diff --git a/day12/20240814sol.pdf b/day12/20240814sol.pdf
new file mode 100644
index 0000000..0c9ef06
Binary files /dev/null and b/day12/20240814sol.pdf differ
diff --git a/day12/U466180/U466180.cpp b/day12/U466180/U466180.cpp
index d650c15..0e32cf9 100644
--- a/day12/U466180/U466180.cpp
+++ b/day12/U466180/U466180.cpp
@@ -4,9 +4,10 @@
 using namespace std;
 #define int long long
 
-const int MAX_N = 2e8+5;
+const int MAX_N = 1000+5;
 int a[MAX_N];
 int n,amax=INT_MIN,ans=0;
+unordered_map<int,long long> um;
 int readint();
 
 signed main(signed argc,char *argv[]){
@@ -22,16 +23,22 @@ signed main(signed argc,char *argv[]){
     #endif
     n=readint();
     for(int i=1;i<=n;i++){
-        int input=readint();
-        a[input]++;
-        amax=max(amax,input);
+        a[i]=readint();
     }
-    for(int i=2;i<=amax;i++){
-        int nans = 0;
-        for(int j=1;(i*j)<=amax;j++){
-            nans+=a[i*j]*i*j;
+    for(int i=1;i<=n;i++){
+        int num=a[i];
+        for(int j=2;j<=sqrt(a[i]);j++){
+            if(num%j==0){
+                um[j]+=a[i];
+                while(num%j==0)num/=j;
+            }
         }
-        ans=max(ans,nans);
+        if(num>1){
+            um[num]+=a[i];
+        }
+    }
+    for(auto i : um){
+        ans+=i.second;
     }
     cout<<ans<<endl;
     #ifdef OITEST