#include <bits/stdc++.h>
template <typename A, typename B>
bool cmin(A &a, const B &b) {
  return a > b ? (a = b, true) : false;
}
template <typename A, typename B>
bool cmax(A &a, const B &b) {
  return a < b ? (a = b, true) : false;
}
const double PI = acos(-1);
const double EPS = 1e-9;
int inf = sizeof(int) == sizeof(long long) ? 2e18 : 1e9 + 10;
int dx[] = {0, 1, 0, -1};
int dy[] = {1, 0, -1, 0};
using namespace std;
using ll = long long;
using P = pair<int, int>;
int main() {
  int n, k;
  cin >> n >> k;
  vector<int> p(n);
  sort(p.begin(), p.end());
  ll ans = 0;
  for (int i = 0; i < (k); ++i) ans += p[i];
  cout << ans << endl;
  return 0;
}
