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#include<stdio.h>
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int main()
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{
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int a=0;//<2F>ж<EFBFBD>p<EFBFBD><70><EFBFBD><EFBFBD><EFBFBD>Ӹ<EFBFBD><D3B8><EFBFBD>
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int p;
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int i;
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scanf("%d",&p);
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for(i=2;i<p;i++)
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{
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if(p%i==0)
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a++;
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}
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if(a==0)
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printf("%d is a prime\n",p);
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else
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printf("%d is not a prime\n",p);
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return 0;
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}
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