F.A.Q
Hand In Hand
Online Acmers
Problem Archive
Realtime Judge Status
Authors Ranklist
 
     C/C++/Java Exams     
ACM Steps
Go to Job
Contest LiveCast
ICPC@China
Best Coder beta
VIP | STD Contests
    DIY | Web-DIY beta
Author ID 
Password 
 Register new ID

Goffi and Squary Partition

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 1634    Accepted Submission(s): 558


Problem Description
Recently, Goffi is interested in squary partition of integers.

A set \(X\) of \(k\) distinct positive integers is called squary partition of \(n\) if and only if it satisfies the following conditions:
[ol]
  • the sum of \(k\) positive integers is equal to \(n\)

  • one of the subsets of \(X\) containing \(k - 1\) numbers sums up to a square of integer.
  • [/ol]
    For example, a set {1, 5, 6, 10} is a squary partition of 22 because 1 + 5 + 6 + 10 = 22 and 1 + 5 + 10 = 16 = 4 กม 4.

    Goffi wants to know, for some integers \(n\) and \(k\), whether there exists a squary partition of \(n\) to \(k\) distinct positive integers.
     

    Input
    Input contains multiple test cases (less than 10000). For each test case, there's one line containing two integers \(n\) and \(k\) (\(2 \le n \le 200000, 2 \le k \le 30\)).
     

    Output
    For each case, if there exists a squary partition of \(n\) to \(k\) distinct positive integers, output "YES" in a line. Otherwise, output "NO".
     

    Sample Input
    2 2 4 2 22 4
     

    Sample Output
    NO YES YES
     

    Source
     

    Statistic | Submit | Discuss | Note
    Hangzhou Dianzi University Online Judge 3.0
    Copyright © 2005-2024 HDU ACM Team. All Rights Reserved.
    Designer & Developer : Wang Rongtao LinLe GaoJie GanLu
    Total 0.000000(s) query 1, Server time : 2024-11-22 05:00:03, Gzip enabled