diff --git a/a1/output/program.exe b/a1/output/program.exe
index 693458d..277cc63 100644
Binary files a/a1/output/program.exe and b/a1/output/program.exe differ
diff --git a/a1/program.c b/a1/program.c
index c4c0ca5..5ebf77e 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -7,43 +7,86 @@ int proverka(char otv, char zatv) {
     if (otv == '(' && zatv == ')') {
         return 1;
     }
-    if (otv == '{' && zatv == '}') {
+    else if (otv == '{' && zatv == '}') {
         return 1;
     }
-    if (otv == '[' && zatv == ']') {
+    else if (otv == '[' && zatv == ']') {
         return 1;
     }
-    if (otv == '<' && zatv == '>') {
+    else if (otv == '<' && zatv == '>') {
         return 1;
     }
-    return 0;
+    else {
+        return 0;
+    }
 }
 
 int main() {
     char riadok[MAX_SIZE];
     char zasobnik[MAX_SIZE];
     int vrch = -1;
-    int i;
     int chyba = 0;
     char znak;
 
-    if (fgets(riadok, MAX_SIZE, stdin)==NULL) {
+    if (fgets(riadok, MAX_SIZE, stdin) == NULL) {
         printf("Input Error!\n");
         return 1;
     }
 
-    riadok[strcspn(riadok, "\n")]=='0';
-
+    riadok[strcspn(riadok, "\n")] = '\0';
     printf("Read: %s\n", riadok);
 
     int dlzka = strlen(riadok);
 
     for (int i = 0; i < dlzka; i++) {
         znak = riadok[i];
-         zasobnik[++vrch] = znak; 
-    } else if (znak == ')' || znak == ']' || znak == '}' || znak == '>') {
-        
+
+        if (znak == '(' || znak == '[' || znak == '{' || znak == '<') {
+            zasobnik[++vrch] = znak;
+        }
+        else if (znak == ')' || znak == ']' || znak == '}' || znak == '>') {
+            if (vrch < 0) {
+                printf("Unexpected closing bracket %c in %d\n", znak, i + 1);
+                chyba = 1;
+                break;
+            }
+
+            if (!proverka(zasobnik[vrch], znak)) {
+                char ocakavany;
+                switch (zasobnik[vrch]) {
+                    case '(':
+                        ocakavany = ')';
+                        break;
+                    case '[':
+                        ocakavany = ']';
+                        break;
+                    case '{':
+                        ocakavany = '}';
+                        break;
+                    case '<':
+                        ocakavany = '>';
+                        break;
+                    default:
+                        ocakavany = '?';
+                        break;
+                }
+                printf("Crossed bracket %c in %d, expected %c\n", znak, i + 1, ocakavany);
+                chyba = 1;
+                break;
+            }
+
+            vrch--;
+        }
     }
-    
+
+    if (!chyba && vrch >= 0) {
+        printf("Unclosed bracket %c at the end\n", zasobnik[vrch]);
+        chyba = 1;
+    }
+
+    if (!chyba) {
+        printf("All brackets OK\n");
+    }
+
     return 0;
-}
\ No newline at end of file
+}