diff --git a/Workshop - 1 (Random, BFS, DFS, DP).ipynb b/Workshop - 1 (Random, BFS, DFS, DP).ipynb
index 4faa6ee..650c534 100644
--- a/Workshop - 1 (Random, BFS, DFS, DP).ipynb	
+++ b/Workshop - 1 (Random, BFS, DFS, DP).ipynb	
@@ -69,7 +69,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "There are problems at different levels. **3 simple, 2 medium, 1 difficult**."
+    "There are problems at different levels. **3 easy, 2 medium, 1 difficult**."
    ]
   },
   {
@@ -92,7 +92,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ulysses16 = np.array(load_data(\"./template/data/simple/ulysses16.tsp\"))"
+    "ulysses16 = np.array(load_data(\"./template/data/easy/ulysses16.tsp\"))"
    ]
   },
   {
@@ -313,7 +313,7 @@
    },
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -399,7 +399,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -492,7 +492,7 @@
    },
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -604,7 +604,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -709,7 +709,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -782,7 +782,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_problem = './template/data/simple/ulysses16.tsp'"
+    "tsp_problem = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -954,7 +954,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Simple\n",
+    "# Easy\n",
     "# ulysses16:   77 (BFS),     84 (DFS)\n",
     "# att48:    39236 (BFS),  40763 (DFS)\n",
     "# st70:       761 (BFS),    901 (DFS)\n",
diff --git a/Workshop - 2 (UCS, A, Hill-Climbing).ipynb b/Workshop - 2 (UCS, A, Hill-Climbing).ipynb
index cf10744..06d9682 100644
--- a/Workshop - 2 (UCS, A, Hill-Climbing).ipynb	
+++ b/Workshop - 2 (UCS, A, Hill-Climbing).ipynb	
@@ -69,7 +69,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "There are problems at different levels. **3 simple, 2 medium, 1 difficult**."
+    "There are problems at different levels. **3 easy, 2 medium, 1 difficult**."
    ]
   },
   {
@@ -92,7 +92,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ulysses16 = np.array(load_data(\"./template/data/simple/ulysses16.tsp\"))"
+    "ulysses16 = np.array(load_data(\"./template/data/easy/ulysses16.tsp\"))"
    ]
   },
   {
@@ -315,7 +315,7 @@
    },
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -430,7 +430,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -548,7 +548,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -674,7 +674,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -747,7 +747,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_problem = './template/data/simple/ulysses16.tsp'"
+    "tsp_problem = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -892,7 +892,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Simple\n",
+    "# Easy\n",
     "# ulysses16:  77.12 (UCS-BFS),     77.02 (A-Star)\n",
     "# att48:      39236 (UCS-BFS),     47853 (A-Star)\n",
     "# st70:         761 (UCS-BFS),  time-out (A-Star)\n",
diff --git a/Workshop - 4 (TSP SA).ipynb b/Workshop - 4 (TSP SA).ipynb
index fc21548..2343f09 100644
--- a/Workshop - 4 (TSP SA).ipynb	
+++ b/Workshop - 4 (TSP SA).ipynb	
@@ -69,7 +69,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "There are problems at different levels. **3 simple, 2 medium, 1 difficult**."
+    "There are problems at different levels. **3 easy, 2 medium, 1 difficult**."
    ]
   },
   {
@@ -92,7 +92,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ulysses16 = np.array(load_data(\"./template/data/simple/ulysses16.tsp\"))"
+    "ulysses16 = np.array(load_data(\"./template/data/easy/ulysses16.tsp\"))"
    ]
   },
   {
@@ -309,7 +309,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -444,7 +444,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -521,7 +521,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
diff --git a/Workshop - 5 (ACO, PSO).ipynb b/Workshop - 5 (ACO, PSO).ipynb
index 865c9b5..ac2c89d 100644
--- a/Workshop - 5 (ACO, PSO).ipynb	
+++ b/Workshop - 5 (ACO, PSO).ipynb	
@@ -69,7 +69,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "There are problems at different levels. **3 simple, 2 medium, 1 difficult**."
+    "There are problems at different levels. **3 easy, 2 medium, 1 difficult**."
    ]
   },
   {
@@ -92,7 +92,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ulysses16 = np.array(load_data(\"./template/data/simple/ulysses16.tsp\"))"
+    "ulysses16 = np.array(load_data(\"./template/data/easy/ulysses16.tsp\"))"
    ]
   },
   {
@@ -311,7 +311,7 @@
    },
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -498,7 +498,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -564,7 +564,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_problem = './template/data/simple/ulysses16.tsp'"
+    "tsp_problem = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
diff --git a/Workshop - 6 (GA, SOM).ipynb b/Workshop - 6 (GA, SOM).ipynb
index d5dca89..ebc33bb 100644
--- a/Workshop - 6 (GA, SOM).ipynb	
+++ b/Workshop - 6 (GA, SOM).ipynb	
@@ -69,7 +69,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "There are problems at different levels. **3 simple, 2 medium, 1 difficult**."
+    "There are problems at different levels. **3 easy, 2 medium, 1 difficult**."
    ]
   },
   {
@@ -92,7 +92,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ulysses16 = np.array(load_data(\"./template/data/simple/ulysses16.tsp\"))"
+    "ulysses16 = np.array(load_data(\"./template/data/easy/ulysses16.tsp\"))"
    ]
   },
   {
@@ -309,7 +309,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_file = './template/data/simple/ulysses16.tsp'"
+    "tsp_file = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
@@ -524,7 +524,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_problem = \"./template/data/simple/ulysses16.tsp\""
+    "tsp_problem = \"./template/data/easy/ulysses16.tsp\""
    ]
   },
   {
@@ -621,7 +621,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "tsp_problem = './template/data/simple/ulysses16.tsp'"
+    "tsp_problem = './template/data/easy/ulysses16.tsp'"
    ]
   },
   {
diff --git a/template/data/simple/att48.tsp b/template/data/easy/att48.tsp
similarity index 100%
rename from template/data/simple/att48.tsp
rename to template/data/easy/att48.tsp
diff --git a/template/data/simple/st70.tsp b/template/data/easy/st70.tsp
similarity index 100%
rename from template/data/simple/st70.tsp
rename to template/data/easy/st70.tsp
diff --git a/template/data/simple/ulysses16.tsp b/template/data/easy/ulysses16.tsp
similarity index 100%
rename from template/data/simple/ulysses16.tsp
rename to template/data/easy/ulysses16.tsp
diff --git a/template/main.py b/template/main.py
index 32851b7..22acfdb 100644
--- a/template/main.py
+++ b/template/main.py
@@ -9,18 +9,18 @@ if __name__ == "__main__":
 
     parser = argparse.ArgumentParser()
 
-    parser.add_argument('-s', '--simple', action='store_true', help='Benchmark all simple level TSP')
+    parser.add_argument('-e', '--easy', action='store_true', help='Benchmark all easy level TSP')
     parser.add_argument('-m', '--medium', action='store_true', help='Benchmark all medium level TSP')
     parser.add_argument('-d', '--difficult', action='store_true', help='Benchmark all difficult level TSP')
 
     args = parser.parse_args()
 
-    if (args.simple):
-        TSP_Bench_PATH("./data/simple/", MyModel, timeout=60)
+    if (args.easy):
+        TSP_Bench_PATH("./data/easy/", MyModel, timeout=60)
     if (args.medium):
     	TSP_Bench_PATH("./data/medium/", MyModel, timeout=180)
     if (args.difficult):
-        TSP_Bench_PATH("data/difficult/", MyModel, timeout=300)
+        TSP_Bench_PATH("./data/difficult/", MyModel, timeout=300)
 
-    if( (not args.simple) and (not args.medium) and (not args.difficult) ):
+    if( (not args.easy) and (not args.medium) and (not args.difficult) ):
         TSP_Bench_ALL('./', MyModel)
diff --git a/template/model/my_model.py b/template/model/my_model.py
index a0fcc62..301adec 100644
--- a/template/model/my_model.py
+++ b/template/model/my_model.py
@@ -1,5 +1,6 @@
 import math
-import random
+import numpy as np
+
 from model.base_model import Model
 
 class MyModel(Model):
diff --git a/template/tsp.py b/template/tsp.py
index 2fbade1..1dd746c 100644
--- a/template/tsp.py
+++ b/template/tsp.py
@@ -51,7 +51,7 @@ def TSP(tsp_file, model, timeout=60):
             with open('output/' + os.path.splitext(os.path.basename(tsp_file))[0] + '.txt', "w") as outfile:
                 outfile.write("-3")
         elif (len(best_solution) == 0):
-            print(exec)
+            print(exc)
             log("No Answer -1")
             with open('output/' + os.path.splitext(os.path.basename(tsp_file))[0] + '.txt', "w") as outfile:
                 outfile.write("-1")
@@ -145,19 +145,19 @@ def TSP_Bench_ALL(root, model):
     fitness_lists_all = []
     times_all = []
 
-    best_solutions_simple, fitness_lists_simple, times_simple = TSP_Bench_PATH(os.path.join(root, "data/simple/"), model, timeout=60)
+    best_solutions_easy, fitness_lists_easy, times_easy = TSP_Bench_PATH(os.path.join(root, "data/easy/"), model, timeout=60)
     best_solutions_medium, fitness_lists_medium, times_medium = TSP_Bench_PATH(os.path.join(root, "data/medium/"), model, timeout=180)
     best_solutions_difficult, fitness_lists_difficult, times_difficult = TSP_Bench_PATH(os.path.join(root, "data/difficult/"), model, timeout=300)
 
-    best_solutions_all.append(best_solutions_simple)
+    best_solutions_all.append(best_solutions_easy)
     best_solutions_all.append(best_solutions_medium)
     best_solutions_all.append(best_solutions_difficult)
 
-    fitness_lists_all.append(fitness_lists_simple)
+    fitness_lists_all.append(fitness_lists_easy)
     fitness_lists_all.append(fitness_lists_medium)
     fitness_lists_all.append(fitness_lists_difficult)
 
-    times_all.append(times_simple)
+    times_all.append(times_easy)
     times_all.append(times_medium)
     times_all.append(times_difficult)
 
diff --git a/template/tsp.pyc b/template/tsp.pyc
new file mode 100644
index 0000000..3bfd491
Binary files /dev/null and b/template/tsp.pyc differ