diff --git a/head.c b/head.c
index 76bd33d..5b57d1b 100755
--- a/head.c
+++ b/head.c
@@ -4,8 +4,6 @@
 #include <stdlib.h>
 #include <unistd.h>
 
-int stoi_mini(char * str);
-
 int main(int argc, char *argv[]) {
   FILE * current_input_file;
   int i = 1, j = 0; char c;
@@ -15,14 +13,13 @@ int main(int argc, char *argv[]) {
 
   int error_occurred;
 
-  
-  if(argv[i][0] == '-') {
-    if(argv[i][1] == 'n') {
-      i++;
-      chars_copy = stoi_mini(argv[i]);
-      i++;
+  while((c = getopt(argc, argv, "n:")) != -1) {
+    if(c == 'n') {
+      chars_copy = atoi(optarg);
     }
   }
+  
+  i = optind;
 
   if(argc - i > 1) {
     print_head = 1;
@@ -65,27 +62,4 @@ int main(int argc, char *argv[]) {
   else {
     return 0;
   }
-}
-
-int stoi_mini(char * str) {
-  int i, str_int = 0;
-
-  for(i = 0; str[i] != '\0' && str[i] != ','; i++) {
-    str_int *= 10;
-    switch(str[i]) {
-      case '0': str_int += 0; break;
-      case '1': str_int += 1; break;
-      case '2': str_int += 2; break;
-      case '3': str_int += 3; break;
-      case '4': str_int += 4; break;
-      case '5': str_int += 5; break;
-      case '6': str_int += 6; break;
-      case '7': str_int += 7; break;
-      case '8': str_int += 8; break;
-      case '9': str_int += 9; break;
-      default: return -1;
-    }
-  }
-
-  return str_int;
-}
+}
\ No newline at end of file