Saleh127

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Apr 12th, 2020
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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. int main()
  5. {
  6. ll b,c=0,d=0,e=0,i,j,k;
  7. scanf("%lld",&b);
  8. for(i=1; i<=b; i++)
  9. {
  10. for(j=1; j<=b; j++)
  11. {
  12. for(k=1; k<=b; k++)
  13. {
  14. c+=__gcd(i,__gcd(j,k));
  15. }
  16. }
  17. }
  18. printf("%lld\n",c);
  19. return 0;
  20. }
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