diff --git a/du2/program.c b/du2/program.c
index 1dc35c9..37295d9 100644
--- a/du2/program.c
+++ b/du2/program.c
@@ -18,6 +18,9 @@ int main(){
         value = 0;
         r = scanf("%d", &value);
         pole[i] = value;
+        if(value<0){
+            return EOF;
+        }
 
         if(r == 1){
             i++;