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DP,Why WA,

Posted by lookus at 2004-10-01 13:56:56 on Problem 1160
好像没问题啊,我查了好几次啦

#include <stdio.h>
#include <string.h>
int n,m;
int x[301];
void main()
{
	int i,j,k,l,tm;
	int p[301][301],q[301][31];
	////p[i][j] 表示村庄i到j间修一个邮局的最小花费。
	////q[i][j] 表示前i个村庄修j个邮局的最小花费
	scanf("%d%d",&n,&m);
	memset(q,0,sizeof(q));
	for(i=0;i<n;i++)
		scanf("%d",&x[i]);
	memset(p,0,sizeof(p));
	for(i=0;i<n;i++)
		for(j=i+1;j<n;j++)
		{
			l = i+(j-i)/2;
			for(k=i;k<l;k++)
				p[i][j] += (x[l]-x[i]);
			for(k=l+1;k<=j;k++)
				p[i][j] += (x[k]-x[l]);
		}
	for(i=0;i<n;i++)
		q[i][1] = p[0][i];
	for(i=0;i<n;i++)
		for(j=2;j<=m;j++)
		{
			q[i][j] = 2000000000;
			for(k=j-2;k<i;k++)
			{
				tm = q[k][j-1] + p[k+1][i];
				if(tm<q[i][j])
					q[i][j] = tm;
			}
		}
		printf("%d\n",q[n-1][m]);
}

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