Can you please tell me what's the difference is between `cin.tie(0)`, `cin.tie(NULL)` and `cin.tie(nullptr)`? Also, why no one talks about `cout.tie()`?↵
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**UPD1** Why is `cout.tie()` useless? I thought it reduces the time of the output
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**UPD1** Why is `cout.tie()` useless? I thought it reduces the time of the output



