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Jan 25th, 2020
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C++ 0.19 KB | None | 0 0
  1. bool is_primary(int n) {
  2.     if (n < 2) return false;
  3.     if (n == 2) return true;
  4.     for (int i = 2; i <= n / 2; i++) {
  5.         if (n % i == 0) return false;
  6.     }
  7.     return true;
  8. }
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