a=list(map(int,input().split()))
l=list(map(int,input().split()))
for i in range(0,len(l)-1):
    for j in range(0,len(l)-1-i):
        if l[j]>l[j+1]:
            t=l[j]
            l[j]=l[j+1]
            l[j+1]=t
s=0
for i in l:
    s+=i
for i in range(a[0]-a[1]):
    s+=l[i]
print(s)
/**************************************************************
	Problem: 1228
	User: admin
	Language: Python
	Result: Accepted
	Time:100 ms
	Memory:34480 kb
****************************************************************/