diff --git a/src/20241121/U504523.cpp b/src/20241121/U504523.cpp
index f610952..024b5d3 100644
--- a/src/20241121/U504523.cpp
+++ b/src/20241121/U504523.cpp
@@ -1,4 +1,5 @@
 #include <bits/stdc++.h>
+#include <execution>
 using namespace std;
 
 using ll =int64_t;
@@ -15,8 +16,8 @@ int main(){
     for(int i=0;i<n;i++){
         cin >> a[i] >> d[i];
     }
-    sort(a, a+n);
-    sort(d, d+n);
+    sort(execution::par, a, a+n);
+    sort(execution::par, d, d+n);
     int j = 0;
     int k = 0;
     for(int i=0;i<n;i++){
diff --git a/src/20241121/U504526s2.cpp b/src/20241121/U504526s2.cpp
new file mode 100644
index 0000000..45629d0
--- /dev/null
+++ b/src/20241121/U504526s2.cpp
@@ -0,0 +1,31 @@
+#include <bits/stdc++.h>
+
+using ll = int64_t;
+using namespace std;
+
+const ll mod{ll(1e9+7)};
+ll m,q,n;
+
+ll fpow(ll b,ll e){
+    b%=mod;
+    ll res{1};
+    while(e!=0){
+        if(e&1){
+            res=res*b%mod;
+        }
+        b=b*b%mod;
+        e>>=1;
+    }
+    return res;
+}
+
+int main(){
+    iostream::sync_with_stdio(0),cin.tie(0),cout.tie(0);
+
+    cin>>m>>q;
+    for(ll i{1};i<=q;i++){
+        cin>>n;
+        cout<<fpow(2,n-1)<<'\n';
+    }
+
+}
\ No newline at end of file
diff --git a/src/test.cpp b/src/test.cpp
index 991d9fe..a44d88b 100755
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -1,53 +1,6 @@
-#include <algorithm>
-#include <array>
-#include <cstddef>
-#include <cstdint>
 #include <iostream>
-#include <ranges>
-#include <type_traits>
-#include <utility>
 
-using int64 = int64_t;
-
-template<class ...Args>
-void input(Args&&...args){
-    (std::cin>>...>>std::forward<Args>(args));
-}
-
-template <class T>
-std::remove_cvref_t<T> input(){
-    std::remove_cvref_t<T> t;
-    std::cin>>t;
-    return t;
-}
-
-template<class ...Args>
-void print(Args&&...args){
-    (std::cout<<...<<std::forward<Args>(args));
-}
-
-constexpr std::array<int64, (size_t)1e4+5> l2 = []()constexpr->std::remove_cvref_t<decltype(l2)>{
-    std::remove_cvref_t<decltype(l2)> ret{};
-    ret[1] = 0;
-    for (const auto &i : std::ranges::views::iota((size_t)2, ret.size())) {
-        ret[i] = ret[i/2] + 1;
-    }
-    return ret;
-}();
-
-int64 lowbit(const int64 &num){
-    return num&(-num);
-}
 
 int main(){
-    constexpr std::array arr{
-        1,2,3, 4, 5
-    };
-    std::ranges::for_each(std::ranges::views::iota((int64)1, 1ll<<arr.size()), [&arr](auto i){
-        while(i!=0){
-            print(arr[l2[lowbit(i)]], ' ');
-            i-=lowbit(i);
-        }
-        print('\n');
-    });
+    
 }
\ No newline at end of file