from collections import Counter,defaultdict,deque
from heapq import heappop,heappush,heapify
from bisect import bisect_left,bisect_right 
import sys,math,itertools,pprint,fractions
sys.setrecursionlimit(10**8)
mod = 998244353
INF = float('inf')
def inp(): return int(sys.stdin.readline())
def inpl(): return list(map(int, sys.stdin.readline().split()))
def inpl_1(): return list(map(lambda x:int(x)-1, sys.stdin.readline().split()))
def inplm(): return map(int, sys.stdin.readline().split())
def inpl_1m(): return map(lambda x:int(x)-1, sys.stdin.readline().split())
def err(x): print(x); exit()

n,k = inpl()
a = inpl()
print(sum(sorted(a[1:],reverse=True)[:k]))