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- long long int a=170000;
- bool prime[a];
- memset (prime, true, a);
- prime[0] = false;
- prime[1] = false;
- long long int primes[a],i,j,x=0,pp,n,tc;
- for(i=0;i*i<a;i++)
- {
- if(prime[i]==true)
- {
- for(j=i*i;j<a;j+=i)
- prime[j]=false;
- }
- }
- for(pp=0;pp<a;pp++)
- {
- if(prime[pp]==true)
- {
- primes[x]=pp;
- x++;
- }
- }
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