[PAT]数列求和（20）

#include "stdio.h"
#include "malloc.h"
#include "math.h"
void calc(int num,int N,long *data);
int main()
{
    int N,num;
    long *result;
    scanf("%d",&num);
    scanf("%d",&N);
    result=(long *)malloc(N*sizeof(long));
    calc(num,N,result);
    return ;
}
void calc(int num,int N,long *data)
{
    long i=;
    long val=;
    long dif;
    int j;
    if(num<=||N<=)
    {
        printf("");
        return;
    }
    for(i=;i<N||val>;i++)
    {
        val=val+num*(N-i);
        dif=val%;
        data[i]=dif;
        val=(val-dif)/;
    }
    for(j=i-;j>=;j--)
    {
        printf("%ld",data[j]);
    }
}