diff --git a/src/10/27/P9753.cpp b/src/10/27/P9753.cpp
new file mode 100644
index 0000000..85b1b28
--- /dev/null
+++ b/src/10/27/P9753.cpp
@@ -0,0 +1,40 @@
+#include <cstdint>
+#include <cstdio>
+#include <iostream>
+#include <istream>
+#include <stack>
+#include <string>
+using ll = int64_t;
+
+ll n,ans;
+std::string s;
+const ll maxn = 2e6+5;
+ll dp[maxn],end[maxn];
+
+int main(){
+    std::iostream::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin>>n;
+    std::cin>>s;
+    s='\0'+s;
+    struct S{
+        ll num,pos,ans;
+    };
+    std::stack<S> stk;
+    for(ll i=1;i<=n;i++){
+        if(stk.size() && stk.top().num==s[i]){
+            if(stk.size()==1){
+                end[i]+=end[stk.top().pos-1]*(ans-stk.top().ans);
+                ans+=end[i];
+            }
+            ans+=1;
+            end[i]=ans;
+            stk.pop();
+        }else{
+            stk.emplace(s[i],i,ans);
+        }
+        printf("i=%lld, ans=%lld, end=%lld\n",i,ans,end[i]);
+    }
+    std::cout<<ans<<"\n";
+}
\ No newline at end of file
diff --git a/src/10/28/P11233.cpp b/src/10/28/P11233.cpp
new file mode 100644
index 0000000..ac8a513
--- /dev/null
+++ b/src/10/28/P11233.cpp
@@ -0,0 +1,53 @@
+/*
+
+i=a[j]前面最近相同数字的下标
+dp[j][0]=dp[i+1][0]+same_color[j]-same_color[i]+a[j]
+    , dp[j-1][0]
+
+*/
+#include <algorithm>
+#include <cstdint>
+#include <cstdio>
+#include <iostream>
+#include <istream>
+using ll = int64_t;
+
+const ll maxn=2e6+5;
+ll n,a[maxn],sc[maxn],si[maxn],dp[maxn];
+
+#define printf
+
+static inline void solve(){
+    std::cin>>n;
+    for(ll i=0;i<maxn;i++){
+        si[i]=0;
+        dp[i]=0;
+    }
+    for(ll i=1;i<=n;i++){
+        std::cin>>a[i];
+        sc[i]=sc[i-1]+(a[i]==a[i-1]?a[i]:0);
+        printf("sc[%lld]=%lld\n",i,sc[i]);
+    }
+    for(ll j=1;j<=n;j++){
+        const ll i=si[a[j]];
+        dp[j]=dp[j-1];
+        if(i>0){
+            dp[j]=std::max(
+                dp[i+1]+(sc[j]-sc[i+1])/* 为什么这里不能是sc[j-1]-sc[i+1] */+a[j],
+                dp[j]
+            );
+        }
+        printf("i=%lld, dp[%lld]=%lld\n",i,j,dp[j]);
+        si[a[j]]=j;
+    }
+    std::cout<<dp[n]<<"\n";
+}
+
+int main(){
+    std::iostream::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    ll T;
+    std::cin>>T;
+    while(T--)solve();
+}
\ No newline at end of file
diff --git a/src/7/28/P11233.cpp b/src/7/28/P11233.cpp
deleted file mode 100644
index 294989d..0000000
--- a/src/7/28/P11233.cpp
+++ /dev/null
@@ -1,3 +0,0 @@
-int main(){
-    
-}
\ No newline at end of file