diff --git a/2 b/2
new file mode 100644
index 0000000..2cb0d13
--- /dev/null
+++ b/2
@@ -0,0 +1,43 @@
+int scan(int matrix[9][9], int r)
+{
+    int num = 0;
+    for (int i = 0;i < 9;i++)
+    {
+        if (matrix[r][i] != 0)num++;
+    }
+    return num;
+}
+void ran0(int matrix[9][9],int n)
+{
+    int count = 0;
+    int r, j, num;
+    while (count < 9)
+    {
+        do
+        {
+            r = rand() % 3;
+            num = scan(matrix, r + n);
+        } while (num >= 3);
+        do
+        {
+            j = rand() % 9;
+        } while (matrix[r+n][j] != 0);
+        matrix[r + n][j] = ++count;
+    }
+}
+void ran(int matrix[9][9])
+{
+    ran0(matrix, 0);
+    ran0(matrix, 3);
+    ran0(matrix, 6);
+}
+int main()
+{
+    srand(time(NULL));
+    int matrix[9][9] = { 0 };
+    ran(matrix);
+    mat(matrix);
+    system("pause");
+    return 0;
+}
+