chore: import upstream snapshot with attribution

others/buzz_number.cpp

@@ -0,0 +1,20 @@
+/**
+ * @file
+ * @brief A buzz number is a number that is either divisible by 7 or has last
+ * digit as 7.
+ */
+#include <iostream>
+
+/** main function */
+int main() {
+    int n, t;
+    std::cin >> t;
+    while (t--) {
+        std::cin >> n;
+        if ((n % 7 == 0) || (n % 10 == 7))
+            std::cout << n << " is a buzz number" << std::endl;
+        else
+            std::cout << n << " is not a buzz number" << std::endl;
+    }
+    return 0;
+}