Add yukicoder/2432.rs

yukicoder/2432.rs

@@ -0,0 +1,56 @@
+use std::io::Read;
+
+fn get_word() -> String {
+    let stdin = std::io::stdin();
+    let mut stdin=stdin.lock();
+    let mut u8b: [u8; 1] = [0];
+    loop {
+        let mut buf: Vec<u8> = Vec::with_capacity(16);
+        loop {
+            let res = stdin.read(&mut u8b);
+            if res.unwrap_or(0) == 0 || u8b[0] <= b' ' {
+                break;
+            } else {
+                buf.push(u8b[0]);
+            }
+        }
+        if buf.len() >= 1 {
+            let ret = String::from_utf8(buf).unwrap();
+            return ret;
+        }
+    }
+}
+
+fn get<T: std::str::FromStr>() -> T { get_word().parse().ok().unwrap() }
+
+// https://yukicoder.me/problems/no/2432 (3)
+// 2HW 回操作すれば必ず (1,1) に戻るので、 4HW 回の操作で同じマスを偶数回踏み初期状態に戻る。
+fn main() {
+    let h: usize = get();
+    let w: usize = get();
+    let k: usize = get();
+    let k = k % (4 * h * w);
+    let mut ans = vec![vec![false; w]; h];
+    for i in 0..k {
+        let mut x = i % (2 * h);
+        if x >= h {
+            x = 2 * h - 1 - x;
+        }
+        let mut y = i % (2 * w);
+        if y >= w {
+            y = 2 * w - 1 - y;
+        }
+        ans[x][y] ^= true;
+    }
+    for i in 0..h {
+        let mut s = "".to_string();
+        for j in 0..w {
+            if ans[i][j] {
+                s.push('#');
+            } else {
+                s.push('.');
+            }
+        }
+        println!("{}", s);
+    }
+}