Created
December 1, 2024 07:43
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2024 advent of code day 1
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| # first star | |
| input <- apply(read.delim("input.txt", sep = "", header = FALSE), 2, sort, decreasing = FALSE, simplify = FALSE) | |
| diffs <- mapply(function(x,y){abs(x-y)}, input[["V1"]], input[["V2"]]) | |
| sum(diffs) | |
| # second star | |
| mat <- matrix(input[["V1"]][match(input[["V2"]], input[["V1"]])]) | |
| sum(mat, na.rm = TRUE) |
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