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// Standard C++
#include <array>
#include <fstream>
#include <iostream>
#include <string>
// Standard C
#include <cstring>
// System
#include <md5.h>
using namespace std;
void
brute_force(string_view puzzle, size_t length)
{
array<char, MD5_DIGEST_STRING_LENGTH> digest{};
string input;
for ( unsigned long counter = 0;; ++counter ) {
input = puzzle;
input += to_string(counter);
MD5Data(input.data(), input.size(), digest.data());
if ( memcmp(digest.data(), "00000000000", length) == 0 ) {
cout << digest.data() << ": " << counter << endl;
return;
}
}
}
void
part1(string_view puzzle)
{
brute_force(puzzle, 5);
}
void
part2(string_view puzzle)
{
brute_force(puzzle, 6);
}
int
main()
{
string puzzle = "yzbqklnj";
part1(puzzle);
part2(puzzle);
}
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