Submission

PPPPPPPPPP

Score: 100

User: mistertfy64

Problemset: จำนวนเฉพาะ (2560)

Language: cpp

Time: 0.003 second

Submitted On: 2024-10-12 20:19:44

#include <bits/stdc++.h>
using namespace std;

bool is_prime(int x) {
  if (x <= 1) {
    return false;
  }
  if (x == 2) {
    return true;
  }
  if (x % 2 == 0) {
    return false;
  }
  for (int i = 3; i * i <= x; i += 2) {
    if (x % i == 0) {
      return false;
    }
  }
  return true;
}

int main() {
  int n;
  cin >> n;
  for (int i = 1; i < n; i++) {
    if (is_prime(i)) {
      cout << i << "\n";
    }
  }
  return 0;
}