n,k=map(int,input().split())
p=list(map(int,input().split()))

ans=0
if n!=1:
    for i in range(k):
        min=p[i]
        for j in range(i+1,n):
            if min>p[j]:
                min=p[j]
                p[j]=p[i]
        ans+=min
else:
    ans=p[0]
print(ans)
