diff --git a/a1/prog b/a1/prog
index 98ec133..5ad5437 100755
Binary files a/a1/prog and b/a1/prog differ
diff --git a/a1/program.c b/a1/program.c
index c31ca05..4662f47 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -4,57 +4,94 @@
 
 #define MAX_SIZE 1000
 
-bool is_valid_brackets(const char* s, int* err) {
+int is_valid_brackets(const char* s, int* err) {
     char stack[MAX_SIZE];
-    int top = -1; 
+    int top = -1;
 
     for (int i = 0; s[i] != '\0'; i++) {
         char c = s[i];
-        if (c == '(' || c == '[' || c == '{') {
+        if (c == '(' || c == '[' || c == '{' || c == '<') {
             if (top < MAX_SIZE - 1) {
                 stack[++top] = c;
             } else {
-                *err= i + 1; 
-                return false;
+                *err = i +1;
+                return 0;
             }
         }
-        else if (c == ')' || c == ']' || c == '}') {
+        else if (c == ')' || c == ']' || c == '}' || c == '>') {
             if (top == -1) {
-                *err= i + 1;
-                return false;
+                *err = i +1;
+                return 0;
             }
-            char last = stack[top--]; 
+            char last = stack[top--];
             if ((c == ')' && last != '(') ||
                 (c == ']' && last != '[') ||
-                (c == '}' && last != '{')) {
-                *err
-     = i + 1; 
-                return false;
+                (c == '}' && last != '{') ||
+                (c == '>' && last != '<')) {
+                *err = i+1;
+                return 0;
             }
         }
     }
     if (top != -1) {
-        *err = strlen(s) + 1; 
-        return false;
+        // Знаходимо позицію незакритої дужки
+        char lastOpen = stack[top];
+        for (int i = 0; s[i] != '\0'; i++) {
+            if (s[i] == lastOpen) {
+                *err = i  +1;
+                return 0;
+            }
+        }
+    }
+    return 1;
+}
+
+
+char getExpectedClosing(char open) {
+    switch (open) {
+        case '(': return ')';
+        case '[': return ']';
+        case '{': return '}';
+        case '<': return '>';
+        default: return '?'; 
     }
-    return true; 
 }
 
 int main() {
     char input[MAX_SIZE];
-    
+
     if (fgets(input, MAX_SIZE, stdin) != NULL) {
         input[strcspn(input, "\n")] = '\0';
-        
+        printf("Read: %s\n", input); // Додано "Read: "
+
         int err = 0;
         if (is_valid_brackets(input, &err)) {
-            printf("True\n");
+            printf("All brackets OK\n"); // Змінено з "True"
         } else {
-            printf("False at position %d\n", err
-);
+            char stack[MAX_SIZE];
+            int top = -1;
+            for (int i = 0; i < err ; i++) {
+                char c = input[i];
+                if (c == '(' || c == '[' || c == '{' || c == '<') {
+                    stack[++top] = c;
+                } else if (c == ')' || c == ']' || c == '}' || c == '>') {
+                    top--;
+                }
+            }
+            char c = input[err - 1];
+            if (c == ')' || c == ']' || c == '}' || c == '>') {
+                if (top == -1) {
+                    printf("Unexpected closing bracket %c in %d\n", c, err-1);
+                } else {
+                    printf("Crossed bracket %c in %d, expected %c\n", c, err-1, getExpectedClosing(stack[top]));
+                }
+            } else {
+                printf("Unclosed bracket %c in %d\n", stack[top], err-1);
+            }
         }
+    } else {
+        printf("Error reading input\n");
     }
-    
+
     return 0;
 }
-