diff --git a/a1/program.c b/a1/program.c
index 5823a0e..ba05f81 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -16,6 +16,14 @@ int isMatching(char open, char close) {
            (open == '<' && close == '>');
 }
 
+char expectedClosing(char open) {
+    if (open == '{') return '}';
+    if (open == '[') return ']';
+    if (open == '(') return ')';
+    if (open == '<') return '>';
+    return '\0';
+}
+
 int main() {
     char input[101];
     char stack[100];
@@ -54,8 +62,9 @@ int main() {
     }
 
      if (top != -1) {
-        printf("Missing closing brackets: %c\n", stack[top]);
-        return 0;
+        char expected = expectedClosing(stack[top]);
+        printf("Missing closing brackets: %c\n", expected);
+        return 1;
     }
 
     printf("All brackets OK\n");