View Code of Problem 80

#include <stdio.h>
int a[1000];
int main()
{
	int n,i,j,count,flag;
	while(scanf("%d",&n),n!=0)
	{
		count=n;
		flag=0;
		for(i=1;i<=n;i++)
			a[i]=1;
		while(count>1)
		{
			for(j=1;j<=n;j++)
			{
				if(a[j])
				{
					flag++;
					if(flag%3==0)
					{
						a[j]=0;
						count--;
					}
				}
			}
		}
		for(i=1;i<=n;i++)
			if(a[i])
			{
				printf("%d\n",i);
				//break;
			}
	}
	return 0;
}