diff --git a/lec13/th3.c b/lec13/th3.c
index 4c5006b507681d351c054cde578c60116990f082..2ec2f10c40ecea94ec85c69890000c31bcbeaca7 100644
--- a/lec13/th3.c
+++ b/lec13/th3.c
@@ -1,33 +1,35 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <unistd.h>
-   
-int bbb = 0;
-   
+
+int bbb = 0; 
+
 void fn_s()
 {
-	char bufff[10];
-	static int a = 0;
-	setvbuf(stdout,bufff, _IOFBF,10);
-	printf("== %d %d ==",a++, bbb++);
+    static int a = 0; 
+    printf("== %d %d ==\n",a++, bbb++);
 }
 
-   
+
 void *run (void *arg)
 {
-	printf("Hello world of POSIX threads.%d\n", (int) (0));
-	for (int i = 0; i < 10; i++)
+    printf("Hello world of POSXI threads.%d\n", (int) (0) );
+    for (int i = 0; i < 100; i++)
 	{
-		sleep(1);
-		fn_s();
+		sleep(1); 
+		fn_s(); 
 	}
-	return 0;
-  
+    return 0;
+
 }
-   
+
 int main()
 {
 	int result1;
-    run((void *) 0);
-    printf("Thread return %d at the end\n", result1);
+	run((void *) 0); 
+	sleep(10);
+
+	run((void *) 0); 
+	printf("Thread return %d at the end\n", result1);
 }
+