Initital commitHEADmain

Day01 - Day06

1 files changed, 103 insertions, 0 deletions

diff --git a/day06/src/main.rs b/day06/src/main.rs
new file mode 100644
index 0000000..e5fd0fa
--- /dev/null
+++ b/day06/src/main.rs
@@ -0,0 +1,103 @@
+use std::io;
+
+fn main() {
+    let mut rows = Vec::new();
+    let mut ops = Vec::new();
+
+    /* Part 1
+    loop {
+        let mut buffer = String::new();
+        let bytes = io::stdin().read_line(&mut buffer).unwrap();
+        if bytes == 0 {
+            break;
+        }
+        let mut iter = buffer.trim_end().split_ascii_whitespace();
+        let first = iter.next().unwrap();
+        match first.parse::<i64>() {
+            Ok(number) => {
+                let mut numbers = Vec::new();
+                numbers.push(number);
+                numbers.extend(iter.map(|x| x.parse::<i64>().unwrap()));
+                rows.push(numbers);
+            },
+            Err(_) => {
+                ops.push(first.to_string());
+                ops.extend(iter.map(|x| x.to_string()));
+            }
+        }
+    }
+     */
+
+    let mut lines = Vec::new();
+
+    loop {
+        let mut buffer = String::new();
+        let bytes = io::stdin().read_line(&mut buffer).unwrap();
+        if bytes == 0 {
+            break;
+        }
+        buffer.pop();
+        lines.push(buffer.to_string());
+    }
+
+    ops.extend(
+        lines
+            .pop()
+            .unwrap()
+            .split_ascii_whitespace()
+            .map(|x| x.to_string()),
+    );
+
+    let lines2: Vec<Vec<char>> = lines.iter().map(|x| x.chars().collect()).collect();
+
+    let mut row = Vec::<i64>::new();
+
+    for col in (0..lines2[0].len()).rev() {
+        let mut numbers = Vec::new();
+        for line in &lines2 {
+            if line[col] != ' ' {
+                numbers.push(line[col].to_digit(10).unwrap());
+            }
+        }
+        match numbers.pop() {
+            Some(number) => {
+                let mut tmp = number;
+                let mut tmp2 = 10;
+                while let Some(number) = numbers.pop() {
+                    tmp += number * tmp2;
+                    tmp2 *= 10;
+                }
+                row.push(tmp.into());
+            }
+            None => {
+                rows.insert(0, row);
+                row = Vec::new();
+            }
+        }
+    }
+
+    rows.insert(0, row);
+
+    let mut column = Vec::new();
+
+    for col in 0..ops.len() {
+        let mut result = 0;
+        match ops[col].as_str() {
+            "+" => {
+                for row in &rows[col] {
+                    result += row;
+                }
+            }
+            "*" => {
+                result = 1;
+                for row in &rows[col] {
+                    result *= row;
+                }
+            }
+            &_ => todo!(),
+        }
+        column.push(result);
+    }
+
+    println!("{}", column.iter().sum::<i64>())
+}