From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 9 Mar 2014 18:20:26 +0000 (+0000)
Subject: fudge the {n,m}_max_frags to deal with rounding errors in glpk results
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=matchsticks-search.git;a=commitdiff_plain;h=1308bcff6d57a514091e9924bb7e37298b404b77;ds=sidebyside

fudge the {n,m}_max_frags to deal with rounding errors in glpk results
---

diff --git a/main.c b/main.c
index c5a4991..f0bb84f 100644
--- a/main.c
+++ b/main.c
@@ -138,9 +138,13 @@ static void set_best(double new_best) {
    *   <=>       frags <   |  n / best  |
    *                        _          _
    *   <=>       frags <=  |  n / best  | - 1
+   *
+   * But best values from glpk are slightly approximate, so we
+   * subtract a fudge factor from our target.
    */
-  n_max_frags = ceil(n / best) - 1;
-  m_max_frags = ceil(m / best) - 1;
+  double near_best = best * 0.98 - 0.02;
+  n_max_frags = ceil(n / near_best) - 1;
+  m_max_frags = ceil(m / near_best) - 1;
 }
 
 /*----- multicore support -----*/