X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/cf212d59e2363e5c44ed41b39fbbb3ec29a5e261..8e402806b508e8f8a922b280a9c55014babe1bff:/unfinished/numgame.c

diff --git a/unfinished/numgame.c b/unfinished/numgame.c
index 8f59c73..20861ca 100644
--- a/unfinished/numgame.c
+++ b/unfinished/numgame.c
@@ -542,9 +542,9 @@ static int perform_sqrt(int *a, int *b, int *output)
     int half[2] = { 1, 2 };
 
     /*
-     * sqrt(1) == 1: don't perform unary noops.
+     * sqrt(0) == 0, sqrt(1) == 1: don't perform unary noops.
      */
-    if (a[0] == 1 && a[1] == 1) return FALSE;
+    if (a[0] == 0 || (a[0] == 1 && a[1] == 1)) return FALSE;
 
     return perform_exp(a, half, output);
 }