hdu 2058 The sum problem

http://acm.hdu.edu.cn/showproblem.php?pid=2058

/*2011-9-19author:BearFly1990*/package acm.hdu.tests;import java.io.BufferedInputStream;import java.util.Scanner;public class HDU_2058 {    public static void main(String[] args) {        Scanner in = new Scanner(new BufferedInputStream(System.in));        while(in.hasNext()){            int n = in.nextInt();            int m = in.nextInt();            int len = (int) Math.sqrt(2.0*m);            for(int i=len; i>=1; --i)            {                int temp = m-(i*i+i)/2;                  if(temp%i == 0)                    System.out.printf("[%d,%d]\r\n", temp/i+1, temp/i+i);            }            System.out.printf("\r\n");        }    }}