#include <iostream>
#include <string>
using namespace std;

int convert(string & x, int digit = 0, size_t place = 0)
{
    if (place >= x.size())
        return 0;
    if (digit == 0)
        return x[x.size() - place - 1] - '0' + convert(x, 10, place + 1);
    else
        return (x[x.size() - place - 1] - '0') * digit + convert(x, digit * 10, place + 1);
}

int main()
{
    string x = "255";
    int z = convert(x);
    cout << z + 1 << endl;
}

256