Pardaboyeva Shaxnoza using System

121-20 Pardaboyeva Shaxnoza

using System;
class HelloWorld {
static void Main() {
int n; int S=0;
n = Convert.ToInt32(Console.ReadLine());
for (int i = 1; i < n; i++) {
if (i % 2 == 0) {
S+=i;
Console.WriteLine(S);
}
}
}
}