diff --git a/infolabs/procmemorylearning/code.c b/infolabs/procmemorylearning/code.c
index 7fd9d34..5612071 100644
--- a/infolabs/procmemorylearning/code.c
+++ b/infolabs/procmemorylearning/code.c
@@ -61,6 +61,13 @@ int scan(void){
             printf("You enter n>100 000 Try again\nNum: ");
             continue;
         }
+        
+        if(x=='0'&&n<=0){
+            while((x = getchar())!='\n')
+                if(x == EOF) return 0;
+        printf("You num cannot starts with 0. Try again\nNum: ");
+        continue;
+        }
 
     }
     if (x == EOF) return 0;