diff --git a/a1/program.c b/a1/program.c
index 33ed988..712e79d 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -63,8 +63,8 @@ int reading_strings_and_storing_them_in_memory(link* pointer_to_start_of_chain){
 }
 int analizing_string(char* pointer){
     float number1, number2, result3;
-
-
+    char buffer_for_token[SIZE];
+    strcpy(buffer_for_token,pointer);
     int counter=0;
     char operant;
     int i=0;
@@ -82,7 +82,7 @@ int analizing_string(char* pointer){
 
     char delim[] =" +=-*/\n";
 
-    char *first_number_cucumber=strtok(pointer, delim);
+    char *first_number_cucumber=strtok(buffer_for_token, delim);
 
     if(first_number_cucumber==NULL||is_number_question_mark(first_number_cucumber)==0){