chore: import upstream snapshot with attribution

others/stairs_pattern.cpp

@@ -0,0 +1,35 @@
+/**
+ * @file
+@brief This program is use to print the following pattern<pre>
+   \*\*
+   \*\*
+  \*\*\*\*
+  \*\*\*\*
+ \*\*\*\*\*\*
+ \*\*\*\*\*\*
+\*\*\*\*\*\*\*\*
+********</pre>
+where number of pairs line is given by user
+*/
+#include <iostream>
+
+/** main function */
+int main() {
+    int l, st = 2, x, r, z, n, sp;
+    std::cout << "Enter number of pair - ";
+    std::cin >> x;
+    z = x;
+    for (r = 1; r <= x; r++) {
+        z = z - 1;
+        for (n = 1; n <= 2; n++) {
+            for (sp = 1; sp <= z; sp++) {
+                std::cout << " ";
+            }
+            for (l = 1; l <= st; l++) {
+                std::cout << "\\*";
+            }
+            std::cout << std::endl;
+        }
+        st = st + 2;
+    }
+}