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- #include<iostream>
- using namespace std;
- int main()
- {
- long long int suma=0;
- bool klawa[2000000];
- for(long long int i=2;i<2000000;i++)
- {
- klawa[i]=1;
- }
- for(int i=2;i<1415;i++)
- {
- if(klawa[i]==1)
- {
- for(int j=i*i;j<2000000;j+=i)
- {
- klawa[j]=0;
- }
- }
- }
- for(long long int i=2;i<2000000;i++)
- {
- if(klawa[i]==1)
- {
- suma+=i;
- }
- }
- cout<<suma;
- return 0;
- }
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