Advent of Code 2015 Advent of Code 2015 Requirements CMake 3.31 C++ Compiler (CLion) Solutions Time is measured in DEBUG mode Day Puzzle 1 Puzzle 2 Day 01 < 1 ms < 1 ms Day 02 4 ms 4 ms Day 03 8 ms 5 ms Day 04 1 s 39 s Day 05 3 ms 3 ms Day 06 210 ms* * 14 ms in RELEASE Mode