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//#define _CRT_SECURE_NO_WARNINGS
//#define MAX_STRING_LEN 1000
//
//#include <string>
//#include <iostream>
//#include <vector>
//#include <Windows.h>
//
//using namespace std;
//
//void get_string(char* str)
//{
//    fgets(str, MAX_STRING_LEN, stdin);
//    str[strcspn(str, "\n")] = '\0';
//}
//
//
//int main()
//{
//    SetConsoleCP(1251);
//    SetConsoleOutputCP(1251);
//
//    cout << "Введите исходную строку: ";
//
//    char* words = new char[MAX_STRING_LEN];
//    get_string(words);
//
//    char* new_words = new char[MAX_STRING_LEN];
//    new_words[0] = '\0';
//
//    char* word = strtok(words, " ");
//    char* endptr;
//    while (word != NULL)
//    {
//        double x = strtod(word, &endptr);
//        if (endptr == word)
//        {
//            new_words = strcat(new_words, word);
//            new_words = strcat(new_words, " ");
//        }
//        word = strtok(NULL, " ");
//    }
//    
//
//    cout << new_words;
//
//    delete[] new_words;
//    delete[] words;
//}
//
//
//#include <iostream>

#include <string>
#include <iostream>
#include <Windows.h>

using namespace std;

int word_end_index(string words, int start)
{
    int a = words.find(" ", start) - 1;

    if (a < 0)
        return words.size() - 1;
    return a;
}
int main()
{
    SetConsoleCP(1251);
    SetConsoleOutputCP(1251);

    cout << "Введите исходную строку: ";
    string words, new_words;
    getline(cin, words);

    for (int word_start = 0; word_start < words.size(); word_start++)
    {
        if (words[word_start] == ' ')
            continue;

        int word_end = word_end_index(words, word_start);
        int word_len = word_end - word_start + 1;
        string word = words.substr(word_start, word_len);

        char* endptr;
        double x = strtod(word.c_str(), &endptr);

        if (endptr != word.c_str() + word_len)
        {
            new_words += word + " ";
        }
        word_start = word_end;
    }
    cout << new_words;
}