#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, k;
  cin >> n >> k;
  int a[n + 1];
  for (int i = 1; i <= n; i++) cin >> a[i];
  sort(a, a + (n + 1));
  int sum = 0;
  for (int i = 1; i <= k; i++) sum += a[i];
  cout << sum << "\n";
  return 0;
}
