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jakaria_hossain

codeforce - pillars

Jul 23rd, 2019
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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main()
  4. {
  5. int n,i;
  6. cin>>n;
  7. int ara[n+1],m=0;
  8. for(i=0; i<n; i++)
  9. {
  10. cin>>ara[i];
  11. }
  12. for(i=0; i<n; i++)
  13. if(ara[i]>ara[m])
  14. m=i;
  15. for(i=m; i>0; i--)
  16. {
  17. if(ara[i]<ara[i-1])
  18. {
  19. cout<<"no"<<endl;
  20. return 0;
  21. }
  22. }
  23. for(i=m; i<n-1; i++)
  24. {
  25. if(ara[i]<ara[i+1])
  26. {
  27. cout<<"no"<<endl;
  28. return 0;
  29. }
  30. }
  31. cout<<"yes"<<endl;
  32. }
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