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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int n=25,i,j;
- int p[25];
- for(i=0;i<n;i++)
- p[i]=1;
- int q=sqrt(n);
- p[0]=0;
- p[1]=0;
- for(i=2;i<q;i++)
- {
- if(p[i]==1)
- {
- for(j=2;i*j<=n;j++)
- p[i*j]=0;
- }
- }
- for(i=0;i<n;i++)
- {
- if(p[i]==1)
- cout<<i<<" ";
- }
- }
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