I attempted to solve this problem E — Count Sequences 2 from the recent ABC. This was my submission, using my modint template. But it received WA on 45 testcases. Replacing my template with taking mod with % passed easily (submission). Is there a bug in my modint template? Please help me out, I can't figure out any mistake. The template is taken mostly from the-tourist/algo and atcoder library.
→ Pay attention
→ Streams
→ Top rated
| # | User | Rating |
|---|---|---|
| 1 | Benq | 3792 |
| 2 | VivaciousAubergine | 3647 |
| 3 | Kevin114514 | 3611 |
| 4 | jiangly | 3583 |
| 5 | strapple | 3515 |
| 6 | tourist | 3470 |
| 7 | Radewoosh | 3415 |
| 8 | Um_nik | 3376 |
| 9 | maroonrk | 3361 |
| 10 | XVIII | 3345 |
→ Top contributors
| # | User | Contrib. |
|---|---|---|
| 1 | Qingyu | 162 |
| 2 | adamant | 148 |
| 3 | Um_nik | 145 |
| 4 | Dominater069 | 143 |
| 5 | errorgorn | 141 |
| 6 | cry | 138 |
| 7 | Proof_by_QED | 135 |
| 7 | YuukiS | 135 |
| 9 | chromate00 | 134 |
| 10 | soullless | 132 |
→ Find user
→ Recent actions
Codeforces (c) Copyright 2010-2026 Mike Mirzayanov
The only programming contests Web 2.0 platform
Server time: May/17/2026 14:20:32 (g1).
Desktop version, switch to mobile version.
Supported by
the unsigned int can fuck up the modulo if you under/over flow
The first submission wouldn't be correct with any
modintimplementation. Check diff between the two submissions.Yes I had to call
precompute()after I domint::set_mod(m). Thanks for pointing it out!