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- #include <stdio.h>
- int main()
- {
- int k;
- for (k = 2; k < 200000; k++)
- {
- if (isPrime(k))
- {
- printf("X");
- } else {
- printf("O");
- }
- }
- }
- int isPrime(int number)
- {
- int i;
- for (i = 2; i < number; i++ )
- {
- if (number % i == 0)
- {
- return 0;
- }
- }
- return 1;
- }
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