

    len = str.length();
    str2.reserve(len);

    for(i = 0; i < len; ++i)
    {
        char ch = str[i];
        if (ch != ' ')
            str2 += ch;
    }

    cout << str2 << endl;

    //system("pause");
    return 0;
}