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- #include <bits/stdc++.h>
- using namespace std;
- ifstream f("perfect1.in");
- ofstream g("perfect1.out");
- int n,x,v[8130];
- bool div(int n)
- {
- int nr;
- for(int i=8128; n>1 && i>1; i--)
- {
- nr=0;
- while(v[i] && nr<v[i] && n%i==0)
- n/=i,nr++;
- }
- if(n==1)
- return 1;
- return 0;
- }
- int main()
- {
- f>>n;
- for(int i=1; i<=n; i++)
- f>>x,v[x]++;
- if(div(8128))
- g<<8128;
- else if(div(496))
- g<<496;
- else if(div(28))
- g<<28;
- else if(div(6))
- g<<6;
- else
- g<<"NU";
- return 0;
- }
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