模拟

#include<bits/stdc++.h>
using namespace std;

string en[] = {"zero","one","two","three","four","five","six","seven","eight","nine"};
vector<string> ans;
long long sum;

int main(){
    // 防止数字过大，无法存下
    string num;
    cin >> num;
    // 特判num不为0
    if(num == "0") {
        cout << "zero";
        return 0;
    }
    for(int i = 0; i < num.size(); i++){
        sum += num[i] - '0';
    }
    while(sum != 0){
        int index = sum % 10;
        sum /= 10;
        ans.push_back(en[index]);
    }
    reverse(ans.begin(), ans.end());
    for(int i = 0; i < ans.size(); i++){
        cout << ans[i] << " ";
    }
    return 0;
}