diff --git a/cv6/a_station.c b/cv6/a_station.c
index 257f800..f56d75b 100644
--- a/cv6/a_station.c
+++ b/cv6/a_station.c
@@ -3,7 +3,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-struct station* create_station(){
+
+  struct station* create_station(){
    struct station* station = (struct station*)calloc(1,sizeof(struct station));
    station->tracks = (struct car**)calloc(STATION_SIZE, sizeof(struct car*));
    station->track_count = STATION_SIZE;
@@ -21,40 +22,38 @@ int select_track(struct station* station, const char* target)
     char t=0;
     while(target[i]!=0)
     {
-      t+=target[i];  
+      t+=target[i++]; 
     }
     if(t<0) {t=-t;}
     
-    i=t%10; 
+    i=t%10;     
     
-    
-     
     return i;
 }
 
-void add_target_capacity(struct station* station,const char* target, int capacity)
+void add_target_capacity(struct station* station, const char* target, int capacity)
 {
-    int i=select_track(station, target);
-
-    struct car *nwcar = (struct car*)calloc(STATION_SIZE, sizeof(struct car));
-    nwcar->next=NULL;
-    strcpy(nwcar->value, target);
-    nwcar->capacity=capacity;
-
-    if(station->tracks[i]==NULL)
-    {        
-        station->tracks[i]=nwcar;
+    int i = select_track(station, target);
+    struct car* p = station->tracks[i];
+    
+    while (p != NULL)
+    {
+        if (strcmp(p->value, target) == 0)
+        {            
+            p->capacity = capacity;
+            return;
+        }
+        p = p->next;
     }
 
-    struct car* start = station->tracks[i];
-    struct car* this = start;    
-    while(this->next != NULL)
-    {        
-        this=this->next;
-    }
-    this->next=nwcar;
+    struct car* new_car = (struct car*)calloc(1, sizeof(struct car));
+    strcpy(new_car->value, target);
+    new_car->capacity = capacity;
+    new_car->next = station->tracks[i];
+    station->tracks[i] = new_car;
 }
 
+
 int get_target_capacity(struct station* station,const char* target)
 {
      int i=select_track(station, target);
@@ -103,5 +102,3 @@ int count_capacity(struct station* station){
     }
     return k;
 }
-
-