init

2023/day4/p1/main.rs

@@ -0,0 +1,41 @@
+use std::fs;
+
+
+fn main() {
+    let file_path = "./input.text";
+
+    let contents = fs::read_to_string(file_path)
+        .unwrap();
+
+    let mut sum_of_points = 0;
+    for line in contents.lines()
+    {
+        let line_halves: Vec<&str> = line.split(" | ").collect();
+
+        let first_half: Vec<&str> = line_halves[0].split(": ").collect();
+
+        let winning_numbers: Vec<&str> = first_half[1].split(" ").filter(|num| !num.is_empty()).collect();
+
+        let my_numbers = line_halves[1].split(" ").filter(|num| !num.is_empty());
+
+        let mut points = 0;
+        for number in my_numbers
+        {
+            if winning_numbers.contains(&number)
+            {
+                if points == 0
+                {
+                    points = 1;
+                }
+                else
+                {
+                    points *= 2;
+                }
+            }
+        }
+
+        sum_of_points += points;
+    }
+
+    println!("Sum of points on cards: {sum_of_points}");
+}