diff --git a/analyseur.c b/analyseur.c
index 1192fd0..218031e 100644
--- a/analyseur.c
+++ b/analyseur.c
@@ -102,7 +102,7 @@ int est_lettre(char c)
 /* Génération du texte                                                      */
 /* ------------------------------------------------------------------------ */
 
-static const char *MOTS_VIDES[] = {
+static char *MOTS_VIDES[] = {
     "le", "la", "les", "un", "une", "des", "du", "de", "et", "ou",
     "mais", "donc", "or", "ni", "car", "que", "qui", "quoi", "dont", "ou",
     "a", "au", "aux", "en", "dans", "par", "pour", "sur", "sous", "avec",
@@ -226,12 +226,44 @@ typedef struct {
     int occurrences;
 } Entree;
 
+
+
+
+int doit_bouger(const char *a, const char *b)
+{
+    return comparer(a, b) > 0;
+}
+
+
+void trier_mots_vides()
+{
+    for (int i = 0; i < NB_MOTS_VIDES - 1; i++) {
+        for (int j = 0; j < NB_MOTS_VIDES - 1 - i; j++) {
+            if (doit_bouger(&MOTS_VIDES[j], &MOTS_VIDES[j + 1])) {
+                char tmp = *MOTS_VIDES[j];
+                MOTS_VIDES[j] = MOTS_VIDES[j + 1];
+                MOTS_VIDES[j + 1] = &tmp;
+            }
+        }
+    }
+}
+
+
+
 int est_mot_vide(const char *mot)
 {
-    for (int i = 0; i < NB_MOTS_VIDES; i++) {
-        if (egales(mot, MOTS_VIDES[i]))
+    int borne_min = 0;
+    int borne_max = NB_MOTS_VIDES;
+    while(borne_min < borne_max){
+        int i = (borne_max - borne_min)/2 +borne_min;
+        if (egales(mot,MOTS_VIDES[i]))
             return 1;
+        if (comparer(mot,MOTS_VIDES[i]) > 1) 
+            borne_min = i;
+        else 
+            borne_max = i;
     }
+
     return 0;
 }
 
@@ -403,6 +435,7 @@ double racine(double x)
 
 int main(void)
 {
+    trier_mots_vides();
     char **vocab = generer_vocabulaire();
     char *texte = generer_texte(vocab, NB_MOTS_TEXTE);