xdoj报数出列

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	int n;
	int i, j, k;
	int flag = 1;
	int count = 0;
	int arr[5000] = { 0 };
	scanf("%d", &n);

	while (n > 3)
	{
		if (flag == 1)
		{
			for (j = 1, k = 1; j <= n; j++)
			{
				if (arr[j] != 1)
				{
					if (k % 2 == 0)
					{
						arr[j] = 1;
					}
					k++;
				}
			}
			flag = 0;
		}
		else if (flag == 0)
		{
			for (j = 1, k = 1; j <= n; j++)
			{
				if (arr[j] != 1)
				{
					if (k % 3 == 0)
					{
						arr[j] = 1;
					}
					k++;
				}
			}
			flag = 1;
		}
		for (j = 1; j <= n; j++)
		{
			if (arr[j] != 1)
				count++;
		}
		if (count <= 3)
			break;
		count = 0;
	}
	if(n > 3)
	{
		for (i = 1; i <= n; i++)
		{
			if (arr[i] != 1)
				printf("%d ", i);
		}
	}
	else
	{
		for(i = 1; i <= n; i++)
		{
			printf("%d ", i);
		}
	}
	return 0;
}