diff --git a/tessoku-book/src/bin/a43.rs b/tessoku-book/src/bin/a43.rs
index 2a9506c8..2a17c164 100644
--- a/tessoku-book/src/bin/a43.rs
+++ b/tessoku-book/src/bin/a43.rs
@@ -1,10 +1,19 @@
-use proconio::{input, marker::Usize1};
+use proconio::input;
 
 fn main() {
     input! {
         n: usize,
-        a: [Usize1; n],
+        l: usize,
+        ab: [(usize, char); n],
     };
-    let ans = n - a.len();
+    let ans = ab
+        .into_iter()
+        .map(|(a, b)| match b {
+            'E' => l - a,
+            'W' => a,
+            _ => unreachable!(),
+        })
+        .max()
+        .unwrap();
     println!("{}", ans);
 }
diff --git a/tessoku-book/src/bin/a44.rs b/tessoku-book/src/bin/a44.rs
index 2a9506c8..3bc58551 100644
--- a/tessoku-book/src/bin/a44.rs
+++ b/tessoku-book/src/bin/a44.rs
@@ -3,8 +3,32 @@ use proconio::{input, marker::Usize1};
 fn main() {
     input! {
         n: usize,
-        a: [Usize1; n],
+        q: usize,
     };
-    let ans = n - a.len();
-    println!("{}", ans);
+    let mut a = (1..=n).collect::<Vec<usize>>();
+    let mut rev = false;
+    for _ in 0..q {
+        input! {
+            t: usize
+        }
+        match t {
+            1 => {
+                input! {
+                    x: Usize1,
+                    y: usize,
+                }
+                a[if rev { n - 1 - x } else { x }] = y;
+            }
+            2 => {
+                rev = !rev;
+            }
+            3 => {
+                input! {
+                    x: Usize1,
+                }
+                println!("{}", a[if rev { n - 1 - x } else { x }]);
+            }
+            _ => unreachable!(),
+        }
+    }
 }
diff --git a/tessoku-book/src/bin/b43.rs b/tessoku-book/src/bin/b43.rs
index 2a9506c8..4b2872b6 100644
--- a/tessoku-book/src/bin/b43.rs
+++ b/tessoku-book/src/bin/b43.rs
@@ -3,8 +3,14 @@ use proconio::{input, marker::Usize1};
 fn main() {
     input! {
         n: usize,
-        a: [Usize1; n],
+        m: usize,
+        a: [Usize1; m],
     };
-    let ans = n - a.len();
-    println!("{}", ans);
+    let mut count = vec![0_usize; n];
+    for a_i in a {
+        count[a_i] += 1;
+    }
+    for c in count {
+        println!("{}", m - c);
+    }
 }
diff --git a/tessoku-book/src/bin/b44.rs b/tessoku-book/src/bin/b44.rs
index 2a9506c8..47aed88f 100644
--- a/tessoku-book/src/bin/b44.rs
+++ b/tessoku-book/src/bin/b44.rs
@@ -3,8 +3,20 @@ use proconio::{input, marker::Usize1};
 fn main() {
     input! {
         n: usize,
-        a: [Usize1; n],
+        a: [[usize; n]; n],
+        q: usize,
+        query: [(usize, Usize1, Usize1); q],
     };
-    let ans = n - a.len();
-    println!("{}", ans);
+    let mut is = (0..n).collect::<Vec<usize>>();
+    for (t, x, y) in query {
+        match t {
+            1 => {
+                is.swap(x, y);
+            }
+            2 => {
+                println!("{}", a[is[x]][y]);
+            }
+            _ => unreachable!(),
+        }
+    }
 }