Submission #1172488

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Source Code Expand

#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<string>
#include<sstream>
#include<cmath>
#include<numeric>
using namespace std;
vector<bool> isPrime(long long int n){
  vector<bool> prime(n+1, true);
  prime[0] = false;
  prime[1] = false;
  for(long long int i=2; i<=sqrt(n); i++){
    if( !prime[i] ) continue;
    for(long long int j=i*2; j<=n; j+=i){
      prime[j] = false;
    }
  }
  return prime;
}
int main(){

  int n;
  cin >> n;

  vector<bool> b = isPrime(n);
  cout << ( b[n] ? "YES" : "NO" ) << endl;

  return 0;
}

Submission Info

Judge Result