#include "bits/stdc++.h"

#define MOD 1000000007
#define rep(i, n) for(ll i=0; i < (n); i++)
#define rrep(i, n) for(ll i=(n)-1; i >=0; i--)
#define ALL(v) v.begin(),v.end()
#define rALL(v) v.rbegin(),v.rend()
#define FOR(i, j, k) for(ll i=j;i<k;i++)
#define debug_print(var) cerr << #var << "=" << var <<endl;
#define DUMP(i, v)for(ll i=0;i<v.size();i++)cerr<<v[i]<<" "
#define fi first
#define se second

using namespace std;
typedef long long int ll;
typedef vector<ll> llvec;
typedef vector<double> dvec;
typedef pair<ll, ll> P;
typedef long double ld;
struct edge{ll x, c;};

ll mod(ll a, ll mod){
  ll res = a%mod;
  if(res<0)res=res + mod;
  return res;
}

ll modpow(ll a, ll n, ll mod){
  ll res=1;
  while(n>0){
    if(n&1) res=res*a%mod;
    a=a*a%mod;
    n>>=1;
  }
  return res;
}

ll modinv(ll a, ll mod){
  ll b=mod, u=1, v=0;
  while(b){
    ll t=a/b;
    a-=t*b; swap(a, b);
    u-=t*v; swap(u, v);
  }
  u%=mod;
  if(u<0)u+=mod;
  return u;
}

ll gcd(ll a, ll b){
  ll r = a%b;
  if(r==0) return b;
  else return gcd(b, a%b);
}

bool is_prime(ll n){
  ll i = 2;
  if(n==1)return false;
  if(n==2)return true;
  bool res = true;
  while(i*i <n){
    if(n%i==0){
      res = false;
    }
    i = i+1;
  }

  //if(i==1)res = false;
  if(n%i==0)res=false;
  return res;
}

struct UnionFind{
  ll N;
  llvec p;
  llvec cnt;
  UnionFind(ll n){
    N = n;
    p=llvec(N);
    cnt=llvec(N, 0);
    rep(i, N){
      p[i] = i;
      cnt[i] = 1;
    }
  }

  void con(ll a, ll b){
    P at = root(a);
    P bt = root(b);
    if(at.second!=bt.second){
      if(at.first>bt.first){
        swap(at, bt);
        swap(a, b);
      }
      p[at.second] = bt.second;
      cnt[bt.second]+=cnt[at.second];
      p[a]=bt.second;
    }
  }

  P root(ll a){
    ll atmp = a;
    ll c=0;
    while(atmp!=p[atmp]){
      atmp = p[atmp];
      c++;
    }
    p[a] = atmp;
    return {c, atmp};
  }

  bool is_con(ll a, ll b){
    P at=root(a);
    P bt=root(b);
    return at.second == bt.second;
  }
  
};

struct dijkstra{
  ll N;
  llvec d;
  vector<vector<edge>> e;
  dijkstra(ll n){
    N = n;
    //d = llvec(N, 1e18);
    e = vector<vector<edge>>(N);
  }

  void add_edge(ll from, ll to, ll cost){
    e[from].push_back({to, cost});
  }

  void run(ll start){
    priority_queue<P, vector<P>, greater<P>> que;
    que.push({0, start});
    d = llvec(N, 1e18);
    d[start]=0;
    while(!que.empty()){
      P q = que.top();que.pop();
      ll dc = q.first;
      ll x = q.second;
      if(dc>d[x]){
        continue;
      }else{
        for(auto ip: e[x]){
          if(d[ip.x]<=d[x]+ip.c){
            continue;
          }else{
            d[ip.x]= d[x]+ip.c;
            que.push({d[ip.x], ip.x});
          }
        }
      }
    }
  }  
};


/**************************************
** A main function starts from here  **
***************************************/
int main(){
  ll a, b;
  cin >> a >> b;
  ll k;
  cin >> k;
  for(ll i=0;i<k;i++){
    if(a%2==1)a-=1;
    b += a/2;
    a/=2;
    i++;
    if(i==k)break;
    if(b%2==1)b-=1;
    a += b/2;
    b/=2;
  }
  cout << a << " " << b << endl;
  return 0;
}

#include <bits/stdc++.h>

#define rng(i, a, b) for (int i = int(a); i < int(b); i++)
#define rep(i, b) rng(i, 0, b)
#define gnr(i, a, b) for (int i = int(b) - 1; i >= int(a); i--)
#define per(i, b) gnr(i, 0, b)

using namespace std;

using ll = long long;
using P = pair<int, int>;

int main() {
  int n, k;
  cin >> n >> k;
  vector<int> x(n);
  rep(i, n) cin >> x.at(i);
  vector<int> minus;
  vector<int> plus;
  rep(i, n) {
    int xx = x.at(i);
    if (xx >= 0) {
      plus.push_back(xx);
    } else {
      minus.push_back(-xx);
    }
  }
  reverse(minus.begin(), minus.end());
  ll res = 1L << 30;
  // マイナスから折り返す
  rep(i, min((int) minus.size(), k)) {
    ll tmp = 0;
    tmp += 2 * minus.at(i);
    int plusCnt = k - 1 - i;
    if (plusCnt > (int) plus.size()) {
      continue;
    }
    if (plusCnt > 0) {
      tmp += plus.at(plusCnt - 1);
    }
    res = min(res, tmp);
  }
  // プラスから折り返す
  rep(i, min((int) plus.size(), k)) {
    ll tmp = 0;
    tmp += 2 * plus.at(i);
    int minusCnt = k - 1 - i;
    if (minusCnt > (int) minus.size()) {
      continue;
    }
    if (minusCnt > 0) {
      tmp += minus.at(minusCnt - 1);
    }
    res = min(res, tmp);
  }
  // 全部どちらかの場合
  if ((int) minus.size() >= k) {
    res = min(res, (ll) minus.at(k - 1));
  }
  if ((int) plus.size() >= k) {
    res = min(res, (ll) plus.at(k - 1));
  }
  cout << res << endl;
  return 0;
}
