#include <stdio.h>

#define wielkosc 1001

int isletter(char c)
{
    if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
    {
        return 1;
    }
    return 0;
}

int stringlength(const char *str)
{
    for (int i = 0; ; i++)
    {
        if (str[i] == '\0')
        {
            return i;
        }
    }
}

int main()
{
    char str[wielkosc] = { '\0' };

    printf("Podaj wyrazenie : ");
    fgets(str, wielkosc, stdin);
    str[stringlength(str)] = '\0';

    int dlugosc = stringlength(str) - 1;

    int words = 0;
    int readingWord = 0;
    for (int i = 0; i < dlugosc; ++i)
    {
        if (readingWord == 0 && isletter(str[i]))
        {
            words++;
            readingWord = 1;
        }
        else if (readingWord == 1 && !isletter(str[i]))
        {
            readingWord = 0;
        }
    }

    printf("%d", words);

    return 0;
}