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- #include <fstream>
- using namespace std;
- int F[8129];
- bool div(int n)
- {
- int nr;
- for(int i=8128;n>1&&i>1;--i)
- {
- nr=0;
- while(F[i]&&nr<F[i]&&n%i==0)
- n/=i,++nr;
- }
- if(n==1)
- return true;
- return false;
- }
- int main()
- {
- int n;
- ifstream f("perfect1.in");
- f>>n;
- int x;
- for(int i=1;i<=n;++i)
- f>>x,++F[x];
- ofstream g("perfect1.out");
- if(div(8128))
- {
- g<<8128;
- return 0;
- }
- if(div(496))
- {
- g<<496;
- return 0;
- }
- if(div(28))
- {
- g<<28;
- return 0;
- }
- if(div(6))
- {
- g<<6;
- return 0;
- }
- g<<"NU";
- return 0;
- }
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