UVa - 10494 - If We Were a Child Again

#include <iostream>
#include <string>
#include <vector>
using namespace std;
int main(){
    long long mod_ans, mod, n, div, temp, m;
    string arbitrary;
    vector <long long>  div_ans;
    char sign;
    while(cin >> arbitrary >> sign >> n){
        int l = arbitrary.size();
        mod = 0;
        m = 0;
        for(int i = 0; i < l; i++){
            temp = (mod * 10) + (arbitrary[i]-48);
            mod = ((mod * 10) + (arbitrary[i]-48)) % n; mod_ans = mod;
            if(m == 1 && temp < n)div_ans.push_back(0);
            if(temp >= n){
                div = temp / n;div_ans.push_back(div);
                m = 1;
            }
        }
        if(sign == '/' && m == 1){
            int z = div_ans.size();
            for(int i = 0; i < z; i++)cout << div_ans[i];
            cout << endl;
        }
        else if(sign == '/' && m == 0)cout << 0 << endl;
        else if(sign == '%')cout << mod_ans << endl;
        div_ans.clear();
    }
    return 0;
}