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#include <stdio.h>
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int semiprime(int n)
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{
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int p, f = 0;
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for (p = 2; f < 2 && p*p <= n; p++)
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while (0 == n % p)
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n /= p, f++;
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return f + (n > 1) == 2;
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}
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int main(void)
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{
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int i;
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for (i = 2; i < 100; i++)
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if (semiprime(i)) printf(" %d", i);
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putchar('\n');
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return 0;
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}
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