#include <bits/stdc++.h>
using namespace std;
int N, K, p[1010];
int main() {
  cin >> N >> K;
  for (int i = 0; i < N; ++i) cin >> p[i];
  sort(p, p + N);
  int ans = 0;
  for (int i = 0; i < K; ++i) ans += p[i];
  cout << ans << endl;
}
