程序代码：

#include <stdio.h>
#define N 1007

int fun(int ,int ,int ,int);

int main(void)
{
    int  t,m,n;

    scanf("%d",&t);
    while(t--)
    {
        scanf("%d %d",&m,&n);
        printf("%d\n",fun(m,n,1,0));
    }

    return 0;
}

int fun(int m,int n,int i,int sum)
{
    int j;

    if(!m)
    {
        return sum;
    }
    else
    {
        for(j=i;j<=n;++j)
        {
            ++sum;
        }
        return  fun(m-1,n,i+1,sum%N);
    }
}

程序代码：

#define N   1007

int test(int m, int n)
{
    int i, j, k;
    int *arr = new int[n + 1];            

    for (i = 1; i <= n; i++)        
        arr[i] = 1;

    for (i = 2; i <= m; i++)
    {
        for (j = n; j > 0; j--)
        {
            arr[j] %= N;
            if (arr[j] != 0)
            {
                for (k = j + 1; k <= n; k++)
                    arr[k] += arr[j];
            }
            arr[j] = 0;
        }    
    }

    int count = 0;
    for (i = 1; i <= n; i++)
    {
        count += arr[i];
    }
    count %= N;
    
    delete []arr;
    
    return count;
}