19 files changed, 2 insertions, 18 deletions
diff --git a/prolog/problems/trees/common.py b/prolog/problems/trees/common.py
new file mode 100644
index 0000000..a519878
--- /dev/null
+++ b/prolog/problems/trees/common.py
@@ -0,0 +1,2 @@
+id = 6
+number = 5
diff --git a/prolog/problems/trees/deletebt_3/common.py b/prolog/problems/trees/deletebt_3/common.py
index 0963d15..98ad95f 100644
--- a/prolog/problems/trees/deletebt_3/common.py
+++ b/prolog/problems/trees/deletebt_3/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 137
-group = 'trees'
 number = 47
 visible = True
 facts = None
diff --git a/prolog/problems/trees/deletebt_3/en.py b/prolog/problems/trees/deletebt_3/en.py
index a69ea15..215fced 100644
--- a/prolog/problems/trees/deletebt_3/en.py
+++ b/prolog/problems/trees/deletebt_3/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 137
 name = 'deleteBT/3'
 slug = 'delete an element from a binary tree'
 
diff --git a/prolog/problems/trees/depthbt_2/common.py b/prolog/problems/trees/depthbt_2/common.py
index d8b255d..85dfa27 100644
--- a/prolog/problems/trees/depthbt_2/common.py
+++ b/prolog/problems/trees/depthbt_2/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 140
-group = 'trees'
 number = 45
 visible = True
 facts = None
diff --git a/prolog/problems/trees/depthbt_2/en.py b/prolog/problems/trees/depthbt_2/en.py
index 5616bc0..94fec48 100644
--- a/prolog/problems/trees/depthbt_2/en.py
+++ b/prolog/problems/trees/depthbt_2/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 140
 name = 'depthBT/2'
 slug = 'find the depth of a binary tree'
 
diff --git a/prolog/problems/trees/insertbt_3/common.py b/prolog/problems/trees/insertbt_3/common.py
index 1653183..f8ef004 100644
--- a/prolog/problems/trees/insertbt_3/common.py
+++ b/prolog/problems/trees/insertbt_3/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 138
-group = 'trees'
 number = 48
 visible = True
 facts = None
diff --git a/prolog/problems/trees/insertbt_3/en.py b/prolog/problems/trees/insertbt_3/en.py
index dec4050..08eb2cd 100644
--- a/prolog/problems/trees/insertbt_3/en.py
+++ b/prolog/problems/trees/insertbt_3/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 138
 name = 'insertBT/3'
 slug = 'insert an element into a binary tree'
 
diff --git a/prolog/problems/trees/maxt_2/common.py b/prolog/problems/trees/maxt_2/common.py
index 264f5e2..280cb25 100644
--- a/prolog/problems/trees/maxt_2/common.py
+++ b/prolog/problems/trees/maxt_2/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 143
-group = 'trees'
 number = 50
 visible = True
 facts = None
diff --git a/prolog/problems/trees/maxt_2/en.py b/prolog/problems/trees/maxt_2/en.py
index 18e99d4..20db52e 100644
--- a/prolog/problems/trees/maxt_2/en.py
+++ b/prolog/problems/trees/maxt_2/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 143
 name = 'maxT/2'
 slug = 'find the greatest element in a tree'
 
diff --git a/prolog/problems/trees/memberbt_2/common.py b/prolog/problems/trees/memberbt_2/common.py
index e983b76..f5e5435 100644
--- a/prolog/problems/trees/memberbt_2/common.py
+++ b/prolog/problems/trees/memberbt_2/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 135
-group = 'trees'
 number = 42
 visible = True
 facts = None
diff --git a/prolog/problems/trees/memberbt_2/en.py b/prolog/problems/trees/memberbt_2/en.py
index e9b87a6..e8d48f2 100644
--- a/prolog/problems/trees/memberbt_2/en.py
+++ b/prolog/problems/trees/memberbt_2/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 135
 name = 'memberBT/2'
 slug = 'find elements in a binary tree'
 
diff --git a/prolog/problems/trees/membert_2/common.py b/prolog/problems/trees/membert_2/common.py
index 33a966d..c91371e 100644
--- a/prolog/problems/trees/membert_2/common.py
+++ b/prolog/problems/trees/membert_2/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 142
-group = 'trees'
 number = 49
 visible = True
 facts = None
diff --git a/prolog/problems/trees/membert_2/en.py b/prolog/problems/trees/membert_2/en.py
index 9095e08..738d625 100644
--- a/prolog/problems/trees/membert_2/en.py
+++ b/prolog/problems/trees/membert_2/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 142
 name = 'memberT/2'
 slug = 'find elements in a tree'
 
diff --git a/prolog/problems/trees/mirrorbt_2/common.py b/prolog/problems/trees/mirrorbt_2/common.py
index c10f433..cc271cc 100644
--- a/prolog/problems/trees/mirrorbt_2/common.py
+++ b/prolog/problems/trees/mirrorbt_2/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 136
-group = 'trees'
 number = 43
 visible = True
 facts = None
diff --git a/prolog/problems/trees/mirrorbt_2/en.py b/prolog/problems/trees/mirrorbt_2/en.py
index 797ca93..85c2a54 100644
--- a/prolog/problems/trees/mirrorbt_2/en.py
+++ b/prolog/problems/trees/mirrorbt_2/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 136
 name = 'mirrorBT/2'
 slug = 'flip a binary tree horizontally'
 
diff --git a/prolog/problems/trees/numberbt_2/common.py b/prolog/problems/trees/numberbt_2/common.py
index a7499c2..7df71d8 100644
--- a/prolog/problems/trees/numberbt_2/common.py
+++ b/prolog/problems/trees/numberbt_2/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 139
-group = 'trees'
 number = 44
 visible = True
 facts = None
diff --git a/prolog/problems/trees/numberbt_2/en.py b/prolog/problems/trees/numberbt_2/en.py
index d0f835c..3be193d 100644
--- a/prolog/problems/trees/numberbt_2/en.py
+++ b/prolog/problems/trees/numberbt_2/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 139
 name = 'numberBT/2'
 slug = 'find the number of nodes in a binary tree'
 
diff --git a/prolog/problems/trees/tolistbt_2/common.py b/prolog/problems/trees/tolistbt_2/common.py
index c9765df..e6c8ffd 100644
--- a/prolog/problems/trees/tolistbt_2/common.py
+++ b/prolog/problems/trees/tolistbt_2/common.py
@@ -1,7 +1,6 @@
 # coding=utf-8
 
 id = 141
-group = 'trees'
 number = 46
 visible = True
 facts = None
diff --git a/prolog/problems/trees/tolistbt_2/en.py b/prolog/problems/trees/tolistbt_2/en.py
index e67fffb..a6d0d4b 100644
--- a/prolog/problems/trees/tolistbt_2/en.py
+++ b/prolog/problems/trees/tolistbt_2/en.py
@@ -1,6 +1,5 @@
 # coding=utf-8
 
-id = 141
 name = 'tolistBT/2'
 slug = 'construct a list with all elements of a binary tree'