#include <bits/stdc++.h>
using namespace std;
int main()
{
int i, n, m, a[100001];
cin >> n >> m;
for(i=0;i<n;i++) cin >> a[i];
sort(a+0,a+n);
int res=0;
for(i=n-m;i<n;i++) res+=a[i];
cout << res;
return 0;
}
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