Significance of ios_base::sync_with_stdio(false); cin.tie(NULL);
What is the significance of includingios_base::sync_with_stdio(false);cin.tie(NULL);in C++ programs?In my tests, it speeds up the execution time, but is there a test case I should be worried about by...
View ArticleAnswer by Don Wakefield for Significance of ios_base::sync_with_stdio(false);...
Using ios_base::sync_with_stdio(false); is sufficient to decouple the C and C++ streams. You can find a discussion of this in Standard C++ IOStreams and Locales, by Langer and Kreft. They note that how...
View ArticleAnswer by Jean-Baptiste Yunès for Significance of...
This is to synchronize IOs from C and C++ world. If you synchronize, then you have a guaranty that the orders of all IOs is exactly what you expect. In general, the problem is the buffering of IOs that...
View ArticleAnswer by Ionut for Significance of ios_base::sync_with_stdio(false);...
The two calls have different meanings that have nothing to do with performance; the fact that it speeds up the execution time is (or might be) just a side effect. You should understand what each of...
View ArticleAnswer by Sravya for Significance of ios_base::sync_with_stdio(false);...
It's just common stuff for making cin input work faster.For a quick explanation: the first line turns off buffer synchronization between the cin stream and C-style stdio tools (like scanf or gets) — so...
View ArticleAnswer by Ashish Yadav for Significance of ios_base::sync_with_stdio(false);...
There are lots of great answers. I just want to add a small note about decoupling the stream.cin.tie(NULL);I have faced an issue while decoupling the stream with the CodeChef platform. When I submitted...
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