Advent of Code 2015 Advent of Code 2015 Requirements Kotlin 1.7.21 JDK 11 Gradle 7.6 (or use wrapper) Solutions Day Puzzle 1 Puzzle 2 Day 01 10-20 ms 10-15 ms Day 02 70-90 ms 75-95 ms Day 03 25-35 ms 50-65 ms Day 04 3 sec 77 sec Day 05 60-75 ms 60-80 ms Day 06 100-120 ms 120-150 ms