Created
December 14, 2023 19:27
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2023 advent of code day 8
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# first star | |
network <- read.table("nodes.txt", header = TRUE, sep = "\n") | |
edges <- as.numeric(factor(unlist(strsplit(colnames(network)[1], "")))) + 1 | |
network$node <- sapply(strsplit(gsub("[^A-Z]", " ", network[, 1]), "\\s+"), "[", 1) | |
network$left_node <- sapply(strsplit(gsub("[^A-Z]", " ", network[, 1]), "\\s+"), "[", 2) | |
network$right_node <- sapply(strsplit(gsub("[^A-Z]", " ", network[, 1]), "\\s+"), "[", 3) | |
network <- network[, c(2:4)] | |
follow <- function(node, end_node = "ZZZ") { | |
steps <- 0 | |
while (node != end_node) { | |
node <- network[network$node==node, edges[steps %% length(edges) + 1]] | |
steps <- steps + 1 | |
} | |
steps | |
} | |
follow("AAA") |
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