//#define _GLIBCXX_DEBUG

//#pragma GCC target("avx2")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")

#include<bits/stdc++.h>
using namespace std;


#ifdef LOCAL
#include <debug_print.hpp>
#define OUT(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#define OUT(...) (static_cast<void>(0))
#endif

#define endl '\n'
#define lfs cout<<fixed<<setprecision(15)
#define ALL(a)  (a).begin(),(a).end()
#define ALLR(a)  (a).rbegin(),(a).rend()
#define UNIQUE(a) (a).erase(unique((a).begin(),(a).end()),(a).end())
#define spa << " " <<
#define fi first
#define se second
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define EB emplace_back
#define rep(i,n,m) for(ll i = (n); i < (ll)(m); i++)
#define rrep(i,n,m) for(ll i = (ll)(m) - 1; i >= (ll)(n); i--)

namespace template_tute{
  using ll = long long;
  using ld = long double;
  const ll MOD1 = 1e9+7;
  const ll MOD9 = 998244353;
  const ll INF = 4.1e18;
  using P = pair<ll, ll>;
  template<typename T> using PQ = priority_queue<T>;
  template<typename T> using QP = priority_queue<T,vector<T>,greater<T>>;
  template<typename T1, typename T2>bool chmin(T1 &a,T2 b){if(a>b){a=b;return true;}else return false;}
  template<typename T1, typename T2>bool chmax(T1 &a,T2 b){if(a<b){a=b;return true;}else return false;}
  ll median(ll a,ll b, ll c){return a+b+c-max<ll>({a,b,c})-min<ll>({a,b,c});}
  void ans1(bool x){if(x) cout<<"Yes"<<endl;else cout<<"No"<<endl;}
  void ans2(bool x){if(x) cout<<"YES"<<endl;else cout<<"NO"<<endl;}
  void ans3(bool x){if(x) cout<<"Yay!"<<endl;else cout<<":("<<endl;}
  template<typename T1,typename T2>void ans(bool x,T1 y,T2 z){if(x)cout<<y<<endl;else cout<<z<<endl;}  
  template<typename T1,typename T2,typename T3>void anss(T1 x,T2 y,T3 z){ans(x!=y,x,z);};  
  template<typename T>void debug(const T &v,ll h,ll w,string sv=" "){for(ll i=0;i<h;i++){cout<<v[i][0];for(ll j=1;j<w;j++)cout<<sv<<v[i][j];cout<<endl;}};
  template<typename T>void debug(const T &v,ll n,string sv=" "){if(n!=0)cout<<v[0];for(ll i=1;i<n;i++)cout<<sv<<v[i];cout<<endl;};
  template<typename T>void debug(const vector<T>&v){debug(v,v.size());}
  template<typename T>void debug(const vector<vector<T>>&v){for(auto &vv:v)debug(vv,vv.size());}
  template<typename T>void debug(stack<T> st){while(!st.empty()){cout<<st.top()<<" ";st.pop();}cout<<endl;}
  template<typename T>void debug(queue<T> st){while(!st.empty()){cout<<st.front()<<" ";st.pop();}cout<<endl;}
  template<typename T>void debug(deque<T> st){while(!st.empty()){cout<<st.front()<<" ";st.pop_front();}cout<<endl;}
  template<typename T>void debug(PQ<T> st){while(!st.empty()){cout<<st.top()<<" ";st.pop();}cout<<endl;}
  template<typename T>void debug(QP<T> st){while(!st.empty()){cout<<st.top()<<" ";st.pop();}cout<<endl;}
  template<typename T>void debug(const set<T>&v){for(auto z:v)cout<<z<<" ";cout<<endl;}
  template<typename T>void debug(const multiset<T>&v){for(auto z:v)cout<<z<<" ";cout<<endl;}
  template<typename T,size_t size>void debug(const array<T, size> &a){for(auto z:a)cout<<z<<" ";cout<<endl;}
  template<typename T,typename V>void debug(const map<T,V>&v){for(auto z:v)cout<<"["<<z.first<<"]="<<z.second<<",";cout<<endl;}
  template<typename T>vector<vector<T>>vec(ll x, ll y, T w){vector<vector<T>>v(x,vector<T>(y,w));return v;}
  vector<ll>dx={1,-1,0,0,1,1,-1,-1};vector<ll>dy={0,0,1,-1,1,-1,1,-1};
  template<typename T>vector<T> make_v(size_t a,T b){return vector<T>(a,b);}
  template<typename... Ts>auto make_v(size_t a,Ts... ts){return vector<decltype(make_v(ts...))>(a,make_v(ts...));}
  template<typename T1, typename T2>ostream &operator<<(ostream &os, const pair<T1, T2>&p){return os << "(" << p.first << "," << p.second << ")";}
  template<typename T>ostream &operator<<(ostream &os, const vector<T> &v){os<<"[";for(auto &z:v)os << z << ",";os<<"]"; return os;}
  template<typename T>void rearrange(vector<int>&ord, vector<T>&v){
    auto tmp = v;
    for(int i=0;i<tmp.size();i++)v[i] = tmp[ord[i]];
  }
  template<typename Head, typename... Tail>void rearrange(vector<int>&ord,Head&& head, Tail&&... tail){
    rearrange(ord, head);
    rearrange(ord, tail...);
  }
  template<typename T> vector<int> ascend(const vector<T>&v){
    vector<int>ord(v.size());iota(ord.begin(),ord.end(),0);
    sort(ord.begin(),ord.end(),[&](int i,int j){return make_pair(v[i],i)<make_pair(v[j],j);});
    return ord;
  }
  template<typename T> vector<int> descend(const vector<T>&v){
    vector<int>ord(v.size());iota(ord.begin(),ord.end(),0);
    sort(ord.begin(),ord.end(),[&](int i,int j){return make_pair(v[i],-i)>make_pair(v[j],-j);});
    return ord;
  }
  template<typename T> vector<T> inv_perm(const vector<T>&ord){
    vector<T>inv(ord.size());
    for(int i=0;i<ord.size();i++)inv[ord[i]] = i;
    return inv;
  }
  ll FLOOR(ll n,ll div){assert(div>0);return n>=0?n/div:(n-div+1)/div;}
  ll CEIL(ll n,ll div){assert(div>0);return n>=0?(n+div-1)/div:n/div;}
  ll digitsum(ll n){ll ret=0;while(n){ret+=n%10;n/=10;}return ret;}
  ll modulo(ll n,ll d){return (n%d+d)%d;};
  template<typename T>T min(const vector<T>&v){return *min_element(v.begin(),v.end());}
  template<typename T>T max(const vector<T>&v){return *max_element(v.begin(),v.end());}
  template<typename T>T acc(const vector<T>&v){return accumulate(v.begin(),v.end(),T(0));};
  template<typename T>T reverse(const T &v){return T(v.rbegin(),v.rend());};
  //mt19937 mt(chrono::steady_clock::now().time_since_epoch().count());
  int popcount(ll x){return __builtin_popcountll(x);};
  int poplow(ll x){return __builtin_ctzll(x);};
  int pophigh(ll x){return 63 - __builtin_clzll(x);};
  template<typename T>T poll(queue<T> &q){auto ret=q.front();q.pop();return ret;};
  template<typename T>T poll(priority_queue<T> &q){auto ret=q.top();q.pop();return ret;};
  template<typename T>T poll(QP<T> &q){auto ret=q.top();q.pop();return ret;};
  template<typename T>T poll(stack<T> &s){auto ret=s.top();s.pop();return ret;};
  ll MULT(ll x,ll y){if(LLONG_MAX/x<=y)return LLONG_MAX;return x*y;}
  ll POW2(ll x, ll k){ll ret=1,mul=x;while(k){if(mul==LLONG_MAX)return LLONG_MAX;if(k&1)ret=MULT(ret,mul);mul=MULT(mul,mul);k>>=1;}return ret;}
  ll POW(ll x, ll k){ll ret=1;for(int i=0;i<k;i++){if(LLONG_MAX/x<=ret)return LLONG_MAX;ret*=x;}return ret;}
  std::ostream &operator<<(std::ostream &dest, __int128_t value) {
    std::ostream::sentry s(dest);
    if (s) {
      __uint128_t tmp = value < 0 ? -value : value;
      char buffer[128];
      char *d = std::end(buffer);
      do {
        --d;
        *d = "0123456789"[tmp % 10];
        tmp /= 10;
      } while (tmp != 0);
      if (value < 0) {
        --d;
        *d = '-';
      }
      int len = std::end(buffer) - d;
      if (dest.rdbuf()->sputn(d, len) != len) {
        dest.setstate(std::ios_base::badbit);
      }
    }
    return dest;
  }
  namespace converter{
    int dict[500];
    const string lower="abcdefghijklmnopqrstuvwxyz";
    const string upper="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    const string digit="0123456789";
    const string digit1="123456789";
    void regi_str(const string &t){
      for(int i=0;i<t.size();i++){
        dict[t[i]]=i;
      }
    }
    void regi_int(const string &t){
      for(int i=0;i<t.size();i++){
        dict[i]=t[i];
      }
    }
    vector<int>to_int(const string &s,const string &t){
      regi_str(t);
      vector<int>ret(s.size());
      for(int i=0;i<s.size();i++){
        ret[i]=dict[s[i]];
      }
      return ret;
    }
    vector<int>to_int(const string &s){
      auto t=s;
      sort(t.begin(),t.end());
      t.erase(unique(t.begin(),t.end()),t.end());
      return to_int(s,t);
    }
    
    vector<vector<int>>to_int(const vector<string>&s,const string &t){
      regi_str(t);
      vector<vector<int>>ret(s.size(),vector<int>(s[0].size()));
      for(int i=0;i<s.size();i++){
        for(int j=0;j<s[0].size();j++){
          ret[i][j]=dict[s[i][j]];
        }
      }
      return ret;
    }
    vector<vector<int>>to_int(const vector<string>&s){
      string t;
      for(int i=0;i<s.size();i++){
        t+=s[i];
      }
      sort(t.begin(),t.end());t.erase(unique(t.begin(),t.end()),t.end());
      return to_int(s,t);
    }
    string to_str(const vector<int>&s,const string &t){
      regi_int(t);
      string ret;
      for(auto z:s)ret+=dict[z];
      return ret;
    }
    vector<string> to_str(const vector<vector<int>>&s,const string &t){
      regi_int(t);
      vector<string>ret(s.size());
      for(int i=0;i<s.size();i++){
        for(auto z:s[i])ret[i]+=dict[z];
      }
      return ret;
    }
  }
  template< typename T = int >
  struct edge {
    int to;
    T cost;
    int id;
    edge():to(-1),id(-1){};
    edge(int to, T cost = 1, int id = -1):to(to), cost(cost), id(id){}
    operator int() const { return to; }
  };

  template<typename T>
  using Graph = vector<vector<edge<T>>>;
  template<typename T>
  Graph<T>revgraph(const Graph<T> &g){
    Graph<T>ret(g.size());
    for(int i=0;i<g.size();i++){
      for(auto e:g[i]){
        int to = e.to;
        e.to = i;
        ret[to].push_back(e);
      }
    }
    return ret;
  }
  template<typename T>
  Graph<T> readGraph(int n,int m,int indexed=1,bool directed=false,bool weighted=false){
    Graph<T> ret(n);
    for(int es = 0; es < m; es++){
      int u,v;
      T w=1;
      cin>>u>>v;u-=indexed,v-=indexed;
      if(weighted)cin>>w;
      ret[u].emplace_back(v,w,es);
      if(!directed)ret[v].emplace_back(u,w,es);
    }
    return ret;
  }
  template<typename T>
  Graph<T> readParent(int n,int indexed=1,bool directed=true){
    Graph<T>ret(n);
    for(int i=1;i<n;i++){
      int p;cin>>p;
      p-=indexed;
      ret[p].emplace_back(i);
      if(!directed)ret[i].emplace_back(p);
    }
    return ret;
  }
}
using namespace template_tute;

template<typename T>
struct Namori{
  const Graph<T>&g;
  int n;
  int edge_num=0;
  bool directed_forest = false;
  Namori(const Graph<T>&g, bool directed):g(g),n(g.size()){
    directed_forest = directed;
    int edge_num=0;
    for(auto &v:g)edge_num+=v.size();
    build();
  }
  vector<vector<int>>cycle;//連結成分の根となるサイクル サイクルではない場合も
  vector<vector<edge<T>>>cycle_edge;//辺属性
  vector<int>vn,en;//連結成分の頂点数、辺数
  Graph<T>forest;
  vector<int>root;
  vector<int>cycle_number;//頂点が属するサイクル番号 サイクルに属さなければ-1
  void build(){
    dfs_used.assign(n,false);
    dfs_now.assign(n,false);
    dfs_ver.clear();
    dfs_edge.clear();
    root.assign(n,-1);
    for(int i=0;i<n;i++){
      if(dfs_used[i])continue;
      cycle.emplace_back();
      cycle_edge.emplace_back();
      vn.push_back(0);
      en.push_back(0);
      build_dfs(i,-1,cycle.back(),cycle_edge.back());
      if(cycle.back().empty()){
        cycle.back().push_back(i);
      }
    }
    forest.resize(n);
    cycle_number.assign(n,-1);
    for(int i=0;i<cycle.size();i++){
      for(auto v:cycle[i])cycle_number[v]=i;
    }
    dfs_used.assign(n,false);
    for(int i=0;i<n;i++){
      if(cycle_number[i]!=-1)tree_dfs(i,vn[cycle_number[i]],en[cycle_number[i]],i);
    }
    for(int i=0;i<cycle.size();i++)en[i]>>=1;
  }
  void tree_dfs(int pos,int &vn,int &en,int r){
    vn++;
    dfs_used[pos]=true;
    root[pos]=r;
    for(auto e:g[pos]){
      en++;
      if(pos!=r&&dfs_used[e.to]&&!directed_forest)forest[pos].push_back(e);
      if(dfs_used[e.to]||cycle_number[e.to]!=-1)continue;
      forest[pos].push_back(e);
      tree_dfs(e.to,vn,en,r);
    }
  }
  vector<bool>dfs_used;
  vector<int>dfs_ver;
  vector<edge<T>>dfs_edge;
  vector<bool>dfs_now;
  void build_dfs(int pos, int par,vector<int>&cycle,vector<edge<T>>&cycle_edge){
    dfs_used[pos]=true;
    dfs_now[pos]=true;
    dfs_ver.push_back(pos);
    bool multiple_par=false;
    for(auto e:g[pos]){
      if(dfs_now[e.to]&&cycle.empty()&&(e.to!=par||multiple_par)){
        dfs_edge.EB(e);
        rep(i,0,dfs_ver.size()){
          if(!cycle.empty()||dfs_ver[i]==e.to)cycle.push_back(dfs_ver[i]);
          if(!cycle.empty()){
            cycle_edge.push_back(dfs_edge[i]);
          }
        }
        dfs_edge.pop_back();
      }
      if(e.to==par)multiple_par=true;
      if(dfs_used[e.to])continue;
      dfs_edge.push_back(e);
      build_dfs(e.to,pos,cycle,cycle_edge);
      dfs_edge.pop_back();
    }
    dfs_now[pos]=false;
    dfs_ver.pop_back();
  }
};

template<typename T,typename Compare>
struct EraceablePriorityQueue{
  priority_queue<T,vector<T>,Compare>pq, epq;
  void push(T x){pq.push(x);}
  void _erase_top(){
    while(!epq.empty()&&pq.top()==epq.top()){
      pq.pop();
      epq.pop();
    }
  }
  T pop(){
    _erase_top();
    T ret=pq.top();
    pq.pop();
    return ret;
  }
  T top(){
    _erase_top();
    return pq.top();
  }
  void erase(T x){epq.push(x);}
  bool empty(){return pq.size()==epq.size();}
  int size(){return pq.size()-epq.size();}
};
template<typename T>
using MinEraseablePriorityQueue=EraceablePriorityQueue<T,greater<T>>;
template<typename T>
using MaxEraseablePriorityQueue=EraceablePriorityQueue<T,less<T>>;




void solve(){
	ll res=0,buf=0;
  bool judge = true;

  ll n,k;cin>>n>>k;
  vector<int>t(n);
  rep(i,0,n)cin>>t[i];
  Graph<int>g(n);
  vector<int>a(n);
  rep(i,0,n){
    cin>>a[i];
    a[i]--;
    g[i].EB(a[i]);
    g[a[i]].EB(i);
  }
  Namori<int>namori(g,true);
  ll ret=0;
  MaxEraseablePriorityQueue<pair<int,int>>pq;
  ll loopsz=0,arrsz=0;
  vector<vector<int>>loop(n+1);
  vector<vector<int>>arr(n+1);
  auto calc=[&](int x)->ll {
    if(arr[x].size()>=k){
      return arr[x][arr[x].size()-k];
    }
    ll rem=k-arr[x].size()-1;
    if(loop[x].empty())return -INF;
    ll ret=-((ll)rem/(loop[x].size())*loopsz);
    ret+=loop[x][loop[x].size()-1-rem%loop[x].size()];
    return ret;
  };
  auto loop_init=[&](vector<int>v){
    for(auto x:v){
      loop[x].PB(loopsz);
      loopsz++;
    }
    while(!pq.pq.empty())pq.pq.pop();
    while(!pq.epq.empty())pq.epq.pop();
  };
  auto loop_end=[&](vector<int>v){
    loopsz=0;
    for(auto x:v){
      loop[x].pop_back();
    }
    while(!pq.empty()){
      pq.pop();
    }
  };
  auto del=[&](int x){
    auto val=calc(x);
    if(val!=INF)pq.erase(MP(calc(x),x));
  };
  auto ins=[&](int x){
    auto val=calc(x);
    if(val!=INF)pq.push(MP(calc(x),x));
  };
  auto push=[&](int x){
    del(x);
    arr[x].PB(loopsz+arrsz);
    arrsz++;
    ins(x);
  };
  auto pop=[&](int x){
    del(x);
    arr[x].pop_back();
    arrsz--;
    ins(x);
  };
  for(auto cy:namori.cycle){
    if(a[cy[0]]==cy[1%cy.size()]){
      reverse(ALL(cy));
    }
    vector<int>ts;
    for(auto x:cy){
      ts.PB(t[x]);
    }
    loop_init(ts);
    for(auto c:cy){
      auto dfs=[&](auto &&f,int v)->void {
        push(t[v]);
        ret+=ll(v+1)*(pq.top().se);
        for(auto to:namori.forest[v]){
          f(f,to.to);
        }
        pop(t[v]);
      };
      dfs(dfs,c);
      push(t[c]);
    }
    loop_end(ts);
  }
  cout<<ret<<endl;
}

int main(){
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  ll res=0,buf=0;
  bool judge = true;
  int T = 1;
  cin>>T;
  while(T--){
    solve();
  }
  return 0;
}