质因数分解

 1 //质因数分解
 2 #include<cstdio>
 3 #include<cstdlib>
 4 #include<cstring>
 5 #include<iostream>
 6 #include<algorithm>
 7 #include<queue>
 8 #include<cmath>
 9 using namespace std;
10 int top=0,num[10000],time[10000];
11 void fj(int n)
12 {
13     top=0;
14     memset(num,0,sizeof(num));
15     memset(time,0,sizeof(time));
16     for(int i=2;i<=sqrt(n);i++)
17     {
18         if(n%i==0)
19         { 
20             top++;
21             n/=i;
22             num[top]=i;
23             time[top]++;
24             while(n%i==0)
25             {
26                 n/=i;
27                 time[top]++;
28             }
29         }
30     }
31     if(n>1) {
32         top++;
33         num[top]=n;
34         time[top]++;
35     }
36 }
37 int main()
38 {
39     freopen("1.in","r",stdin);
40     freopen("1.out","w",stdout);
41     int n;
42     cin>>n;
43     fj(n);
44     for(int i=1;i<=top;i++)
45     {
46         cout<<num[i]<<" "<<time[i]<<endl;
47     }
48     return 0;
49 }