1489.cpp

zju_acm部分代码！都是自己做 有些事基本题目！题目还可以

#include <cstdio>
#include <math.h>

int main()
{
	int n;
	while(scanf("%d",&n)==1)
	{
		int j=1,t=1;
		if(n%2!=0&&n!=1)
		{	while(1)
			{	
					t=t*2;
				t=t%n;
				if(t==1)
				{
					printf("2^%d mod %d = 1\n",j,n);
					break;
				
				}
				j++;


			}//while
		}else{printf("2^? mod %d = 1\n",n);}
	}

	return 0;
}