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@audrl1010
Created June 20, 2018 05:51
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소수 판별법
public boolean isPrime(int n) {
  if (n <= 1) { return false; }
  int last = n / 2;
  for(int prime = 2; prime <= last; prime++) {
    if(n % prime == 0) {
      return false;
    }
  }
  return true;
}
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