From 3919f90cfbfbba26c8e39f979280649f5e08aea8 Mon Sep 17 00:00:00 2001
From: Yigit Sever
Date: Fri, 10 Dec 2021 19:54:14 +0300
Subject: 2021, day4: done, please don't look at this

---
 2021/day4/Cargo.toml    |   8 +
 2021/day4/input         | 601 ++++++++++++++++++++++++++++++++++++++++++++++++
 2021/day4/input.example |  19 ++
 2021/day4/src/main.rs   |  99 ++++++++
 4 files changed, 727 insertions(+)
 create mode 100644 2021/day4/Cargo.toml
 create mode 100644 2021/day4/input
 create mode 100644 2021/day4/input.example
 create mode 100644 2021/day4/src/main.rs

(limited to '2021/day4')

diff --git a/2021/day4/Cargo.toml b/2021/day4/Cargo.toml
new file mode 100644
index 0000000..8842130
--- /dev/null
+++ b/2021/day4/Cargo.toml
@@ -0,0 +1,8 @@
+[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]
diff --git a/2021/day4/input b/2021/day4/input
new file mode 100644
index 0000000..33aa45f
--- /dev/null
+++ b/2021/day4/input
@@ -0,0 +1,601 @@
+84,28,29,75,58,71,26,6,73,74,41,39,87,37,16,79,55,60,62,80,64,95,46,15,5,47,2,35,32,78,89,90,96,33,4,69,42,30,54,85,65,83,44,63,20,17,66,81,67,77,36,68,82,93,10,25,9,34,24,72,91,88,11,38,3,45,14,56,22,61,97,27,12,48,18,1,31,98,86,19,99,92,8,43,52,23,21,0,7,50,57,70,49,13,51,40,76,94,53,59
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diff --git a/2021/day4/input.example b/2021/day4/input.example
new file mode 100644
index 0000000..669a51d
--- /dev/null
+++ b/2021/day4/input.example
@@ -0,0 +1,19 @@
+7,4,9,5,11,17,23,2,0,14,21,24,10,16,13,6,15,25,12,22,18,20,8,19,3,26,1
+
+22 13 17 11  0
+ 8  2 23  4 24
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+ 6 10  3 18  5
+ 1 12 20 15 19
+
+ 3 15  0  2 22
+ 9 18 13 17  5
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+14 21 16 12  6
+
+14 21 17 24  4
+10 16 15  9 19
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+22 11 13  6  5
+ 2  0 12  3  7
diff --git a/2021/day4/src/main.rs b/2021/day4/src/main.rs
new file mode 100644
index 0000000..4b6150f
--- /dev/null
+++ b/2021/day4/src/main.rs
@@ -0,0 +1,99 @@
+use std::env;
+use std::fs::File;
+use std::io::{BufRead, BufReader};
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() != 2 {
+        eprintln!("Usage: {} filename", args[0]);
+        std::process::exit(1);
+    }
+
+    let filename = &args[1];
+
+    let file = File::open(filename).unwrap_or_else(|_| panic!("No such file: {}", filename));
+    let reader = BufReader::new(file);
+
+    let mut fd = reader.lines();
+    let mut called_numbers: Vec<i32> = Vec::new();
+
+    if let Ok(called_nums) = fd.next().unwrap() {
+        called_numbers = called_nums.split(",").map(|x| x.parse().unwrap()).collect();
+    }
+
+    fd.next(); /* Skip the empty line */
+
+    let mut boards: Vec<(Vec<(i32, bool)>, bool)> = Vec::new();
+
+    'outer: loop {
+        let mut miniboard: Vec<(i32, bool)> = Vec::new();
+        for _ in 0..5 {
+            /* New Board */
+            if let Some(maybe_line) = fd.next() {
+                if let Ok(line) = maybe_line {
+                    for (a, b) in line
+                        .split_whitespace()
+                        .map(|x| x.parse().unwrap())
+                        .zip([false].iter().cycle())
+                    {
+                        miniboard.push((a, *b));
+                    }
+                }
+            } else {
+                break 'outer;
+            }
+        }
+        boards.push((miniboard.clone(), false));
+        fd.next(); /* Skip the empty line */
+    }
+
+    for bingo in called_numbers {
+        for (board, _) in boards.iter_mut() {
+            for (num, mark) in board.iter_mut() {
+                if *num == bingo {
+                    *mark = true;
+                }
+            }
+        }
+
+        let mut count;
+        for (board, won) in boards.iter_mut() {
+            for row in 0..5 {
+                count = 0;
+                for i in row * 5..(row * 5) + 5 {
+                    if board[i].1 {
+                        count += 1;
+                    }
+                }
+                if count == 5 {
+                    *won = true;
+                }
+            }
+
+            for column in 0..5 {
+                count = 0;
+                for i in (0..5).map(|x| 5 * x + column) {
+                    if board[i].1 {
+                        count += 1;
+                    }
+                }
+                if count == 5 {
+                    *won = true;
+                }
+            }
+        }
+        if boards.len() == 1 {
+            let mut score: i32 = 0;
+            if let Some(board) = boards.get(0) {
+                for (winnynum, marked) in board.0.iter() {
+                    if !marked {
+                        score += winnynum;
+                    }
+                }
+                println!("score: {}", score * bingo);
+            }
+        }
+        boards.retain(|x| !x.1);
+    }
+}
-- 
cgit v1.2.3-70-g09d2