记录+ 题目传送门

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int maxx(int x,int y){
	return x>y;
}
int main(){
	ll n,a,b,su=0;
	cin>>n>>a;
	ll c[n+1];
	for(ll i=0;i<n;i++){
		cin>>b;
		su+=b;
		c[i]=b;
	}
	sort(c,c+n,maxx);
	for(ll j=0;j<a;j++){
		su-=c[j];
	}
	if(a>=n){
		cout<<0;
	}else{
		cout<<su;
	}
return 0;
}