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- #include <iostream>
- #include <cstring>
- using namespace std;
- int prim(int n)
- {
- for (int i=2;i<=(n/2)+1;i++)
- if (n%i == 0)
- return 0;
- return 1;
- }
- int numar(int x, int nrp, int y)
- {
- for (int i=y;i<=x;i++)
- if (prim(i))
- nrp++;
- return nrp;
- }
- int main()
- {
- int a,b;
- cin>>a>>b;
- if (numar(b,0,a) > 1)
- cout<<"DA";
- else
- cout<<"NU";
- return 0;
- }
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