#include <iostream>

#include <cctype>

#include <random>

int randint(int n1, int n2, int total, std::vector<int>& vec)

{

std::random_device os_seed;

const uint_least32_t seed = os_seed();

std::mt19937 generator( seed );

std::uniform_int_distribution< uint_least32_t > distribute( n1, n2 );

for( int repetition = 0; repetition < total; ++repetition ) {

int k = distribute( generator );

vec.push_back(k);

}

return 0;

}

std::string idGenerator(int upsample, int length)

{

std::string character = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890abcdefghijklmnopqrstuvwxyz1234567890";

std::vector<int> vec1;

randint(0, character.size() - 1, upsample, vec1);

std::string database = "";

for (int i = 0; i < vec1.size(); i++) {

database += character[vec1[i]];

}

std::vector<int> vec2;

randint(0, upsample, length, vec2);

std::string output = "";

for (int i = 0; i < vec2.size(); i++) {

output += database[vec2[i]];

}

return output;

}

int main( void )

{

std::string id = idGenerator(800, 32);

std::cout << id << std::endl;

return 0;

}