PTA - L1-033 出生年

#include <set>
#include <iostream>
#include <iomanip>
using namespace std;

int InNum = 0;
int Same_Num = 0;
int Get_Same_Num(int);
int OutAge = 0;

int main()
{
	cin >> InNum >> Same_Num;

	for (size_t i = InNum; ; ++i)
	{
		if (Get_Same_Num(i) != Same_Num)
		{
			OutAge += 1;
		}
		else
		{
			cout << OutAge << " " << setw(4) << setfill('0') << i << endl;
			break;
		}
	}

	return 0;
}

int Get_Same_Num(int num)
{
	set<int> Every_Bit;
	Every_Bit.insert(num / 1000);

	while (num != 0)
	{
		Every_Bit.insert(num % 10);
		num /= 10;
	}

	return Every_Bit.size();
}