// C++ program to print all primes smaller than or equal to // n using Sieve of Eratosthenes #include using namespace std; void SieveOfEratosthenes(long int n) { // Create a boolean array "prime[0..n]" and initialize // all entries it as true. A value in prime[i] will // finally be false if i is Not a prime, else true. bool prime[n+1]; memset(prime, true, sizeof(prime)); for (long int p=2; p*p<=n; p++) { // If prime[p] is not changed, then it is a prime if (prime[p] == true) { // Update all multiples of p for (long int i=p*2; i<=n; i += p) prime[i] = false; } } // Print all prime numbers long int count =0; for (long int p=2; p<=n; p++) if (prime[p]) count++; if(count%2==0) { cout<<"Bob"<>t; for(int i=0;i>n; // cout << "Following are the prime numbers smaller " // << " than or equal to " << n << endl; SieveOfEratosthenes(n); } return 0; }