http://www.luogu.org/problem/show?pid=1182

用二分答案，check即可

#include
    
     #include
     
      #include
      
       #include
       
        #define ms(i,j) memset(i,j, sizeof i);using namespace std;int n,m;int a[100005];bool check(int x)//大于m return 1;{	int ans = 1;	int tot = 0;	for (int i=1;i<=n;i++)	{		if (tot+a[i]<=x) tot+=a[i];		else {ans++; tot = a[i];}	}	if (ans>m) return 1;else return 0;}int main(){	scanf("%d%d", &n ,&m);	int l = 0,r = 0;	for (int i=1;i<=n;i++) {scanf("%d", &a[i]); r+=a[i]; l = max(l, a[i]);}	while (l