Programming contests

ICPC programozó csapatverseny, házi forduló, 2019. október 30.

October 30, 2019 10:00 AM – October 30, 2019 3:00 PM

Triples

Let m and n be two positive integers (5 ≤ m ≤ 100, 2 ≤ n ≤ 100). Consider the following sets of triples:

Tm, j = {(x, y, z) ∈ ℕ3x ≤ y ≤ z ≤ m and xj + yj = zj},   j = 2, …, n,

where ℕ is the set of nonnegative integers (ℕ = {0, 1, 2, …}).

The problem asks you to compute the sum Sm,n:

where card(Tm, j) is the number of elements of the set Tm, j.

Input Specification

The input contains a single test case. The first line of the input contains the value of m, and the second line contains the value of n.

Output Specification

Output a single line with the value of the sum Sm,n.

Sample Input

  1. 85
  2. 95
download as text file

Output for Sample Input

  1. 8128
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Original Problem

Southeastern Europe Regional Contest, 2014

University of Debrecen; Faculty of Informatics; v. 03/01/2019