思路：模擬除法運算

#include <bits/stdc++.h>
using namespace std;
int main(){
	int num;
	int temp = 0,cnt = 0;
	string s = "";
	cin >> num;
	do{
		cnt++;
		temp = temp * 10 + 1;
		s.append(1,'0' + (temp / num));
		temp = temp % num;
	}while(temp > 0);
	for(int i = 0;i < s.size();i++){
		if(s[i] != '0'){
			for(int j = i;j < s.size();j++){
				cout<<s[j];
			}
			break;
		}
	}
	cout << " " << cnt << endl;
	return 0;
}