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- #include <bits/stdc++.h>
- using namespace std;
- #define ll long long
- #define scl(n) scanf("%lld", &n)
- #define pcl(n) printf("%lld\n", n)
- #define pcl1(n) printf("%lld ", n)
- #define nln printf("\n")
- #define yes printf("YES\n")
- #define no printf("NO\n")
- #define dev(x) cout << #x << " " << x << " ";
- #define PTT pair<ll, ll>
- map<ll, ll> mp, mp1;
- map<ll, ll>::iterator itr;
- #define M 1000000
- bool marked[M];
- vector<ll> primeVector;
- bool isPrime(int n)
- {
- if (n < 2)
- return false;
- if (n == 2)
- return true;
- if (n % 2 == 0)
- return false;
- return marked[n] == false;
- }
- void sieve()
- {
- primeVector.push_back(2);
- for (ll i = 3; i * i <= M; i += 2)
- {
- if (marked[i] == false)
- { // i is a prime
- primeVector.push_back(i);
- for (ll j = i * i; j <= M; j += i + i)
- {
- marked[j] = true;
- }
- }
- }
- }
- int main()
- {
- sieve();
- for (int i = 0; i < primeVector.size(); i++)
- {
- cout << primeVector[i] << " ";
- }
- cout << isPrime(200) << endl;
- }
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