#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,n) for (int i=0;i<(int)(n);i++)

int fr(pair<int,int> &a,pair<int,int> &b){
  return (a.first-b.first)*(a.first-b.first)+(a.second-b.second)*(a.second-b.second);
}

unsigned int randxor(){
  static unsigned int x=123456789,y=362436069,z=521288629,w=88675123;
  unsigned int t=(x^(x<<11)); x=y;y=z;z=w;
  return( w=(w^(w>>19))^(t^(t>>8)) );
}

vector<vector<ll>> d(110,vector<ll>(110,0));
vector<pair<int,int>> v(110);
ll cost_calc(vector<pair<int,int>> &ans,vector<pair<int,int>> &ccd){
  double cost=0;
  int flg=0;
  int bf=-1;
  for(auto [x,i]:ans){
    if(bf!=-1){
      if(x==1){
        if(flg){
          cost+=fr(v.at(i),ccd.at(bf))*5;
          flg=0;
        }
        else cost+=d.at(bf).at(i)*25;
      }else{
        if(flg) cost+=fr(ccd.at(i),ccd.at(bf));
        else{
          cost+=fr(ccd.at(i),v.at(bf))*5;
          flg=1;
        }
      }
    }
    bf=i;
  }
  return round(1e9/(1000+sqrt(cost)));
}

int main(){
  auto start_time = std::chrono::system_clock::now();
  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  int n,m;
  cin>>n>>m;
  vector<pair<int,int>> v(n);
  rep(i,n){
    cin>>v.at(i).first>>v.at(i).second;
  }
  rep(i,n){
    for(int j=i+1;j<n;j++){
      d.at(i).at(j)=fr(v.at(i),v.at(j));
      d.at(j).at(i)=d.at(i).at(j);
    }
  }
  vector<bool> stl(n,0);
  vector<pair<int,int>> ccd(m,{0,0});
  vector<pair<int,int>> ans;
  ans.emplace_back(1,0);
  stl.at(0)=1;
  int nw=0;
  rep(i,n-1){
    int mn=1e9;
    int mnct=-1;
    rep(j,n){
      if(stl.at(j)) continue;
      if(mn>d.at(nw).at(j)){
        mn=d.at(nw).at(j);
        mnct=j;
      }
    }
    if(mnct==-1){
      break;
    }
    stl.at(mnct)=1;
    ans.emplace_back(1,mnct);
    nw=mnct;
  }
  ans.emplace_back(1,0);
  ll nwcost=cost_calc(ans,ccd);
  const unsigned int inf=-1;
  const double start_temp=10;
  const double end_temp=0;
  const int lim_time=100;
  int sz=ans.size();
  while(1){
    int w_time=chrono::duration_cast<chrono::milliseconds>(chrono::system_clock::now()-start_time).count();
    if(w_time>lim_time){
      break;
    }
    int a=0,b=0;
    while(a==0||a==sz-1) a=randxor()%sz;
    while(b==0||b==sz-1||b==a) b=randxor()%sz;
    swap(ans.at(a),ans.at(b));
    ll nxcost=cost_calc(ans,ccd);
    double temp=start_temp+(end_temp-start_temp)*w_time/lim_time;
    double prob=exp(double(nxcost-nwcost)/temp);
    if(prob>double(randxor())/double(inf)) nwcost=nxcost;
    else swap(ans.at(a),ans.at(b));
  }
  const double start_temp2=500;
  const double end_temp2=0;
  const int lim_time2=500;
  while(1){
    int w_time=chrono::duration_cast<chrono::milliseconds>(chrono::system_clock::now()-start_time).count();
    w_time-=lim_time;
    if(w_time>lim_time2){
      break;
    }
    int a=0,b=0;
    while(a==0||a==sz-1) a=randxor()%sz;
    while(b==0||b==sz-1||b==a) b=randxor()%sz;
    vector<pair<int,int>> nans;
    if(a>b) swap(a,b);
    for(int i=0;i<a;i++) nans.emplace_back(ans.at(i));
    for(int i=b-1;i>=a;i--) nans.emplace_back(ans.at(i));
    for(int i=b;i<sz;i++) nans.emplace_back(ans.at(i));
    ll nxcost=cost_calc(nans,ccd);
    double temp=start_temp2+(end_temp2-start_temp2)*w_time/lim_time2;
    double prob=exp(double(nxcost-nwcost)/temp);
    if(prob>double(randxor())/double(inf)) {
      nwcost=nxcost;
      ans=nans;
    }
  }
  for(auto ccdd:ccd){
    cout<<ccdd.first<<" "<<ccdd.second<<"\n";
  }
  cout<<ans.size()<<"\n";
  for(auto a:ans){
    cout<<a.first<<" "<<a.second+1<<"\n";
  }
}