#include <iostream>
#include <sstream>
#include <stdlib.h>
#include <string>
using namespace std;

string inventory(string n)
{
	stringstream ss;
	int temp[10] = {0};
	int j = 0;
	for (int i = 0; i < n.length(); ++i)
	{
		j = n[i]- 48;
		temp[j] +=1;
	}
	for (int i = 0; i < 10; ++i)
	{
		if (temp[i]>0){
			ss << 10*temp[i] + i;
		}			
	}
	return ss.str();
}
int main(){
	string s,inventory_s;
	string inventory_list[15];
	while (cin >> s)
	{
		inventory_s = "";
		bool flag = false;
		if (s != "-1")
		{
			cout << s;
			for (int i = 0; i < 15; i++)
			{				
				inventory_list[i] = s;
				s = inventory(s);
				for (int j = 0; j <= i; j++)
				{
					if (s == inventory_list[j])
					{
						if (i == j && j == 0)
							printf(" is self-inventorying");
						else if (i == j && j > 0)
							printf(" is self-inventorying after %d steps", j);
						else
							printf(" enters an inventory loop of length %d ", (i-j+1));
						flag = true;
						break;
					}
				}
				if (flag) 
					break;
				else if (i==14)
					cout << " can not be classified after 15 iterations";
			}
		}			
		cout << endl;
	}
	system("pause");
	return 0;
}

• Re:C++参考 (1327) xsyyds 2022-10-06 10:51:36