pku2191.cpp

这是ACM 方面的资料 是PKU的 北京大学的出来的

int main()
{
	char s[9][100]={
		"23 * 89 = 2047 = ( 2 ^ 11 ) - 1",
		"47 * 178481 = 8388607 = ( 2 ^ 23 ) - 1",
		"233 * 1103 * 2089 = 536870911 = ( 2 ^ 29 ) - 1",
		"223 * 616318177 = 137438953471 = ( 2 ^ 37 ) - 1",
		"13367 * 164511353 = 2199023255551 = ( 2 ^ 41 ) - 1",
		"431 * 9719 * 2099863 = 8796093022207 = ( 2 ^ 43 ) - 1",
		"2351 * 4513 * 13264529 = 140737488355327 = ( 2 ^ 47 ) - 1",
		"6361 * 69431 * 20394401 = 9007199254740991 = ( 2 ^ 53 ) - 1",
		"179951 * 3203431780337 = 576460752303423487 = ( 2 ^ 59 ) - 1"
	};
	
	int n,l,i;
	
	while(scanf("%d",&n)!=-1)
	{

	if(n<=10) l=0;
	else if(n<=22) l=1;
	else if(n<=28) l=2;
	else if(n<=36) l=3;
	else if(n<=40) l=4;
	else if(n<=42) l=5;
	else if(n<=46) l=6;
	else if(n<=52) l=7;
	else if(n<=58) l=8;
	else l=9;
	
	for(i=0;i<l;i++)
	{
		printf("%s\n",s[i]);	
	}
	printf("\n");	
	}
	return 0;
}