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Day 4 part 1 in rust!

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Steph 2022-12-01 21:02:00 +01:00
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2021/4/.gitignore vendored Normal file
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target/

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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "day4"
version = "0.1.0"

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[package]
name = "day4"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

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use std::fs;
fn main() {
part_one();
part_two();
}
fn part_one() {
let contents = fs::read_to_string("input")
.expect("Something went wrong reading the file");
let mut groups: Vec<String> = contents
.split("\n\n")
.map(|x| x
.to_string()
)
.collect();
let bingo_nums: Vec<i32> = groups
.remove(0)
.split(',')
.map(|x| x
.parse::<i32>()
.unwrap()
)
.collect();
let mut boards: Vec<Vec<Vec<i32>>> = groups.iter().map(|group| group
.split('\n')
.map(|x| x
.split(' ')
.filter(|x| *x != "")
.map(|x| x
.parse::<i32>()
.unwrap()
)
.collect()
)
.collect()
).collect();
for num in bingo_nums {
boards = boards
.into_iter()
.map(|board| board
.into_iter()
.map(|row| row
.into_iter()
.map(|x| if x == num { -1 } else { x })
.collect()
)
.collect()
)
.collect();
let winning_boards: Vec<&Vec<Vec<i32>>> = boards.iter()
.filter(|board|
board.iter().filter(|row|
row[0] == -1 && row[1] == -1 && row[2] == -1 && row[3] == -1 && row[4] == -1
).collect::<Vec<&Vec<i32>>>().len() > 0 ||
[0, 1, 2, 3, 4].into_iter().filter(|column|
board[0][*column] == -1 && board[1][*column] == -1 && board[2][*column] == -1 && board[3][*column] == -1 && board[4][*column] == -1
).collect::<Vec<usize>>().len() > 0
).collect();
if winning_boards.len() > 0 {
let sum: i32 = winning_boards.into_iter().take(1).flatten().flatten().filter(|x| **x != -1).sum();
println!("Part 1, final score: {}", sum * num);
break;
}
}
}
fn part_two() {
let contents = fs::read_to_string("input")
.expect("Something went wrong reading the file");
let mut groups: Vec<String> = contents
.split("\n\n")
.map(|x| x
.to_string()
)
.collect();
let bingo_nums: Vec<i32> = groups
.remove(0)
.split(',')
.map(|x| x
.parse::<i32>()
.unwrap()
)
.collect();
let mut boards: Vec<Vec<Vec<i32>>> = groups.iter().map(|group| group
.split('\n')
.map(|x| x
.split(' ')
.filter(|x| *x != "")
.map(|x| x
.parse::<i32>()
.unwrap()
)
.collect()
)
.collect()
).collect();
for num in bingo_nums {
boards = boards
.into_iter()
.map(|board| board
.into_iter()
.map(|row| row
.into_iter()
.map(|x| if x == num { -1 } else { x })
.collect()
)
.collect()
)
.collect();
let winning_boards: Vec<&Vec<Vec<i32>>> = boards.iter()
.filter(|board|
board.iter().filter(|row|
row[0] == -1 && row[1] == -1 && row[2] == -1 && row[3] == -1 && row[4] == -1
).collect::<Vec<&Vec<i32>>>().len() > 0 ||
[0, 1, 2, 3, 4].into_iter().filter(|column|
board[0][*column] == -1 && board[1][*column] == -1 && board[2][*column] == -1 && board[3][*column] == -1 && board[4][*column] == -1
).collect::<Vec<usize>>().len() > 0
).collect();
if winning_boards.len() == boards.len() {
let sum: i32 = winning_boards.into_iter().last().into_iter().flatten().flatten().filter(|x| **x != -1).sum();
println!("Part 2, final score: {}", sum * num);
break;
}
}
}