#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, k, count = 0;
  int s[1005] = {0};
  cin >> n >> k;
  for (int i = 0; i < n; i++) cin >> s[i];
  sort(s, s + n);
  for (int i = 0; i < k; i++) count += s[i];
  cout << count << endl;
  return 0;
}
