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40 lines
377 B
40 lines
377 B
#include<stdio.h>
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#include<math.h>
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int judge(int m)
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{
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int i,count=0;
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if(m<2)
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{
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return 0;
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}
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for(i=2;i<=sqrt(m);i++)
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{
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if(m%i==0)
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{
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count++;
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}
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}
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if(count==0)
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{
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return 1;
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}
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else
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{
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return 0;
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}
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}
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int main()
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{
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int n;
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scanf("%d",&n);
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if(judge(n)==1)
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{
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printf("Yes");
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}
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else
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{
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printf("No");
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}
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return 0;
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}
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