diff --git a/cv3/program.c b/cv3/program.c
index 1b0c9b2..2d8cf6a 100644
--- a/cv3/program.c
+++ b/cv3/program.c
@@ -99,7 +99,7 @@ int main() {
         else if (sscanf(vstup, "%c", &operacia) == 1) {
             if (!je_platna_operacia(operacia)) {
                 printf("bad input\n");
-                continue; 
+                return 0;
             }
             switch (operacia) {
                 case '+':