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#include<stdio.h> #include<math.h> int nt(int n){ for (int i=2;i<=sqrt(n);i++){ if (n%i==0){ return 0; } } return n>1; } int main(){ int n,a[100]; int dem; scanf("%d",&n); for (int i=1;i<=n;i++){ scanf("%d",&a[i]); } for (int i=1;i<=n;i++){ if (nt(a[i])!=0){ dem++; } } printf("%d ",dem); for (int i=1;i<=n;i++){ if (nt(a[i])!=0){ printf("%d ",a[i]); } } return 0; }
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