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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. #define N 10000
  5. vector<bool>sieve(N,true);
  6. vector<ll>prime_no;
  7.  
  8. void prime_sieve(){
  9.  
  10. 	sieve[0]=sieve[1]=false;
  11.  
  12. 	for(auto i=2;i<=N;i++){
  13. 		if(sieve[i]){
  14. 		prime_no.push_back(i);
  15. 		for(auto j=i*i;j<=N;j+=i){
  16. 		sieve[j]=false;
  17. 		}
  18. 		}
  19. 	}
  20. }
  21. int main() {
  22. 	prime_sieve();
  23. 	ll n;
  24. 	cin>>n;
  25. 	cout<<prime_no[n-1];
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 4432KB
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https://ideone.com/4sbCVn
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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