题解 | #扭蛋机#

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
void Calculate(int inx, string& outchars) {
    if (inx == 0)return;
    if (inx % 2 == 0) {
        int x = inx / 2 - 1;
        outchars.push_back('3');
        Calculate(x, outchars);
    } else {
        int x = inx / 2;
        outchars.push_back('2');
        Calculate(x, outchars);
    }
}
void BL1() {
    int n;
    while (cin >> n) {
        string tempresult;
        Calculate(n, tempresult);
        reverse(tempresult.begin(), tempresult.end());
        cout << tempresult << endl;
    }
}
int main() {
    BL1();
}