diff --git a/a1/program.c b/a1/program.c
index ab559f8..1b1d3e6 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -9,9 +9,10 @@ int main()
     long double arr[50]={0};
   	scanf("%lf",&x);
     while(scanf("%Lf",&value)!=EOF){
-        //if(isalpha(value)!=0){
-         //   return 0;
-        //}
+        if(isdigit(value)==0){
+          printf("Nepodarilo sa nacitat x\n");  
+          return 0;
+        }
         arr[count]=value;
         count++;
     }