RT，剩下的全WA，玄关

#include<bits/stdc++.h>
using namespace std;
int n,m;
int a[1005],b[105];
signed main(){
	//freopen("a.in","r",stdin);
	//freopen("a.out","w",stdout);
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	for(int i=1;i<=m;i++){
		b[i]=a[i];
	}
	for(int i=m+1;i<=n;i++){
		sort(b+1,b+1+m); 
		b[1]+=a[i];
	} 
	sort(b+1,b+1+m);
	cout<<b[m];
	return 0;
}