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| -rw-r--r-- | tools/aoc2019/solution-day1.el | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tools/aoc2019/solution-day1.el b/tools/aoc2019/solution-day1.el new file mode 100644 index 000000000000..d805c22ec870 --- /dev/null +++ b/tools/aoc2019/solution-day1.el @@ -0,0 +1,28 @@ +;; Advent of Code 2019 - Day 1 +(require 'dash) + +;; Puzzle 1: + +(defvar day-1/input + '(83285 96868 121640 51455 128067 128390 141809 52325 68310 140707 124520 149678 + 87961 52040 133133 52203 117483 85643 84414 86558 65402 122692 88565 61895 + 126271 128802 140363 109764 53600 114391 98973 124467 99574 69140 144856 + 56809 149944 138738 128823 82776 77557 51994 74322 64716 114506 124074 + 73096 97066 96731 149307 135626 121413 69575 98581 50570 60754 94843 72165 + 146504 53290 63491 50936 79644 119081 70218 85849 133228 114550 131943 + 67288 68499 80512 148872 99264 119723 68295 90348 146534 52661 99146 95993 + 130363 78956 126736 82065 77227 129950 97946 132345 107137 79623 148477 + 88928 118911 75277 97162 80664 149742 88983 74518)) + +(defun calculate-fuel (mass) + (- (/ mass 3) 2)) + +(message "Solution to day1/1: %d" (apply #'+ (-map #'calculate-fuel day-1/input))) + +;; Puzzle 2: +(defun calculate-recursive-fuel (mass) + (let ((fuel (calculate-fuel mass))) + (if (< fuel 0) 0 + (+ fuel (calculate-recursive-fuel fuel))))) + +(message "Solution to day1/2: %d" (apply #'+ (-map #'calculate-recursive-fuel day-1/input))) |