1_OJ-1163.rar

import java.util.Scanner; public class B { public static void main(String[] args) { Scanner input = new Scanner(System.in); while(input.hasNext()) { int n = input.nextInt(); if(n==0){ System.out.println(" "); } else{ int m = n/3; int y = n%3; int i = 2; int sum = 6; int sum2 = 6; if(m==0){sum=0;} while(i<=m){ sum2 = sum2+3; sum = sum+sum2; i++; } if(y==1){sum=sum+m+1;} if(y==2){sum=sum+(m+1)*2+1;} System.out.println(sum); } } } }