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Jan 27th, 2020
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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5. int t,n,i,j;
  6. cin>>t;
  7. for(i=1;i<=t;i++){
  8. cin>>n;
  9. vector<int>a(n);
  10. vector<int>vt(n);
  11.  
  12. for(j=0;j<n;j++){
  13. cin>>a[i];
  14. }
  15. vt[0]=a[0]*a[1];
  16. //cout<<vt[0]<<endl;
  17. vt[n-1]=a[n-1]*a[n-2];
  18. for(j=1;j<n-1;j++){
  19. vt[j]=a[j-1]*a[j+1];
  20. }
  21. for(j=0;j<n;j++)
  22. cout<<vt[j]<<" ";
  23. vt.clear();
  24. }
  25. return 0;
  26. }
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