Unordered_map vs Policy Based Data Structure Issue

Revision en1, by dx24816, 2018-12-10 06:07:21

Hello,

Recently, I was doing Cow Run (http://www.usaco.org/index.php?page=viewproblem2&cpid=265), and I at first used the Policy Based Data Structure faster map (https://codeforces.me/blog/entry/60737), but I TLE'd on the last 4 test cases. I then switched back to using the unordered_map, and I passed all the test cases. Can anyone tell me the reason why the unordered_map was faster? I was under the impression that the PBDS map was faster. Thanks!

Code with unordered_map: https://ideone.com/Id7SZM Code using PBDS map: https://ideone.com/sA4UJG

To run this code, simply submit them in a file to the USACO website above, and use C++11.

-dx24816

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en1 English dx24816 2018-12-10 06:07:21 712 Initial revision (published)