diff --git a/README.md b/README.md
index 6f92035..5d0fa0b 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ We encourage you to share your progress and ask questions in the Discussions sec
 | Day #21       | [Random Maze Generator](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-03/Day-21_Random-Maze-Generator)                 | :white_check_mark:      |
 | Day #22       | [Marcio Mellos Challenge](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-04/Day-22_Marcio-Mellos-Challenge)               | :white_check_mark:      |
 | Day #23       | [The Dining Philosophers](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-04/Day-23_The-Dining_Philosophers)               | :white_check_mark:      |
-| Day #24       | [The Josephus Problem](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-04/Day-24_The-Josephus-Problem)                  | :white_large_square:      |
+| Day #24       | [The Josephus Problem](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-04/Day-24_The-Josephus-Problem)                  | :white_check_mark:      |
 | Day #25       | [Coin Trouble](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-04/Day-25_Coin-Trouble)                          | :white_large_square:      |
 | Day #26       | [Briefcase Lock](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-04/Day-26_Briefcase-Lock)                        | :white_large_square:      |
 | Day #27       | [Task Scheduler](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-04/Day-27_Task-Scheduler)                        | :white_large_square:      |
diff --git a/Week-04/Day-24_The-Josephus-Problem/day24/Cargo.toml b/Week-04/Day-24_The-Josephus-Problem/day24/Cargo.toml
new file mode 100644
index 0000000..ddaaf58
--- /dev/null
+++ b/Week-04/Day-24_The-Josephus-Problem/day24/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "day24"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/Week-04/Day-24_The-Josephus-Problem/day24/src/lib.rs b/Week-04/Day-24_The-Josephus-Problem/day24/src/lib.rs
new file mode 100644
index 0000000..5901c02
--- /dev/null
+++ b/Week-04/Day-24_The-Josephus-Problem/day24/src/lib.rs
@@ -0,0 +1,12 @@
+pub fn josephus(n: usize, i: usize) -> usize {
+    let mut pos = 0;
+    let mut vec = vec![0];
+    for _ in 1..n {
+        pos = (vec.len() * i + pos - (i - 1)) % vec.len();
+        vec.insert(pos, vec.len());
+    }
+    println!("{}/{}, {:?}", pos, vec.len(), vec.iter());
+    let a = (vec.len() + pos - (i - 1)) % vec.len();
+    println!("pos: {pos}, i: {i}, a: {a}");
+    vec.len() - a
+}
diff --git a/Week-04/Day-24_The-Josephus-Problem/day24/src/main.rs b/Week-04/Day-24_The-Josephus-Problem/day24/src/main.rs
new file mode 100644
index 0000000..e4965c9
--- /dev/null
+++ b/Week-04/Day-24_The-Josephus-Problem/day24/src/main.rs
@@ -0,0 +1,6 @@
+use day24::josephus;
+
+fn main() {
+    let res = josephus(11, 3);
+    println!("{res}");
+}
diff --git a/Week-04/Day-24_The-Josephus-Problem/day24/tests/examples.rs b/Week-04/Day-24_The-Josephus-Problem/day24/tests/examples.rs
new file mode 100644
index 0000000..787cc46
--- /dev/null
+++ b/Week-04/Day-24_The-Josephus-Problem/day24/tests/examples.rs
@@ -0,0 +1,24 @@
+#[cfg(test)]
+mod examples {
+    use day24::josephus;
+
+    #[test]
+    fn example1() {
+        assert_eq!(josephus(41, 3), 31);
+    }
+
+    #[test]
+    fn example2() {
+        assert_eq!(josephus(35, 11), 18);
+    }
+
+    #[test]
+    fn example3() {
+        assert_eq!(josephus(11, 1), 11);
+    }
+
+    #[test]
+    fn example4() {
+        assert_eq!(josephus(2, 2), 1);
+    }
+}