#include <iostream>
#include <sstream>
#include <string>
#include <iomanip>
 
std::string padZeroIP(const std::string &str)
{
    std::istringstream iss(str);
    std::ostringstream oss;
 
    std::string token;
    bool first = true;
 
    while (std::getline(iss, token, '.'))
    {
        if (first)
            first = false;
        else
            oss << '.';
 
        int oct = std::stoi(token);
        oss << std::setw(3) << std::setfill('0') << oct;
    }
 
    return oss.str();
}
 
int main()
{
	std::cout << padZeroIP("192.168.0.1");
	return 0;
}

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