Created
December 11, 2023 00:55
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2023 advent of code day 7
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# first star | |
hands <- data.frame(read.table("hands.txt", header = FALSE, sep = " ", col.names = c("cards", "bid"))) | |
hands$hand <- lapply(strsplit(hands$cards, ""), function(x){ | |
type.convert(gsub("A", 14, | |
gsub("K", 13, | |
gsub("Q", 12, | |
gsub("J", 11, | |
gsub("T", 10, x))))), as.is = TRUE) | |
}) | |
hands$hand_rank <- sapply(hands$hand, function(x){ | |
ifelse(length(which(table(x)==5)), 7, | |
ifelse(length(which(table(x)==4)), 6, | |
ifelse((max(table(x))==3 & min(table(x))==2), 5, | |
ifelse((max(table(x))==3 & min(table(x))<2), 4, | |
ifelse(sum(table(x)==2)==2, 3, | |
ifelse(sum(table(x)==2)==1, 2, 1)))))) | |
}) | |
hands <- cbind(hands[, c("bid", "hand_rank")], do.call(rbind, hands$hand)) | |
hands <- hands[order(hands[,2], hands[,3], hands[,4], hands[,5], hands[,6], hands[,7], decreasing = FALSE), ] | |
hands$final_rank <- seq_along(hands[,1]) | |
hands$winnings <- hands$bid*hands$final_rank | |
sum(hands$winnings) | |
# second star | |
hands <- data.frame(read.table("hands.txt", header = FALSE, sep = " ", col.names = c("cards", "bid"))) | |
hands$with_joker <- sapply(hands$cards, function(x){ | |
ranks <- c("A", "K", "Q", "T", "9", "8", "7", "6", "5", "4", "3", "2", "J") | |
tab <- table(unlist(strsplit(x, "")))[ranks] | |
ifelse(grepl("J", x) & names(which.max(tab)) != "J", gsub("J", names(which.max(tab)), x), | |
ifelse(grepl("J", x), gsub("J", names(sort(tab)[1]), x), x)) | |
}) | |
convert <- function(x){ | |
type.convert(gsub("A", 14, | |
gsub("K", 13, | |
gsub("Q", 12, | |
gsub("J", 1, | |
gsub("T", 10, x))))), as.is = TRUE) | |
} | |
hands$hand <- lapply(strsplit(hands$cards, ""), convert) | |
hands$joker_hand <- lapply(strsplit(hands$with_joker, ""), convert) | |
hands$hand_rank <- sapply(hands$joker_hand, function(x){ | |
ifelse(length(which(table(x)==5)), 7, | |
ifelse(length(which(table(x)==4)), 6, | |
ifelse((max(table(x))==3 & min(table(x))==2), 5, | |
ifelse((max(table(x))==3 & min(table(x))<2), 4, | |
ifelse(sum(table(x)==2)==2, 3, | |
ifelse(sum(table(x)==2)==1, 2, 1)))))) | |
}) | |
hands <- cbind(hands[, c("bid", "hand", "joker_hand", "hand_rank")], do.call(rbind, hands$hand)) | |
hands <- hands[order(hands[,4], hands[,5], hands[,6], hands[,7], hands[,8], hands[,9], decreasing = FALSE), ] | |
hands$final_rank <- seq_along(hands[,1]) | |
hands$winnings <- hands$bid*hands$final_rank | |
sum(hands$winnings) |
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