generator

#include <algorithm>
#include <iostream>
#include <ctime>
#include <fstream>
#include <string>
#include <vector>

int main(int argc, char *argv[]) {
    const std::string smallalphabet = "ab";
    const std::string largealphabet = "qwer";
    srand(time(nullptr));
    const int SMALL_FILE_SIZE = 10000;
    const int LARGE_FILE_SIZE = 100000;
    std::ofstream smallfile("smallfile.txt");
    std::ofstream largefile("largefile.txt");
    std::ofstream patterns("patterns.txt");
    std::string smallstring;
    std::string largestring;
    for (int i = 0; i < SMALL_FILE_SIZE; ++i) {
        smallstring += smallalphabet[rand() % 2];
    }
    for (int i = 0; i < LARGE_FILE_SIZE; ++i) {
        largestring += largealphabet[rand() % 4];
    }
    smallfile << smallstring << std::endl;
    largefile << largestring << std::endl;
    for (int sz = 100; sz <= 3000; sz += 100) {
        int small_i = rand() % (SMALL_FILE_SIZE - sz);
        int large_i = rand() % (LARGE_FILE_SIZE - sz);
        patterns << smallstring.substr(small_i, sz) << "," <<
                    largestring.substr(large_i, sz) << std::endl;
    }
    return 0;
}