diff --git a/580A.cpp b/580A.cpp
new file mode 100644
index 0000000..9fd2c58
--- /dev/null
+++ b/580A.cpp
@@ -0,0 +1,26 @@
+  
+#include <iostream>
+using namespace std;
+
+int main()
+{
+    int n, count=1, result=1;
+    cin >> n;
+    int s[n];
+
+    for (int i = 0; i < n; i++)
+    {
+        cin >> s[i];
+        if (i > 0)
+            if (s[i] >= s[i - 1])
+            {
+                count++;
+                result = max(result, count);
+            }
+            else
+                count = 1;
+    }
+
+    cout << result << endl;
+    return 0;
+}