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- #include <iostream>
- using namespace std;
- bool prim(int x)
- {
- int i;
- if(x==0 || x==1)
- return 0;
- if(x==2)
- return 1;
- if(x>2)
- {
- if(x%2==0)
- return 0;
- else
- for(i=3;i*i<=x;i+=2)
- if(x%i==0)
- return 0;
- }
- return 1;
- }
- bool aprim1(int x)
- {
- int i;
- for(i=2;i*i<x;++i)
- if(x%i==0)
- if(prim(i)&&prim(x/i))
- return 1;
- return 0;
- }
- int main()
- {
- int nr=0,i,n,j,k,x;
- cin>>n;
- for(i=1;i<=n;++i)
- {
- cin>>x;
- if(aprim1(x))
- ++nr;
- }
- cout<<nr;
- return 0;
- }
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