diff --git a/src/20241121/U504526.cpp b/src/20241121/U504526.cpp
new file mode 100644
index 0000000..d0701cf
--- /dev/null
+++ b/src/20241121/U504526.cpp
@@ -0,0 +1,125 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+typedef long long ll;
+const int MOD = 1e9 + 7;
+
+ll pd(ll base, ll exp, ll mod)
+{
+    ll res = 1;
+    base %= mod;
+    while (exp > 0)
+    {
+        if (exp & 1LL)
+        {
+            res = res * base % mod;
+        }
+        base = base * base % mod;
+        exp >>= 1LL;
+    }
+    return res;
+}
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    cin.tie(0);
+
+    int m, q;
+    cin >> m >> q;
+    vector<int> que(q);
+    for (auto &x : que)
+        cin >> x;
+
+    int max_n = 0;
+    for (auto n : que)
+        max_n = max(max_n, n);
+
+    if (m == 1)
+    {
+
+        for (auto n : que)
+        {
+            if (n == 0)
+            {
+                cout << "1\n";
+            }
+            else
+            {
+                ll ans = pd(2, n - 1, MOD);
+                cout << ans << "\n";
+            }
+        }
+        return 0;
+    }
+
+    vector<ll> dpp(m + 2, 0);
+    dpp[1] = 1;
+
+    for (int i = 0; i < max_n; ++i)
+    {
+        vector<ll> dpc(m + 2, 0);
+
+        for (int j = 1; j <= m; ++j)
+        {
+            if (dpp[j] == 0)
+                continue;
+
+            ll de = (dpp[j] * (2LL * j)) % MOD;
+            dpc[j] = (dpc[j] + de) % MOD;
+
+            if (j < m)
+            {
+
+                ll di = (dpp[j] * (j)) % MOD;
+                dpc[j + 1] = (dpc[j + 1] + di) % MOD;
+            }
+        }
+        dpp = dpc;
+    }
+
+    vector<vector<ll>> dpa(max_n + 1, vector<ll>(m + 2, 0));
+    dpa[0][1] = 1;
+
+    for (int del = 0; del < max_n; ++del)
+    {
+        for (int j = 1; j <= m; ++j)
+        {
+            if (dpa[del][j] == 0)
+                continue;
+
+            ll we = (dpa[del][j] * (2LL * j)) % MOD;
+            dpa[del + 1][j] = (dpa[del + 1][j] + we) % MOD;
+
+            if (j < m)
+            {
+                ll wi = (dpa[del][j] * j) % MOD;
+                dpa[del + 1][j + 1] = (dpa[del + 1][j + 1] + wi) % MOD;
+            }
+        }
+    }
+
+    for (auto n : que)
+    {
+        if (n == 0)
+        {
+
+            cout << "1\n";
+            continue;
+        }
+        if (n > max_n)
+        {
+
+            cout << "0\n";
+            continue;
+        }
+
+        ll ans = 0;
+        for (int j = 1; j <= m; ++j)
+        {
+            ans = (ans + dpa[n][j]) % MOD;
+        }
+
+        cout << ans << "\n";
+    }
+}
diff --git a/src/20241121/U504527.cpp b/src/20241121/U504527.cpp
new file mode 100644
index 0000000..07ceb39
--- /dev/null
+++ b/src/20241121/U504527.cpp
@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+const int MOD = 998244353;
+ll n, res, m;
+ll ca = 0;
+void dfs(int pos, ll cn) {
+    if (pos == n) {
+        if (cn % m == res) {
+            ca = (ca + 1) % MOD;
+        }
+        return;
+    }
+    for (ll a = 0; a < m; ++a) {
+        dfs(pos + 1, (cn * a) % m);
+    }
+}
+int main(){
+    cin >> n >> res >> m;
+    if (n == 0){
+        if (res == 1 % m){
+            cout << 1 << endl;
+        }
+        else{
+            cout << 0 << endl;
+        }
+        return 0;
+    }
+    dfs(0, 1); 
+    cout << ca % MOD << endl;
+    return 0;
+}
diff --git a/src/20241121/chain/1.ans b/src/20241121/chain/1.ans
new file mode 100644
index 0000000..e9d93fa
--- /dev/null
+++ b/src/20241121/chain/1.ans
@@ -0,0 +1 @@
+16
diff --git a/src/20241121/chain/1.in b/src/20241121/chain/1.in
new file mode 100644
index 0000000..8a481a5
--- /dev/null
+++ b/src/20241121/chain/1.in
@@ -0,0 +1,2 @@
+1 1
+5
\ No newline at end of file
diff --git a/src/20241121/chain/2.ans b/src/20241121/chain/2.ans
new file mode 100644
index 0000000..a5f18d3
--- /dev/null
+++ b/src/20241121/chain/2.ans
@@ -0,0 +1 @@
+678247101
diff --git a/src/20241121/chain/2.in b/src/20241121/chain/2.in
new file mode 100644
index 0000000..bb04ed9
--- /dev/null
+++ b/src/20241121/chain/2.in
@@ -0,0 +1,2 @@
+1 1
+508872207
diff --git a/src/20241121/chain/3.ans b/src/20241121/chain/3.ans
new file mode 100644
index 0000000..da12824
--- /dev/null
+++ b/src/20241121/chain/3.ans
@@ -0,0 +1 @@
+13029318
diff --git a/src/20241121/chain/3.in b/src/20241121/chain/3.in
new file mode 100644
index 0000000..5727443
--- /dev/null
+++ b/src/20241121/chain/3.in
@@ -0,0 +1,2 @@
+2 1
+4778
diff --git a/src/20241121/chain/4.ans b/src/20241121/chain/4.ans
new file mode 100644
index 0000000..befaf6c
--- /dev/null
+++ b/src/20241121/chain/4.ans
@@ -0,0 +1,500 @@
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diff --git a/src/20241121/chain/4.in b/src/20241121/chain/4.in
new file mode 100644
index 0000000..a7b2379
--- /dev/null
+++ b/src/20241121/chain/4.in
@@ -0,0 +1,501 @@
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