diff --git a/du6/program.c b/du6/program.c
index b1bef47..3be8e7e 100644
--- a/du6/program.c
+++ b/du6/program.c
@@ -21,7 +21,7 @@ struct LIS list[100];
 int places=0;
 int k;
 k=scanf("%d",&places);
-if(k!=1 || places<0){
+if(k!=1 || places<=0){
     puts("Nespravny vstup");
 }
 else{