杭電 HDU 1164 Eddy's research I

Eddy's research I

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 7117 Accepted Submission(s): 4268


Problem Description Eddy's interest is very extensive, recently he is interested in prime number. Eddy discover the all number owned can be divided into the multiply of prime number, but he can't write program, so Eddy has to ask intelligent you to help him, he asks you to write a program which can do the number to divided into the multiply of prime number factor .


Input The input will contain a number 1 < x<= 65535 per line representing the number of elements of the set.

Output You have to print a line in the output for each entry with the answer to the previous question.

Sample Input

11
9412

Sample Output

11
2*2*13*181

Author eddy 重點是素數判定

#include
#include
using namespace std;
int prime[65536]={0};

    
int main()
{
	for(int i=2;i<=(65535/2);i++)
	{
		int q;
		for( q=i+i;q<=65535;q+=i)
		prime[q]=1;

   }
	int ls[10000];int n;int gq[100];
	
	while(cin>>n)
	{
		int t=0;
		for(int j=2;j<=65535;j++)
		{
			if(!prime[j]&&!(n%j))
			{
				ls[t++]=j;
			    n/=j;
				if(n==1)
				break;
			}
			if(n<=j)
		
			j=1;
	}
	
	sort(ls,ls+t);
	for(int k=0;k