// convert from base 5 digits to pure number
/*
string "23410"

int, unsigned: same size - 32 bits == 4 bytes
unsigned:

*/

#include <iostream>
#include <string>
#include <climits>
using namespace std; // cin cout // std::cin std ::cout

    // e.g. numberFromDigits5("2314") returns 334
unsigned numberFromDigits5(string digits);
string digitsFromNumber5(unsigned n);

int main() {
    int n = 2147483647;
    cout << n << endl;
    ++n;
    cout << n << endl;
    string s;
    s = "blah";
    // s.size(): 4
    cout << s[0]; // b
    cout << s[3] << endl; // h
    unsigned i;
    for (i = 0; i != s.size(); ++i)
        cout << " " << s[i];
    cout << endl;
    for (i = s.size() - 1; i != UNIX_MAX; --i)
        cout << "/" << s[i];
    cout << endl;
} // main


unsigned numberFromDigits5(string digits) {
    unsigned ret = 0;
    unsigned i;
    for (i = 0; i < digits.size(); ++i)
        ret = 5*ret + digits[i];
}

string digitsFromNumber5(unsigned n) {

}