import java.util.Scanner; public class Main{ public static void main(String[] args) { Scanner scanner=new Scanner(System.in); while (scanner.hasNext()){ int n=Integer.parseInt(scanner.nextLine()); int m=n/2; int sum=((m-1)*m)/2; if(n%2!=0) { sum+=sum+m; } else { sum+=sum; } System.out.println(sum); } } } |
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