diff --git a/36_Flip_Flop/rust/Cargo.toml b/36_Flip_Flop/rust/Cargo.toml
new file mode 100644
index 00000000..6989f4b2
--- /dev/null
+++ b/36_Flip_Flop/rust/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.5"
+morristown = "0.1.3"
diff --git a/36_Flip_Flop/rust/src/game.rs b/36_Flip_Flop/rust/src/game.rs
new file mode 100644
index 00000000..b0eab60a
--- /dev/null
+++ b/36_Flip_Flop/rust/src/game.rs
@@ -0,0 +1,125 @@
+pub struct Game {
+    board: [char; 10],
+    last_move: u8,
+    entropy: f32,
+    tries: u8,
+}
+
+impl Game {
+    pub fn new() -> Self {
+        Game {
+            board: ['X', 'X', 'X', 'X', 'X', 'X', 'X', 'X', 'X', 'X'],
+            last_move: 0,
+            entropy: 0.,
+            tries: 0,
+        }
+    }
+
+    pub fn play(&mut self) -> bool {
+        self.reset_game();
+
+        println!("\nHERE IS THE STARTING LINE OF X'S.\n");
+        println!("1 2 3 4 5 6 7 8 9 10");
+        println!("X X X X X X X X X X\n");
+
+        let mut reset = false;
+
+        loop {
+            self.tries += 1;
+
+            match Game::get_number() {
+                0 => self.reset_board(),
+                11 => {
+                    reset = true;
+                    break;
+                }
+                n => {
+                    self.flip(n);
+
+                    let other = self.get_other(n, n == self.last_move);
+                    if other != n {
+                        self.flip(other);
+                    }
+
+                    println!("other: {}", other);
+                    self.last_move = n;
+                }
+            }
+            self.draw();
+
+            if !self.board.iter().any(|c| *c == 'X') {
+                break;
+            }
+        }
+
+        if !reset {
+            let t = self.tries;
+
+            if t > 12 {
+                println!("TRY HARDER NEXT TIME. IT TOOK YOU {t} GUESSES.");
+            } else {
+                println!("VERY GOOD. IT TOOK YOU ONLY {t} GUESSES.");
+            }
+
+            return morristown::prompt_bool("DO YOU WANT TO TRY ANOTHER PUZZLE?", false);
+        }
+
+        true
+    }
+
+    fn flip(&mut self, i: u8) {
+        if (1..=10).contains(&i) {
+            let i = (i - 1) as usize;
+            let char = &mut self.board[i];
+
+            match char {
+                'X' => *char = '0',
+                '0' => *char = 'X',
+                _ => println!("INVALID BOARD CHARACTER!"),
+            }
+        }
+    }
+
+    fn get_other(&self, m: u8, equals_last_move: bool) -> u8 {
+        let e = self.entropy;
+        let m = m as f32;
+
+        let rate = if equals_last_move {
+            0.592 * (1. / (e / m + e).tan()) / (m * 2. + e).sin() - m.cos()
+        } else {
+            (e + m / e - m).tan() - (e / m).sin() + 336. * (8. * m).sin()
+        };
+
+        (10. * (rate - rate.floor())).floor() as u8
+    }
+
+    fn draw(&self) {
+        println!("1 2 3 4 5 6 7 8 9 10");
+        for c in self.board {
+            print!("{c} ");
+        }
+        println!();
+    }
+
+    fn get_number() -> u8 {
+        loop {
+            let n = morristown::prompt_number::<u8>("INPUT THE NUMBER?");
+            if n > 11 {
+                println!("ILLEGAL ENTRY--TRY AGAIN.");
+            } else {
+                return n;
+            }
+        }
+    }
+
+    fn reset_board(&mut self) {
+        self.board = ['X', 'X', 'X', 'X', 'X', 'X', 'X', 'X', 'X', 'X'];
+    }
+
+    fn reset_game(&mut self) {
+        self.reset_board();
+        self.last_move = 0;
+        self.entropy = rand::random();
+        self.tries = 0;
+    }
+}
diff --git a/36_Flip_Flop/rust/src/main.rs b/36_Flip_Flop/rust/src/main.rs
new file mode 100644
index 00000000..f7c72c86
--- /dev/null
+++ b/36_Flip_Flop/rust/src/main.rs
@@ -0,0 +1,24 @@
+mod game;
+use crate::game::Game;
+
+fn main() {
+    morristown::print_intro("FLIPFLOP");
+
+    println!("THE OBJECT OF THIS PUZZLE IS TO CHANGE THIS:\n");
+    println!("X X X X X X X X X X\n");
+    println!("TO THIS:\n");
+    println!("O O O O O O O O O O\n");
+    println!("BY TYPING THE NUMBER CORRESPONDING TO THE POSITION OF THE");
+    println!("LETTER ON SOME NUMBERS, ONE POSITION WILL CHANGE, ON");
+    println!("OTHERS, TWO WILL CHANGE.  TO RESET LINE TO ALL X'S, TYPE 0");
+    println!("(ZERO) AND TO START OVER IN THE MIDDLE OF A GAME, TYPE ");
+    println!("11 (ELEVEN).");
+
+    let mut game = Game::new();
+
+    loop {
+        if !game.play() {
+            break;
+        }
+    }
+}