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