I can't understand why I got Wrong Answer?
I use a DP method,and I am afraid that I got wrong answer here.

Here's my program:

#include<iostream.h>
#define MAX 500

void read();
void work();
void write();

long n,f[MAX+1][MAX+1];

int main()
{
    read();
    work();
    write();
    return 0;
}

void read()
{
    cin>>n;
}

void work()
{
    unsigned int k,m,i,j;
    f[0][0]=1;
    k=n;
    for (m=1;m<n;m++)
        {
            for (i=m;i<=n;i++)
            {
                for (j=k;j>0;j--)
                {
                    f[i][j]+=f[i-m][j-1];
                }
            }
        }
    f[n][n]=1;
}

void write()
{
    unsigned long total,i;
  total=0;
    for (i=1;i<=n;i++)
    {
        total+=f[n][i];
    }
  cout<<total<<endl;
}

Thank you!

program ural1017;
var
  q:array[0..500]of int64;
  n,i,j:integer;
begin
  fillchar(q,sizeof(q),0);
  readln(n);
  q[0]:=1;
  for i:=1 to n do
    for j:=n downto i do
      inc(q[j],q[j-i]);
  writeln(q[n]-1);
end.