diff --git a/a1/program.c b/a1/program.c
index bfb66f7..8792eba 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -2,7 +2,58 @@
 #define MAX 100
 
 void serch_zatv(char vhod[MAX]){
-    printf("%s", vhod);
+    
+    char first[2] = "{}";
+    char second[2] = "[]";
+    char thrid[2] = "<>";
+    char fourth[2] = "()";
+    int idx = 0;
+    int idt = 0;
+    char find[50];
+    
+    while(vhod[idx] != "\0"){
+    
+    if(vhod[idx] == first[0]){
+        find[idt] = first[1];
+        idt++;
+    }
+
+    if(vhod[idx] == second[0]){
+         find[idt] = second[1];
+        idt++;
+    }
+    
+    if(vhod[idx] == thrid[0]){
+         find[idt] = thrid[1];
+        idt++;
+    }
+
+    if(vhod[idx] == fourth[0]){
+         find[idt] = fourth[1];
+        idt++;
+    }
+
+    for(int i = 0; i < idt; i++){
+        if(vhod[idx] = find[i]){
+            find[i] = ".";
+            for(int r = i + 1; i < idt; r++){
+                if(find[r] != "." || find[r] != "\0"){
+                    printf("Crossed bracket %c in %d, expected %c", vhod[idx], idx, find[idt]);
+                    return 0;
+                }
+            }
+        }
+    }
+
+    idx++;
+    }
+    for(int i = 0; i < idt){
+        if(find[i] != "." || find[i] != "\0"){
+            printf("herna);
+            return 0;
+        }
+    }
+    printf("All brackets OK");
 }