diff --git a/src/9/P3608.cpp b/src/9/1/P3608.cpp
similarity index 99%
rename from src/9/P3608.cpp
rename to src/9/1/P3608.cpp
index 76520b3..5e1e176 100644
--- a/src/9/P3608.cpp
+++ b/src/9/1/P3608.cpp
@@ -12,6 +12,8 @@ std::vector<ll> a,raw;
 std::map<ll, ll> m;
 std::vector<ll> t;
 
+
+
 static inline constexpr ll lb(ll n){
     return n&(-n);
 }
diff --git a/src/9/1/P6278.cpp b/src/9/1/P6278.cpp
new file mode 100644
index 0000000..1e25d04
--- /dev/null
+++ b/src/9/1/P6278.cpp
@@ -0,0 +1,52 @@
+#include <cstdint>
+#include <iostream>
+#include <istream>
+#include <vector>
+
+using ll = int64_t;
+
+ll n,ans=0;
+std::vector<ll> a,t,s;
+
+static inline ll lb(ll val){
+    return n&-n;
+}
+
+static inline void upd(ll idx,ll add){
+    while (idx<=n) {
+        t[idx]+=n;
+        idx+=lb(idx);
+    }
+}
+
+static inline ll get(ll idx){
+    ll res=0;
+    while(idx){
+        res+=t[idx];
+        idx-=lb(idx);
+    }
+    return res;
+}
+
+int main(){
+    std::iostream::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    std::cin>>n;
+    a.resize(n+2);
+    s.resize(n+2);
+    t.resize(n+2);
+    for(ll i=1;i<=n;++i){
+        std::cin>>a[i];
+        ++a[i];
+    }
+    for(ll i=1;i<=n;++i){
+        s[i]=get(a[i]);
+        upd(a[i],1);
+    }
+    std::cout<<"0\n";
+    for(ll i=1;i<=n;i++){
+        ans+=s[i];
+        std::cout<<ans<<"\n";
+    }
+}
\ No newline at end of file
diff --git a/src/test.cpp b/src/test.cpp
index 6f8d19d..018647b 100644
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -1,8 +1,19 @@
+#include <cmath>
 #include <iostream>
-using namespace std;
-
+#include <set>
+#include <stdexcept>
+#include <string>
 int main(){
-    int a = 1;
-    a<<=32;
-    cout<<a<<"\n";
+    int n;
+    std::cin>>n;
+    std::set<int> s;
+    std::cout<<n<<"\n";
+    for(int i=1;i<=n;i++){
+        int tmp;
+        std::cin>>tmp;
+        if(s.find(tmp)==s.end()){
+            throw std::runtime_error(std::to_string(tmp));
+        }
+        s.insert(tmp);
+    }
 }
\ No newline at end of file