diff --git a/du3/program.c b/du3/program.c
index 1a851bb..871ef75 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -67,16 +67,40 @@ int main()
             num2Temp[0] = '\0';
             resultTemp[0] = '\0';
             bool foundEqualSign = false;
-            bool isNegativeSign = false;
 
             char op1 = 'N';  //N = 'None/NIC'
 
+
             for (int i = 0; strBuffer[i] != '\0'; i++)
             {
+                bool isNegativeSign = false;
+                
                 if (isspace(strBuffer[i]) != 0)
                 {
                     continue;
                 }
+                else if (strBuffer[i] == '-')
+                {
+                    //kontrola - zistenie, ze ci znak '-' symbolizuje zapornu hodnotu (-456) alebo arit. operaciu minus
+                    //zistujeme to na zaklade toho, kde sme v riadku (ak sme na zaciatku num1, num2 alebo vyslednehoCisla, tak sa jedna o minusove znamienko)
+                    if (op1 == 'N' && strlen(num1Temp) == 0)
+                    {
+                        isNegativeSign = true;
+                    }
+                    else if (op1 != 'N' && !foundEqualSign && strlen(num2Temp) == 0)
+                    {
+                        isNegativeSign = true;
+                    }
+                    else if (foundEqualSign && strlen(resultTemp) == 0)
+                    {
+                        isNegativeSign = true;
+                    }
+                }
+                else
+                {
+                    isLineInvalid = true;
+                    break;
+                }
                 else if (isdigit(strBuffer[i]) != 0 || strBuffer[i] == '.') 
                 {
                     //cislo sa bude zapisovat podla toho, kde sme pri citani riadku...
@@ -105,34 +129,13 @@ int main()
                 else if (strBuffer[i] == '+' || strBuffer[i] == '-' || strBuffer[i] == '/' || strBuffer[i] == '*')
                 {
                     //predbezna kontrola, ak uz operator mame tak vyhod chybu pri druhom pokuse o nacitanie
+                    //taktiez, ak sa nasiel minusovy znak tu tak to moze byt len arit. znamienko
                     if (op1 != 'N')
                     {
                         isLineInvalid = true;
                     }
                     op1 = strBuffer[i];
                 }
-                else if (strBuffer[i] == '-')
-                {
-                    //kontrola - zistenie, ze ci znak '-' symbolizuje zapornu hodnotu (-456) alebo arit. operaciu minus
-                    //zistujeme to na zaklade toho, kde sme v riadku (ak sme na zaciatku num1, num2 alebo vyslednehoCisla, tak sa jedna o minusove znamienko)
-                    if (op1 == 'N' && strlen(num1Temp) == 0)
-                    {
-                        isNegativeSign = true;
-                    }
-                    else if (op1 != 'N' && !foundEqualSign && strlen(num2Temp) == 0)
-                    {
-                        isNegativeSign = true;
-                    }
-                    else if (foundEqualSign && strlen(resultTemp) == 0)
-                    {
-                        isNegativeSign = true;
-                    }
-                }
-                else
-                {
-                    isLineInvalid = true;
-                    break;
-                }
                     
              }