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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main(){
  4. long long a;
  5. cin>>a;
  6. long long t=0;
  7. for(int i=0;i<=a;i++){
  8. if(i%9==0)
  9. t+=i;
  10. }
  11. cout<<t;
  12. return 0;
  13. }
Success #stdin #stdout 0.01s 5324KB
stdin
27
stdout
54