diff --git a/GW1-2/lambda-packexpansion.cc b/GW1-2/lambda-packexpansion.cc
index d668a5d..7499b40 100644
--- a/GW1-2/lambda-packexpansion.cc
+++ b/GW1-2/lambda-packexpansion.cc
@@ -1,5 +1,6 @@
 #include <iostream>
 #include <tuple>
+#include <experimental/tuple>
 
 template<class... Args1>
 auto f(Args1... args){
@@ -17,12 +18,12 @@ template<class... Args3>
 //by move
   auto q2(Args3... args){
     return [tup=std::make_tuple(std::move(args)...)]()->decltype(auto){
-       return std::apply([](auto const&... args)->decltype(auto){
+       return std::experimental::apply([](auto const&... args)->decltype(auto){
         return f(args...);
      } , tup);
   };
 }
-template<class... Args4>
+/*template<class... Args4>
 //pack expansion
   auto q3(Args4... args){
      return [...args=std::move(args)]()->decltype(auto) {
@@ -30,7 +31,7 @@ template<class... Args4>
      return f(args...);
 
   };
- }
+ }*/
 int main()
 {
   
@@ -39,6 +40,6 @@ int main()
   
   q2(1,1);
   
-  q3(1,1);
+  //q3(1,1);
   
 }