diff --git a/Calcul_itin_score.py b/Calcul_itin_score.py
new file mode 100644
index 0000000..ce7e046
--- /dev/null
+++ b/Calcul_itin_score.py
@@ -0,0 +1,95 @@
+import math
+import itertools
+import googlemaps
+import datetime
+import json
+
+RETRIEVAL_TIME = 5
+
+'''
+ENTREE: time = le temps de depart
+        arrival_node = le noeud destination sous la forme [coordonnee, debut horraire, fin horraire, gain]
+        duration = la duree du trajet entre le depart et la destination
+OBJECTIF: donner le temps du trajet avec le possible temps d'attente
+SORTIE: la duree totale en minute
+'''
+def time_between_node(time, arrival_node, duration):
+    if arrival_node[1] != None and (time + datetime.timedelta(minutes = duration) + datetime.timedelta(minutes = RETRIEVAL_TIME)) < arrival_node[1]:
+        result = arrival_node[1] - time
+        return (result.total_seconds()/60 + RETRIEVAL_TIME)
+    else:
+        if arrival_node[2] != None and (time + datetime.timedelta(minutes = duration) + RETRIEVAL_TIME) > arrival_node[2]:
+            return 100000
+        else:
+            return (duration/60 + RETRIEVAL_TIME)
+
+'''
+ENTREE: node = tous les noeuds sous forme de liste
+        mode_transport = le mode de transport
+        gmaps = pour utiliser google api avec la bonne cle
+OBJECTIF: calcule tous les arcs entre les noeuds
+SORTIE: retoure une liste d'arc sous la forme [1er noeud, 2eme noeud, distance en metre, duree en secondes]
+'''
+def calculate_path(node, mode_transport, gmaps):
+  path = []
+  for i in node:
+      for j in node:
+          if (j!=i) :
+              distance = gmaps.distance_matrix(i[0],j[0],mode = mode_transport)
+              path.append([i,j,distance["rows"][0]["elements"][0]["distance"]["value"],distance["rows"][0]["elements"][0]["duration"]["value"]])
+  return path
+
+'''
+ENTREE: node = tous les noeuds sous forme de liste
+        alpha = critere d'importance de la duree
+        beta = critere d'importance du gain
+        departure = la date et temps de depart
+OBJECTIF: calcule le parcours le plus avantageux
+SORTIE: la liste des noeuds dans le meilleur ordre
+'''
+def shortest_path(node, aplha, beta, departure):
+    score = 0
+    time = 0
+    date = departure
+    cp=0
+    result = []
+    gmaps = googlemaps.Client(key='AIzaSyDRpQO4ww7fK610iK5Np-GeiPbCSTuaqec')
+    itinerary = calculate_path(node, "driving", gmaps)
+    
+    for nb_node in range(2,len(node) + 1):
+        for subset in itertools.permutations(node, nb_node):
+            if(subset[0] == node[0]):
+                i = 0
+                while (time < 100000) and i < (len(subset) - 1):
+                    j = 0
+                    while (time < 100000) and j <(len(itinerary)):
+                        if itinerary[j][0] == subset[i] and itinerary[j][1] == subset[i + 1]:
+                            time = time_between_node(date, subset[i + 1] , itinerary[j][3])
+                            date = date + datetime.timedelta(minutes = time)
+                            score = score + (alpha*time - beta*subset[i + 1][3])
+                        j = j + 1
+                    i = i + 1
+                full_score = score
+                if(cp == 0):
+                    min_score = full_score
+                    cp = cp + 1
+                    result = subset
+                else:
+                    if(min_score > full_score):
+                        min_score = full_score
+                        result = subset
+                score = 0
+    return result
+
+#test pour les horaires
+dep = datetime.datetime(2017,1,6,11,0,0)
+a = datetime.datetime(2017,1,6,12,0,0)
+b = datetime.datetime(2017,1,6,14,0,0)
+
+#test noeud
+test_noeud = [[(43.6005543,1.4038282),None,None,0,5],[(43.620068, 1.435757),None,None,10,5],[(43.606521, 1.465111),None,None,10,5],[(43.602729, 1.452065),None,None,0,5],[(43.612238, 1.427174),None,None,0,5]]
+alpha = 0.3 #importance de la duree du trajet
+beta = 1 #importance du gain
+
+
+print shortest_path(test_noeud, alpha, beta, dep)