Question

Ma poate ajuta cineva cu un model de algoritm care afiseaza numarul cifrelor care apar o singura data intr-un numar?

Answer 1

#include <iostream>
#include <string>
#include <numeric>
#include <algorithm>

int main()
{
    std::string nr;
    std::cin >> nr;
    std::cout << std::accumulate(std::begin(nr), std::end(nr), 0, [nr] (int init, char cfr) {
          return init + (std::count(std::begin(nr), std::end(nr), cfr) == 1);
    });
}