the first line contains an integer t !

Правка en1, от MOOONI, 2020-04-14 09:39:11

Hello, I've realized in new codeforces contests that in lots of problems the input starts with an integer t ! the number of test cases,
so what is it used for ? why not just one test case instead of lots of them ? does it make judgement easier ? in past this way of representing input was not common, so what happened ? if you know answer to my questions above please answer in the comments :)

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en1 Английский MOOONI 2020-04-14 09:39:11 444 Initial revision (published)