diff --git a/src/8/15/P8817.cpp b/src/8/15/P8817.cpp
new file mode 100644
index 0000000..da85b69
--- /dev/null
+++ b/src/8/15/P8817.cpp
@@ -0,0 +1,59 @@
+#include <cstdint>
+#include <functional>
+#include <iostream>
+#include <queue>
+#include <utility>
+#include <vector>
+
+using ll = int64_t;
+ll n,m,k;
+std::vector<ll> score;
+std::vector<std::vector<ll>> edg;
+std::vector<std::vector<bool>> cango;
+std::vector<std::vector<ll>> best3;
+
+void dfscango(ll from,ll cur, ll curk){
+    if(curk>k){
+        return;
+    }
+    for(ll i=0;i<edg[cur].size();i++){
+        cango[from][edg[cur][i]]=true;
+        dfscango(from, edg[cur][i], curk+1);
+    }
+    return;
+}
+
+int main(){
+    std::cin>>n>>m>>k;
+    score.resize(n+1);
+    edg.resize(n+1);
+    cango.resize(n+1,std::vector<bool>(n+1));
+    best3.resize(n+1);
+    for(ll i=2;i<=n;i++){
+        std::cin>>score[i];
+    }
+    for(ll i=1;i<=m;i++){
+        ll u,v;
+        std::cin>>u>>v;
+        edg[u].push_back(v);
+        edg[v].push_back(u);
+    }
+    for(ll i=1;i<=n;i++){
+        dfscango(i, i, 0);
+    }
+    for(ll i=2;i<=n;i++){
+        std::priority_queue<std::pair<ll, ll>,std::vector<std::pair<ll, ll>>,std::greater<>> pr;
+        for(ll j=2;j<=n;j++){
+            if(i==j)continue;
+            if(cango[i][j]&&cango[j][1]){
+                pr.emplace(score[j],j);
+            }
+        }
+        //TODO
+    }
+    for(ll B=2;B<=n;B++){
+        for(ll C=B+1;C<=n;C++){
+
+        }
+    }
+}
\ No newline at end of file