Created
December 3, 2024 07:56
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| library(stringr) | |
| library(readr) | |
| i <- read_file("inputs/day03.txt") | |
| f <- function(i) { | |
| str_extract_all(i, "(?<=mul\\()(\\d+),(\\d+)(?=\\))")[[1]] |> | |
| str_split(",") |> | |
| sapply(as.numeric) |> | |
| apply(2, prod) |> | |
| sum() | |
| } | |
| # part 1 | |
| f(i) | |
| x <- str_split( | |
| i, | |
| "(?<=do(n't)?\\(\\))" | |
| )[[1]] | |
| # part 2 | |
| sapply(x[c(TRUE, !str_ends(x, "don't\\(\\)")[1:70])], f) |> sum() |
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