diff --git a/NN/stackpair.c b/NN/stackpair.c
index eb54959be58de75d4175d17973a8ab0b23510d87..ad4268226191054c8d4d287dbaf11e4a1fb91f5c 100644
--- a/NN/stackpair.c
+++ b/NN/stackpair.c
@@ -1,58 +1,58 @@
-	static struct node
-	{ int key; struct node *next; };
-	static struct node *heada, *za, *ta;
-	static struct node *headb, *zb, *tb;
-	stackpairinit_() 
-	   {
-	     heada = (struct node *) malloc(sizeof *heada);
-	     za = (struct node *) malloc(sizeof *za);
-	     heada->next = za; heada->key=0;
-	     za->next = za;
-	     za->key = 0;
-
-	     headb = (struct node *) malloc(sizeof *headb);
-	     zb = (struct node *) malloc(sizeof *zb);
-	     headb->next = zb; headb->key=0;
-	     zb->next = zb;
-	     zb->key = 0;
-	   }
-	stackpairflush_() 
-	   {
-             free(heada);
-             free(headb);
-             free(za);
-             free(zb);
-	   }
-	pushpair_(pa, pb)
-             int *pa;
-             int *pb;
-	   {
-	     int va;
-	     int vb;
-	     va = *pa;
-	     ta = (struct node *) malloc(sizeof *ta);	
-	     ta->key = va; ta->next = heada->next;	
-	     heada->next =ta;	
-
-	     vb = *pb;
-	     tb = (struct node *) malloc(sizeof *tb);	
-	     tb->key = vb; tb->next = headb->next;	
-	     headb->next =tb;	
-	   }
-	poppair_(xa,xb)
-             int *xa;
-             int *xb;
-	   {
-	     ta = heada->next; heada->next = ta->next;
-	     *xa = ta->key;
-	     free(ta);
-	     tb = headb->next; headb->next = tb->next;
-	     *xb = tb->key;
-	     free(tb);
-	   }
-	stackpairempty_(i)
-            int *i;
-	  { 
-	    *i = 0;
-            if(heada->next == za) *i = 1;
-          }
+	static struct node
+	{ int key; struct node *next; };
+	static struct node *heada, *za, *ta;
+	static struct node *headb, *zb, *tb;
+	stackpairinit() 
+	   {
+	     heada = (struct node *) malloc(sizeof *heada);
+	     za = (struct node *) malloc(sizeof *za);
+	     heada->next = za; heada->key=0;
+	     za->next = za;
+	     za->key = 0;
+
+	     headb = (struct node *) malloc(sizeof *headb);
+	     zb = (struct node *) malloc(sizeof *zb);
+	     headb->next = zb; headb->key=0;
+	     zb->next = zb;
+	     zb->key = 0;
+	   }
+	stackpairflush() 
+	   {
+             free(heada);
+             free(headb);
+             free(za);
+             free(zb);
+	   }
+	pushpair(pa, pb)
+             int *pa;
+             int *pb;
+	   {
+	     int va;
+	     int vb;
+	     va = *pa;
+	     ta = (struct node *) malloc(sizeof *ta);	
+	     ta->key = va; ta->next = heada->next;	
+	     heada->next =ta;	
+
+	     vb = *pb;
+	     tb = (struct node *) malloc(sizeof *tb);	
+	     tb->key = vb; tb->next = headb->next;	
+	     headb->next =tb;	
+	   }
+	poppair(xa,xb)
+             int *xa;
+             int *xb;
+	   {
+	     ta = heada->next; heada->next = ta->next;
+	     *xa = ta->key;
+	     free(ta);
+	     tb = headb->next; headb->next = tb->next;
+	     *xb = tb->key;
+	     free(tb);
+	   }
+	stackpairempty(i)
+            int *i;
+	  { 
+	    *i = 0;
+            if(heada->next == za) *i = 1;
+          }
diff --git a/NN/stackpair.cc b/NN/stackpair.cc
deleted file mode 100644
index ad4268226191054c8d4d287dbaf11e4a1fb91f5c..0000000000000000000000000000000000000000
--- a/NN/stackpair.cc
+++ /dev/null
@@ -1,58 +0,0 @@
-	static struct node
-	{ int key; struct node *next; };
-	static struct node *heada, *za, *ta;
-	static struct node *headb, *zb, *tb;
-	stackpairinit() 
-	   {
-	     heada = (struct node *) malloc(sizeof *heada);
-	     za = (struct node *) malloc(sizeof *za);
-	     heada->next = za; heada->key=0;
-	     za->next = za;
-	     za->key = 0;
-
-	     headb = (struct node *) malloc(sizeof *headb);
-	     zb = (struct node *) malloc(sizeof *zb);
-	     headb->next = zb; headb->key=0;
-	     zb->next = zb;
-	     zb->key = 0;
-	   }
-	stackpairflush() 
-	   {
-             free(heada);
-             free(headb);
-             free(za);
-             free(zb);
-	   }
-	pushpair(pa, pb)
-             int *pa;
-             int *pb;
-	   {
-	     int va;
-	     int vb;
-	     va = *pa;
-	     ta = (struct node *) malloc(sizeof *ta);	
-	     ta->key = va; ta->next = heada->next;	
-	     heada->next =ta;	
-
-	     vb = *pb;
-	     tb = (struct node *) malloc(sizeof *tb);	
-	     tb->key = vb; tb->next = headb->next;	
-	     headb->next =tb;	
-	   }
-	poppair(xa,xb)
-             int *xa;
-             int *xb;
-	   {
-	     ta = heada->next; heada->next = ta->next;
-	     *xa = ta->key;
-	     free(ta);
-	     tb = headb->next; headb->next = tb->next;
-	     *xb = tb->key;
-	     free(tb);
-	   }
-	stackpairempty(i)
-            int *i;
-	  { 
-	    *i = 0;
-            if(heada->next == za) *i = 1;
-          }