Day 4 part 1

Cargo.toml

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+md5 = "0.8.0"

src/AoC2015/fourth2015.rs

@@ -0,0 +1,14 @@
+pub fn print_answer(){
+    let input = "ckczppom";
+    let mut i = 1;
+
+    loop {
+        let hash = md5::compute(input.to_string() + &i.to_string());
+        if hash[0] == 0 && hash[1] == 0 && hash[2] < 16 {
+            break;
+        }
+        i += 1;
+    }
+
+    println!("Day\t4\tpart\t1\tanswer:\t{}", i);
+}

src/AoC2015/mod.rs

@@ -1,3 +1,4 @@
 pub mod first2015;
 pub mod second2015;
-pub mod third2015;
+pub mod third2015;
+pub mod fourth2015;

src/AoC2015/third2015.rs

@@ -59,5 +59,5 @@ pub fn print_answer(){
             visited.insert(Vec::from([xRS, yRS]));
         }
     }
-    println!("Day\t3\tpart\t1\tanswer:\t{}", visited.len());
+    println!("Day\t3\tpart\t2\tanswer:\t{}", visited.len());
 }

src/main.rs

@@ -1,8 +1,8 @@
 mod AoC2015;
 
 fn main() {
-    println!("Hello, world!");
     AoC2015::first2015::print_answer();
     AoC2015::second2015::print_answer();
     AoC2015::third2015::print_answer();
+    AoC2015::fourth2015::print_answer();
 }