day2's challenge

2020/day_2/src/main.rs

@@ -1,3 +1,27 @@
 fn main() {
-    println!("Hello, world!");
+    let mut passline: Vec<String> = Vec::new();
+    let contents = std::fs::read_to_string("input1").unwrap();
+    for s in contents.lines() {
+        passline.push(s.parse::<String>().unwrap());
+    }
+    let mut valid_passwords = 0;
+    for line in passline.iter() {
+        let psplit: Vec<&str> = line.split(" ").collect();
+        let r: Vec<&str> = psplit[0].split("-").collect();
+        let min: usize = r[0].parse().unwrap();
+        let max: usize = r[1].parse().unwrap();
+        let key: u8 = psplit[1].chars().next().unwrap() as u8;
+        let pass = psplit[2];
+        // let c = pass.matches(key).count();
+        // if c >= min && c <= max {
+        //     valid_passwrods += 1;
+        // }
+        if (pass.as_bytes()[min - 1] == key && pass.as_bytes()[max - 1] != key)
+            || (pass.as_bytes()[min - 1] != key && pass.as_bytes()[max - 1] == key)
+        {
+            valid_passwords += 1;
+        }
+        // print!("{} {} {} {}\n", min, max, key, pass);
+    }
+    print!("Valid Passwords Found: {}\n", valid_passwords);
 }