add solution for hw3:4142 & tests

.gitea/workflows/reverse.yml

@@ -19,4 +19,4 @@ jobs:
       
       - name: Run Reverse tests
         run: |
-          java -ea -cp out reverse.ReverseTest Base 3233 3435 3637 3839
+          java -ea -cp out reverse.ReverseTest Base 3233 3435 3637 3839 4142

java/reverse/ReverseAvg.java

@@ -0,0 +1,67 @@
+package reverse;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.Arrays;
+
+public class ReverseAvg {
+    public static void main(String[] args) throws IOException {
+        FastScanner sc = new FastScanner();
+        int[][] lines = new int[8][];
+        int linesCount = 0;
+
+        while (sc.hasNextLine()) {
+            int[] line = new int[8];
+            int count = 0;
+
+            while (sc.hasNextInt()) {
+                if (count >= line.length) {
+                    line = Arrays.copyOf(line, line.length * 2);
+                }
+                line[count++] = sc.nextInt();
+            }
+            sc.nextLine();
+
+            line = Arrays.copyOf(line, count);
+
+            if (linesCount >= lines.length) {
+                lines = Arrays.copyOf(lines, lines.length * 2);
+            }
+            lines[linesCount++] = line;
+        }
+
+        printResult(linesCount, lines);
+    }
+
+    private static void printResult(int linesCount, int[][] lines) {
+        PrintWriter out = new PrintWriter(System.out);
+
+        for (int i = 0; i < linesCount; i++) {
+            int[] line = lines[i];
+
+            for (int j = 0; j < line.length; j++) {
+                if (j > 0) out.print(" ");
+
+                long sum = 0;
+                long count = 0;
+
+                for (int m = 0; m < lines[i].length; m++) {
+                    sum += lines[i][m];
+                    count++;
+                }
+
+                for (int k = 0; k < linesCount; k++) {
+                    if (k != i && lines[k].length > j) {
+                        sum += lines[k][j];
+                        count++;
+                    }
+                }
+
+                out.print(sum / count);
+            }
+            out.println();
+        }
+
+        out.flush();
+    }
+}