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那位大侠帮我看看这段程序有什么错!老是WA

Posted by gaojinjun at 2006-07-05 10:57:39 on Problem 2479
#include <stdio.h>
#include <stdlib.h>
long b[50000]={0};
long c[50000]={0};
int a[50000]={0};
int MaxSum(int m,int n)
{
    int i,j;
    long max,sum=-500000000;
    if(n<m||m<1)return 0;
    for(i=1;i<=m;i++)
    {
        b[i]=b[i-1]+a[i];
        c[i-1]=b[i];
        max =b[i];
        for(j=i+1;j<=i+n-m;j++)
        {
            b[j]=b[j-1]>c[j-1]?b[j-1]+a[j]:c[j-1]+a[j];
            c[j-1]=max;
            if(max<b[j])max=b[j];
        }
        c[i+n-m]=max;
    }
    for(j=m;j<=n;j++)
       if(sum<b[j])sum=b[j];
    return sum;
}            
int main(int argc, char *argv[])
{
  int i,j,k;
  int n,m;
  long sum[30]={0};
  scanf("%d",&n);
  for(i=0;i<n;i++)
  {
      scanf("%d",&m);
      for(j=1;j<=m;j++)
          scanf("%d",&a[j]);
      printf("\n");
      sum[i]=MaxSum(2,m);
  }    
   for(i=0;i<n;i++)
      printf("%ld\n",sum[i]);   
  system("PAUSE");	
  return 0;
}

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