43 lines
932 B
C++
43 lines
932 B
C++
#include <algorithm>
|
|
#include <cassert>
|
|
#include <iostream>
|
|
#include <set>
|
|
#include <string>
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
using MD5Digest = unsigned char[EVP_MAX_MD_SIZE];
|
|
|
|
unsigned int md5(MD5Digest digest, std::string const& s)
|
|
{
|
|
EVP_MD const* md{EVP_md5()};
|
|
unsigned int md_len;
|
|
|
|
EVP_MD_CTX* md_ctxt{EVP_MD_CTX_new()};
|
|
assert(md_ctxt != NULL);
|
|
EVP_DigestInit_ex2(md_ctxt, md, NULL);
|
|
EVP_DigestUpdate(md_ctxt, s.data(), s.length());
|
|
EVP_DigestFinal_ex(md_ctxt, digest, &md_len);
|
|
return md_len;
|
|
}
|
|
|
|
bool is_valid(std::string const& s)
|
|
{
|
|
MD5Digest digest;
|
|
auto len = md5(digest, s);
|
|
assert(len >= 3);
|
|
return digest[0] == 0 && digest[1] == 0 && (digest[2] & 0xf0) == 0;
|
|
}
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
for (std::string line; std::getline(std::cin, line);) {
|
|
unsigned i = 0;
|
|
while (!is_valid(line + std::to_string(i))) {
|
|
++i;
|
|
}
|
|
std::cout << "Value = " << i << "\n";
|
|
}
|
|
|
|
return 0;
|
|
} |