import CoreFoundation

let arr = readLine()!.characters.split{$0==" "}.map{Int(String($0))!}
let n = arr[0]
let k = arr[1]

var i: Int = 0
var ret: Int = 0

var h = readLine()!.characters.split{$0==" "}.map{Int(String($0))!}
var sumH: Int = 0

h.forEach { sumH += $0 }

h = h.sort{$0>$1}

if( k >= h.count ) {
  print(0)
  exit(0)
}

if(k < (h.count / 2)) {
  for i in 0..<k {
    sumH -= h[i]
  }
  ret = sumH
} else {
  for i in k..<h.count {
    ret += h[i]
  }
}

print(ret)