PRoblem Description Given a sequence 1,2,3,……N, your job is to calculate all the possible sub-sequences that the sum of the sub-sequence is M.
Input Input contains multiple test cases. each case contains two integers N, M( 1 <= N, M <= 1000000000).input ends with N = M = 0.
Output For each test case, print all the possible sub-sequence that its sum is M.The format is show in the sample below.print a blank line after each test case.
Sample Input 20 10 50 30 0 0
Sample Output [1,4] [10,10]
[4,8] [6,9] [9,11] [30,30]
import java.util.*;class Main { public static void main(String args[]) { Scanner cin = new Scanner(System.in); while (cin.hasNext()) { long n = cin.nextInt(); long m = cin.nextInt(); if (n == 0 && m == 0) break; long d = 0; for (int i = (int) Math.sqrt(2 * m); i > 0; i--) { d = m - (i + i * i) / 2; if (d % i == 0) System.out.println("[" + (d / i + 1) + "," + (d / i + i) + "]"); } System.out.println(); } }}新聞熱點(diǎn)
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