diff --git a/ypermutation_t/Makefile b/ypermutation_t/Makefile
index 372f924..6490281 100644
--- a/ypermutation_t/Makefile
+++ b/ypermutation_t/Makefile
@@ -2,7 +2,7 @@
 CC=gcc
 TOOLDIR=$(PWD)/../ytools_t
 
-INCLUDE_DIR=$(TOOLDIR)/src
+INCLUDE_DIR=$(TOOLDIR)/include
 CFLAGS=-I$(INCLUDE_DIR) -I./src 
 
 #SRC_DIR=$(ROOT_DIR)/src
diff --git a/ypermutation_t/src/permutation_t/permutation_t.c b/ypermutation_t/src/permutation_t/permutation_t.c
index e31cbd8..f3c3073 100644
--- a/ypermutation_t/src/permutation_t/permutation_t.c
+++ b/ypermutation_t/src/permutation_t/permutation_t.c
@@ -121,7 +121,7 @@ size_t TabToPlaceOpt1_##type(const PERMUTATION_##type *p){\
     }\
     else if (mx > tb[i]) {\
       size_t pli = 0; /* si c est le plus à droite 0 si pas de superieur à lui, on incremente si on trouve plus petit*/\
-      for (size_t j = sz - 1; j > i; j--) {\
+      for (long int j = sz - 1; j > i; j--) {\
         if (tb[i] > tb[j]) {\
           pli++;\
         }\
@@ -174,12 +174,19 @@ size_t TabToPlaceNotab_##type(const PERMUTATION_##type *p){\
 /*complexité sz*sz/2 */\
 PERMUTATION_TYPE_SIZE_T * PlaceToTab_##type(PERMUTATION_##type *p, size_t pl){\
   size_t sz = p->size;\
-  PERMUTATION_TYPE_SIZE_T *t_p = CREATE_PERMUTATION_TYPE_SIZE_T(sz);\
-  size_t *tb= t_p->perm;\
+  /*PERMUTATION_TYPE_SIZE_T *t_p = CREATE_PERMUTATION_TYPE_SIZE_T(sz);*/\
+  PERMUTATION_TYPE_SIZE_T *t_p = TRANSLATE_TO_SET_THEORIC_SIZE_T_##type(p);\
+  type *save_perm = malloc(sz*sizeof(type));\
+  long int *tb= t_p->perm;\
   size_t a = pl;\
   size_t pltbi;\
-  size_t size = 1;\
-  for (long int i = 0;i < sz;i++) tb[i] = 0;\
+  /*size_t size = 1;*/\
+  for (long int i = 0;i < sz;i++) {\
+    /*tb[i] = 0;*/\
+    save_perm[tb[i]]=p->perm[i];\
+    PRINT_DEBUG_("%ld => %s \n",tb[i],type##_TO_STR(p->perm[i]));\
+    tb[i]=0;\
+  }\
 \
   for (long int i = sz - 1; i >= 0; i--) {\
     pltbi = a % (i + 1);\
@@ -188,7 +195,7 @@ PERMUTATION_TYPE_SIZE_T * PlaceToTab_##type(PERMUTATION_##type *p, size_t pl){\
       tb[sz - 1 - pltbi] = i;\
     }\
     else {\
-      size_t lt = 0, j = sz - 1;\
+      long int lt = 0, j = sz - 1;\
       while (lt < pltbi && j >= 0) {\
         if (tb[j--] < i) {\
           lt++;\
@@ -201,7 +208,8 @@ PERMUTATION_TYPE_SIZE_T * PlaceToTab_##type(PERMUTATION_##type *p, size_t pl){\
     }\
   }\
   \
-  for (long int i = 0;i < sz;i++) p->perm[i] = p->perm[tb[i]];\
+  /*for (long int i = 0;i < sz;i++) p->perm[i] = save_perm[tb[i]];*/\
+  for (long int i = 0;i < sz;i++) p->perm[i] = save_perm[tb[i]];\
   return t_p;\
 }\
 \
diff --git a/ypermutation_t/test/is_good.c b/ypermutation_t/test/is_good.c
index d2f62af..56b6c7d 100644
--- a/ypermutation_t/test/is_good.c
+++ b/ypermutation_t/test/is_good.c
@@ -157,30 +157,51 @@ TEST(){
 TEST(){
 
   PERMUTATION_TYPE_CHAR *p_char = CREATE_PERMUTATION_TYPE_CHAR(6);
+ /* 
   p_char->perm[0]='B';
   p_char->perm[1]='A';
   p_char->perm[2]='Y';
   p_char->perm[3]='C';
   p_char->perm[4]='D';
   p_char->perm[5]='Z';
-
+*/
+  p_char->perm[0]='6';
+  p_char->perm[1]='1';
+  p_char->perm[2]='2';
+  p_char->perm[3]='3';
+  p_char->perm[4]='4';
+  p_char->perm[5]='5';
+  p_char->perm[6]='\0';
 
   PRINTF("init :%s \n",p_char->perm);
   PERMUTATION_TYPE_SIZE_T *tab_45 = TRANSLATE_TO_SET_THEORIC_SIZE_T_TYPE_CHAR(p_char);
   for(size_t i=0; i<p_char->size; ++i) PRINTF(" %ld: %ld \n",i, tab_45->perm[i]);
 
+ //
   size_t pl = TabToPlaceAlgo_TYPE_CHAR(p_char);
   //size_t pl = TabToPlaceOpt1_TYPE_CHAR(p_char);
   PRINTF("sa place est :%ld \n", pl);
+  long int rank=450-1;
+  /* in the article the rank is between 1 to n! , here the rank is between 0 to n! -1 */
+   tab_45 = PlaceToTab_TYPE_CHAR(p_char, rank);
 
-  tab_45 = PlaceToTab_TYPE_CHAR(p_char, pl+1);
+   char * expect_res="652413";
+   /*EXPECT_EQ_TYPE_STRING("652413", expect_res);*/ /* the base is 1,2,3,4,5,6 */
+   EXPECT_EQ_TYPE_STRING(expect_res, p_char->perm); /* the base is 1,2,3,4,5,6 */
+
+    /*
+     * for(size_t i=0; i<p_char->size; ++i) PRINTF(" %ld: %ld \n",i, tab_45->perm[i]);
+    PRINTF("ret %ld :%s \n",rank,p_char->perm);
+ 
+  for(long int j=0; j<6; ++j){
+    tab_45 = PlaceToTab_TYPE_CHAR(p_char, j);
+
+    for(size_t i=0; i<p_char->size; ++i) PRINTF(" %ld: %ld \n",i, tab_45->perm[i]);
+    PRINTF("ret %ld :%s \n",j,p_char->perm);
+  }
+    */
 
-  for(size_t i=0; i<p_char->size; ++i) PRINTF(" %ld: %ld \n",i, tab_45->perm[i]);
-/*  tab_45 = PlaceToTab_TYPE_CHAR(p_char,45);
 
-  PRINTF("ret :%s \n",p_char->perm);
-  for(size_t i=0; i<sz; ++i) PRINTF(" %ld: %ld \n",i, tab_45->perm[i]);
-*/
 }
 
 #if 0
diff --git a/ytest_t/libytest.so b/ytest_t/libytest.so
index 16d12e9..8eebb25 100644
Binary files a/ytest_t/libytest.so and b/ytest_t/libytest.so differ
diff --git a/ytools_t/src/tools_t/tools_t.c b/ytools_t/src/tools_t/tools_t.c
index 16f3aa7..0e58668 100644
--- a/ytools_t/src/tools_t/tools_t.c
+++ b/ytools_t/src/tools_t/tools_t.c
@@ -102,8 +102,10 @@ TYPE_STRING TYPE_STRING_TO_STR(TYPE_STRING var){
 int 
 COMPARE_N_TYPE_STRING(const void *a,const  void* b)
 {
-  PRINT_DEBUG_("a=%s, b=%s\n",(char*)a, (char*)b);
-  return strcmp(( char*)a,( char*)b);
+  char **aa=(char**)a;
+  char **bb=(char**)b;
+  PRINT_DEBUG_("a=%s, b=%s\n",*aa, *bb);
+  return strcmp(*aa,*bb);
 }
 
 void COPY_ARRAY_TYPE_STRING(char** dst, const char** src, size_t size)