#include <iostream>
#include <ctime>
#include <string>
std::string now()
{
std::time_t now= std::time(0);
std::tm* now_tm= std::gmtime(&now);
char buf[42];
std::strftime(buf, 42, "%Y%m%d %X", now_tm);
return buf;
}
int main(){ std::cout<< now()<< '\n'; }
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