feat(codeforces): add solutions for p2189C and p2189D1

Author: lzwjava

src/main/java/com/lzw/solutions/codeforces/p2189C/Main.java

@@ -0,0 +1,43 @@
+package com.lzw.solutions.codeforces.p2198C;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+
+public class Main {
+    private static final BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
+    private static final PrintWriter out = new PrintWriter(System.out, true);
+
+    private static void solve() throws IOException {
+        int t = Integer.parseInt(in.readLine());
+        for (int test = 0; test < t; test++) {
+            int n = Integer.parseInt(in.readLine());
+            int[] p = new int[n];
+            // Place 1 at the last position
+            p[n - 1] = 1;
+            // For positions corresponding to i = 2 to n-1, set p[i-1] = i ^ 1
+            for (int pos = 1; pos < n - 1; pos++) {
+                int i = pos + 1;
+                p[pos] = i ^ 1;
+            }
+            // The missing number goes to the first position
+            if (n % 2 == 0) {
+                p[0] = n;
+            } else {
+                p[0] = n - 1;
+            }
+            // Output the permutation
+            for (int i = 0; i < n; i++) {
+                out.print(p[i]);
+                if (i < n - 1) out.print(" ");
+            }
+            out.println();
+        }
+    }
+
+    public static void main(String[] args) throws IOException {
+        solve();
+        out.close();
+    }
+}

src/main/java/com/lzw/solutions/codeforces/p2189D1/Main.java

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+package com.lzw.solutions.codeforces.p2189D1;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+
+public class Main {
+    private static final BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
+    private static final PrintWriter out = new PrintWriter(System.out, true);
+
+    private static void solve() throws IOException {
+        // your code here
+    }
+
+    public static void main(String[] args) throws IOException {
+        solve();
+        out.close();
+    }
+}

src/main/java/com/lzw/solutions/codeforces/pjava_sample_cf/Main.java

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+2
+3
+6