uva-10392-因数分解

#include<stdio.h>
#include<iostream>
#include<queue>
#include<memory.h>
#include <math.h>
#include<time.h>
#include <stdlib.h>
using namespace std;

const int MAX = 10000 * 100;
const int MAXL = 10000 * 100;
/**
 * 欧拉素数筛选法
 */
int prime[MAX];
int np = 0;
void primes()
{
    memset(prime, -1, sizeof(prime));
    for(int i = 2; i <= MAXL; i++)
    {
        if(prime[i] == -1)
            prime[np++] = i;
        for(int j = 0; j < np && prime[j] * i <= MAXL; j++)
        {
            if(prime[j] * i >= MAXL)
            {
                break;
            }
            prime[prime[j] * i] = 0;
            if(i % prime[j] == 0)
                break;
        }
    }
}
int main()
{
    freopen("d:\\1.txt", "r", stdin);
    primes();
    long long l;
    bool first = true;
    while (cin >> l)
    {
        if(l == -1)
            return 0;
        for(int i = 0; i < np && prime[i] <= l; i++)
        {
            while (l % prime[i] == 0)
            {
                l = l / prime[i];
                printf("    %d\n", prime[i]);
            }
        }
        if(l != 1)
        {
            printf("    %lld\n", l);
        }
        cout << endl;
    }
    return 0;
}