A div B

#include<iostream>
#include<fstream>
#include<string>
#define all(container) container.begin(), container.end()
#define fors(counter, start, finish) for (int counter = start; counter < finish; ++counter)
#define forb(counter, start, finish) for (int counter = start; counter >= finish; --counter)
#define vec(type) std::vector<type>
#define dvec(type) std::vector<std::vector<type>>

int main() {

    std::ifstream fin("input.txt");
    std::string s;
    int n;
    fin >> s >> n;

    int i = 0, a = 0;
    std::string ans;
    while (i < s.size()) {
        bool f = false;
        while (a < n && i < s.size()) {
            a *= 10; a += s[i] - '0';
            ++i;
            if (f)
                ans.push_back('0');
            f = true;
        }
        ans.push_back(a / n + '0');
        a %= n;
    }
    int idx = 0;
    while (ans[idx] == '0')
        idx++;

    std::cout << ans.size() << std::endl;
    std::cout << ans.substr(idx, ans.size() - idx) << std::endl;
    return 0;
}