diff --git a/W4o5or/ELlGek.cpp b/W4o5or/ELlGek.cpp
new file mode 100644
index 0000000..23bf3ca
--- /dev/null
+++ b/W4o5or/ELlGek.cpp
@@ -0,0 +1,17 @@
+#include <iostream>
+
+int main() {
+    int n;
+    double sum = 0.0;
+
+    std::cout << "Enter the value of n: ";
+    std::cin >> n;
+
+    for (int i = 1; i <= n; ++i) {
+        sum += 1.0 / (i * i);
+    }
+
+    std::cout << "The sum of the series is: " << sum << std::endl;
+
+    return 0;
+}