谢谢各位大佬orz

#include<iostream>
#include<algorithm>
#define N 10025
using namespace std;
int m,n;
int l,r;
int a[N];
int mid;
int tim,tot;
inline bool judge(int max,int num){
	for(int i=1;i<=n;i++){
		if(tot+a[i]<=max) tot+=a[i];
		  else{
		  	tot=a[i]; tim++;
		  }
	}
	return tim<=num;
}
int main()
{
	ios::sync_with_std-io(0);
	l=0;r=0;
	int ans;
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>a[i]; 
		r+=a[i];  l=max(l,a[i]);
	}
	while(l<=r){
		mid=(l+r)>>1;
		tot=0; tim=1;
		if(judge(mid,m)) {
			ans=mid; r=mid-1;
		}
		else l=mid+1;
	}
	cout<<mid;
	return 0;
}