diff --git a/main.cpp b/main.cpp
index 47ee8ed..2a4e38d 100644
--- a/main.cpp
+++ b/main.cpp
@@ -6,6 +6,11 @@ int add(int a, int b) {
 }
 
 int main() {
+    int a,b;
+    cin >> a >> b;
+    if (a<0) exit(1);
+    if (b<0) exit(1);
+
     cout << add(3, -2) << endl;
     return 0;
 }
\ No newline at end of file