Merge pull request #12123 from deadmarshal/TWC324

TWC324

2 files changed, 38 insertions, 0 deletions

diff --git a/challenge-324/deadmarshal/java/Ch1.java b/challenge-324/deadmarshal/java/Ch1.java
new file mode 100644
index 0000000000..80e1014aa1
--- /dev/null
+++ b/challenge-324/deadmarshal/java/Ch1.java
@@ -0,0 +1,20 @@
+import java.util.Arrays;
+
+public class Ch1 {
+  public static void main(String[] args) {
+    System.out.println(Arrays.deepToString(twod_array(new int[]{1, 2, 3, 4}, 2, 2)));
+    System.out.println(Arrays.deepToString(twod_array(new int[]{1, 2, 3}, 1, 3)));
+    System.out.println(Arrays.deepToString(twod_array(new int[]{1, 2, 3, 4}, 4, 1)));
+  }
+
+  private static int[][] twod_array(int[] arr, int r, int c) {
+    if (r * c != arr.length) return new int[0][0];
+    int[][] res = new int[r][c];
+    for (int i = 0; i < r; ++i) {
+      for (int j = 0; j < c; ++j) {
+        res[i][j] = arr[i * c + j];
+      }
+    }
+    return res;
+  }
+}
diff --git a/challenge-324/deadmarshal/java/Ch2.java b/challenge-324/deadmarshal/java/Ch2.java
new file mode 100644
index 0000000000..5236df8664
--- /dev/null
+++ b/challenge-324/deadmarshal/java/Ch2.java
@@ -0,0 +1,18 @@
+public class Ch2 {
+  public static void main(String[] args) {
+    System.out.println(total_xor(new int[]{1, 3}));
+    System.out.println(total_xor(new int[]{5, 1, 6}));
+    System.out.println(total_xor(new int[]{3, 4, 5, 6, 7, 8}));
+  }
+
+  private static int total_xor(int[] arr) {
+    int n = arr.length, res = 0;
+    for (int i = 0; i < 1 << n; ++i) {
+      int s = 0;
+      for (int j = 0; j < n; ++j) if ((i >> j & 1) == 1) s ^= arr[j];
+      res += s;
+    }
+    return res;
+  }
+}
+