> #include<stdio.h>
> 
> int main()
> {
>     int day;
>     while(scanf("%d", &day), day)
>     {
>         int n = 1;
>         while((1+n)*n/2 < day) n++;
>         printf("%d %ld\n", day, (n-1)*n*(2*n-1)/6 + n*(day-(n-1)*n/2));
>     }
>     return 0;
> }

• Re:平方和公式犀利 (6) ziqiangyeah 2013-08-02 17:04:18