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C++14 vs 11: IO speed with cin/cout?
Difference between en1 and en2, changed 18 character(s)
It seems that in C++11, even with the standard `ios::sync_with_stdio(0), cin.tie(0);` hacks, has significantly slower I/O with cin/cout than C++14.↵
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View these submissions:↵
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- cin/cout && C++11: 2963ms [here](http://codeforces.net/contest/980/submission/38122018)↵
  ↵
- cin/cout && C++14: 1934ms [here](http://codeforces.net/contest/980/submission/38122027)↵
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With scanf/printf, this issue isn't there:↵
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- scanf/printf && C++11: 2027ms [here](http://codeforces.net/contest/980/submission/38121980)↵
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- scanf/printf && C++14: 1887ms [here](http://codeforces.net/contest/980/submission/38121992)  ↵
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I was unaware of this. Does anybody have any explanations? Am I missing something specific about my submissions?↵
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Thanks [user:tonynater,2018-05-11] for the discussion.

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en2 English Chilli 2018-05-11 22:24:20 18 (published)
en1 English Chilli 2018-05-11 22:11:46 794 Initial revision (saved to drafts)