iostream

“std::endl” vs “\n”

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The varying line-ending characters don’t matter, assuming the file is open in text mode, which is what you get unless you ask for binary. The compiled program will write out the correct thing for the system compiled for. The only difference is that std::endl flushes the output buffer, and ‘\n’ doesn’t. If you don’t want … Read more

Why is reading lines from stdin much slower in C++ than Python?

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tl;dr: Because of different default settings in C++ requiring more system calls. By default, cin is synchronized with stdio, which causes it to avoid any input buffering. If you add this to the top of your main, you should see much better performance: std::ios_base::sync_with_stdio(false); Normally, when an input stream is buffered, instead of reading one … Read more