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Jul 27th, 2016
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  1. #include<cstdio>
  2. #include<iostream>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. long s,d;
  8. while(cin>>s>>d)
  9. {
  10. long sum=0;
  11. for(long i=s;;i++)
  12. {
  13. sum+=i;
  14. if(sum>=d)
  15. {
  16. cout<<i<<endl;
  17. break;
  18. }
  19. }
  20. }
  21. return 0;
  22. }
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