diff --git a/a.txt b/a.txt
index 78edceb..67e84d8 100644
--- a/a.txt
+++ b/a.txt
@@ -31,39 +31,40 @@ make[2]: Leaving directory '/home/eason/Documents/project/HW11'
 [100%] Built target homework_11
 make[1]: Leaving directory '/home/eason/Documents/project/HW11'
 /usr/bin/cmake -E cmake_progress_start /home/eason/Documents/project/HW11/CMakeFiles 0
-the number of prefixes with prefix length 0 = 0
-the number of prefixes with prefix length 1 = 0
-the number of prefixes with prefix length 2 = 0
-the number of prefixes with prefix length 3 = 1
-the number of prefixes with prefix length 4 = 0
-the number of prefixes with prefix length 5 = 1
-the number of prefixes with prefix length 6 = 3
-the number of prefixes with prefix length 7 = 4
-the number of prefixes with prefix length 8 = 107
-the number of prefixes with prefix length 9 = 3
-the number of prefixes with prefix length 10 = 5
-the number of prefixes with prefix length 11 = 9
-the number of prefixes with prefix length 12 = 47
-the number of prefixes with prefix length 13 = 70
-the number of prefixes with prefix length 14 = 164
-the number of prefixes with prefix length 15 = 317
-the number of prefixes with prefix length 16 = 6117
-the number of prefixes with prefix length 17 = 1083
-the number of prefixes with prefix length 18 = 1769
-the number of prefixes with prefix length 19 = 4489
-the number of prefixes with prefix length 20 = 5553
-the number of prefixes with prefix length 21 = 4246
-the number of prefixes with prefix length 22 = 6090
-the number of prefixes with prefix length 23 = 7772
-the number of prefixes with prefix length 24 = 43679
-the number of prefixes with prefix length 25 = 383
-the number of prefixes with prefix length 26 = 387
-the number of prefixes with prefix length 27 = 439
-the number of prefixes with prefix length 28 = 338
-the number of prefixes with prefix length 29 = 989
-the number of prefixes with prefix length 30 = 454
-the number of prefixes with prefix length 31 = 1
-the number of prefixes with prefix length 32 = 113
+The total number of prefixes in the input file is : 84633.
+the number of prefixes with prefix length 0 = 0.
+the number of prefixes with prefix length 1 = 0.
+the number of prefixes with prefix length 2 = 0.
+the number of prefixes with prefix length 3 = 1.
+the number of prefixes with prefix length 4 = 0.
+the number of prefixes with prefix length 5 = 1.
+the number of prefixes with prefix length 6 = 3.
+the number of prefixes with prefix length 7 = 4.
+the number of prefixes with prefix length 8 = 107.
+the number of prefixes with prefix length 9 = 3.
+the number of prefixes with prefix length 10 = 5.
+the number of prefixes with prefix length 11 = 9.
+the number of prefixes with prefix length 12 = 47.
+the number of prefixes with prefix length 13 = 70.
+the number of prefixes with prefix length 14 = 164.
+the number of prefixes with prefix length 15 = 317.
+the number of prefixes with prefix length 16 = 6117.
+the number of prefixes with prefix length 17 = 1083.
+the number of prefixes with prefix length 18 = 1769.
+the number of prefixes with prefix length 19 = 4489.
+the number of prefixes with prefix length 20 = 5553.
+the number of prefixes with prefix length 21 = 4246.
+the number of prefixes with prefix length 22 = 6090.
+the number of prefixes with prefix length 23 = 7772.
+the number of prefixes with prefix length 24 = 43679.
+the number of prefixes with prefix length 25 = 383.
+the number of prefixes with prefix length 26 = 387.
+the number of prefixes with prefix length 27 = 439.
+the number of prefixes with prefix length 28 = 338.
+the number of prefixes with prefix length 29 = 989.
+the number of prefixes with prefix length 30 = 454.
+the number of prefixes with prefix length 31 = 1.
+the number of prefixes with prefix length 32 = 113.
 | 00000000 |
 | 00000001 | ---> | 1.0.0.0 |
 | 00000010 | ---> | 2.0.0.0 |
diff --git a/homework_11 b/homework_11
index a5edad5..74c799a 100755
Binary files a/homework_11 and b/homework_11 differ
diff --git a/src/v1.c b/src/v1.c
index c5d6aed..c849463 100644
--- a/src/v1.c
+++ b/src/v1.c
@@ -7,18 +7,23 @@
 
 void input(struct State* state){
     FILE * table = fopen("routing_table.txt","r");
-    
+    usize amount=0;
+
     while(true){
         char buffer[20]={'\0'};
         fgets(buffer,20,table);
         if(*buffer=='\0') break;
 
+        amount++;
+
         struct SizedSubmask* mask=malloc(sizeof(struct SizedSubmask));
         parse_submask(buffer,mask);
         if(mask<10000)printf("%zu\n",mask);
 
         state->head=xor_insert_mid(NULL,state->head,mask);
     }
+    printf("The total number of prefixes in the input file is : %zu.\n",amount);
+
 }
 
 void length_distribution(struct State* state){
@@ -37,5 +42,5 @@ void length_distribution(struct State* state){
     }
 
     for(usize i=0;i<=32;i++)
-        printf("the number of prefixes with prefix length %zu = %zu\n",i,lens[i]);
+        printf("the number of prefixes with prefix length %zu = %zu.\n",i,lens[i]);
 }
\ No newline at end of file
diff --git a/src/v3.c b/src/v3.c
index cb78060..5ed492e 100644
--- a/src/v3.c
+++ b/src/v3.c
@@ -58,7 +58,7 @@ void prefix_insert(struct State* state){
         parse_submask(buffer,mask);
         struct SizedSubmask* ip=clone_submask(mask);
 
-        // record_start
+        record_start
 
         if(reduce_submask(mask)){
             struct Node* ll=hash_pop(state->hashmap,mask);
@@ -67,7 +67,7 @@ void prefix_insert(struct State* state){
             hash_insert(state->hashmap,mask,new);
         }else state->head=xor_insert_mid(NULL,state->head,ip);
         
-        // record_end("prefix_insert.csv")
+        record_end("prefix_insert.csv")
 
         freq++;
     }
@@ -93,6 +93,9 @@ void prefix_delete(struct State* state){
 
         if(reduce_submask(mask)){
             struct Node* ll=hash_pop(state->hashmap,mask);
+            if(ll==NULL){
+                log_warn("not found");
+            }
             struct Node* new_head=xor_remove_match(ll,ip,eq_v3);
 
             if(new_head!=NULL)hash_insert(state->hashmap,mask,new_head);
@@ -105,7 +108,6 @@ void prefix_delete(struct State* state){
 
         record_end("prefix_delete.csv")
 
-
         free(ip);
     }