View Code of Problem 80

#include<stdio.h>
#include<string.h>
int main()
{
	int a[100000];
	memset(a,0,sizeof(a));
	int sq=0;
	int n;
	while(1)
	{
		sq=0;
		scanf("%d",&n);
		if(n==0)
			break;
			memset(a,0,sizeof(a));
	int baoshu=0;
	int index=-1;
	while(sq<n-1)
	{
		for(int i=0;i<n&&sq<n-1;i=(i+1)%n)
		{
			if(a[i]==0)
			{
				baoshu++;
				if(baoshu==3)
				{
					sq++;
					a[i]=1;
					baoshu=0;
				}
			}
		}
	}
	for(int i=0;i<n;i++)
	{
		if(a[i]==0)
		{
			index=i;break;
		}		
	}
	printf("%d\n",index+1);
	}
	
	return 0;
}