diff --git a/du2/program.c b/du2/program.c
index 5a10bc6..61b422e 100644
--- a/du2/program.c
+++ b/du2/program.c
@@ -6,6 +6,7 @@
 
 int main(){
   int drinks_counter[VELKOST_POLA];
+  memset(drinks_counter,0,VELKOST_POLA * sizeof(int));
   int i=0;  
   while(i<VELKOST_POLA){
     scanf("%d",&drinks_counter[i]);