Help!
Difference between en4 and en5, changed 1 character(s)
- **I can't think of a DP for this task help plz**↵
_Find the number of sequences (a1, a2,..., an) such that_↵
a[i]^2 + a[i + 1]^2 + ... + a[n]^2 = k↵
a[i] <= a[i + 1] <= ... <= a[n]↵

- T is testcase↵
- n is quantity of number↵
- k is a[i]^2 + a[i + 1]^2 + ... + a[n]^2 = k↵

- 1 <= T <= 1e5↵
- 1 <= n <= 100↵
- 1 <= k <= 5000↵
- example↵
- input↵
- 1↵
- 4 243↵
- output ↵
- 9↵

- Explanation↵
- first 1 1 4 15  -> (1 * 1) + (1 * 1) + (4 * 4) + (15 * 15) = 243                                                                                                                                                              &mdash; second 1 3 8 13                                                                                                                                                                 &mdash; third 1 7 7 12                                                                                                                                                                &mdash; fouth 3 3 9 12                                                                                                                                                                &mdash; fifth 3 4 7 13                                                                                                                                                                 &mdash; sixth 3 7 8 11                                                                                                                                                                &mdash; seventh 4 5 9 11                                                                                                                                                                &mdash; eighth 5 5 7 12                                                                                                                                                                &mdash; nineth 7 7 8 9

#### History

Revisions

Rev. Lang. By When Δ Comment
en5 DEAMN 2021-04-19 10:39:42 1
en4 DEAMN 2021-04-19 09:57:26 136
en3 DEAMN 2021-04-19 09:54:55 51
en2 DEAMN 2021-04-19 09:52:44 62 Tiny change: '**I can't ' -> '- **I can't '
en1 DEAMN 2021-04-19 09:50:35 1774 Initial revision (published)