Advent of Code 2023!

Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as interview prep, company training, university coursework, practice problems, a speed contest, or to challenge each other.

The first puzzles will unlock on December 1st at midnight EST (UTC-5).

Hello!

We would like to invite you to participate in the Replay of AUST CSE Carnival 1.0 Programming Contest. It will be held on February 2, 2023 at 7:00 PM GMT+6. You will be given 11 problems and 4 hours to solve them.

AUST CSE Carnival 1.0 was a week-long event held at Ahsanullah University of Science and Technology (AUST). The event was organized by AUST CSE Society.

Participants with rating less than 1900 might find the problems interesting and/or educational.

Good luck!

I submitted exactly the same code for 86D - Powerful array on different platforms. Here are the results:

• GNU C++17 : 165293098 -> 4086 ms (+0 KB)
• GNU C++17 (64): 165293845 -> 1152 ms (+4 KB)
• GNU C++20 (64): 165294370 -> 1122 ms (+8 KB)

There is a small increase in memory when using 64-bit, but the time difference is pretty huge!

Can anybody explain why?

The time limit per test 840D - Destiny is 2.5 seconds. But 157972351 passed in 3525 ms.

What's going on? ಠ_ಠ