wufan1214 2014-03-08 22:53:55
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#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<iostream>
using namespace std;
int a[100010];
int mid;
int n,m;
int maxx(int x,int y)
{
return x>y?x:y;
}
int check()
{
int sum=0,j=1;
for (int i=1;i<=n;i++)
{
sum+=a[i];
if (sum>mid)
{
sum=a[i];
j++;
}
}
if (j<=m) return 0;
return 1;
}
int main()
{
int left=0,right=0;
scanf("%d%d",&n,&m);
for (int i=1;i<=n;i++)
{
scanf("%d",&a[i]);
left=maxx(left,a[i]);
right+=a[i];
}
while (left!=right)
{
mid=(left+right)>>1;
if (check()) left=mid+1;
else right=mid;
}
printf("%d",right);
return 0;
}