We need to delete minimum number of vertices from directed graph, so that after this operation , there is no cycle in the graph ?
→ Pay attention
Before contest
IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
23:17:20
Register now »
IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)
23:17:20
Register now »
*has extra registration
→ Streams
→ Top rated
| # | User | Rating |
|---|---|---|
| 1 | jiangly | 3976 |
| 2 | tourist | 3815 |
| 3 | jqdai0815 | 3682 |
| 4 | ksun48 | 3614 |
| 5 | orzdevinwang | 3526 |
| 6 | ecnerwala | 3514 |
| 7 | Benq | 3482 |
| 8 | hos.lyric | 3382 |
| 9 | gamegame | 3374 |
| 10 | heuristica | 3357 |
→ Top contributors
| # | User | Contrib. |
|---|---|---|
| 1 | cry | 168 |
| 2 | -is-this-fft- | 165 |
| 3 | atcoder_official | 161 |
| 3 | Um_nik | 161 |
| 5 | djm03178 | 157 |
| 6 | Dominater069 | 156 |
| 7 | adamant | 154 |
| 8 | luogu_official | 152 |
| 9 | awoo | 151 |
| 10 | TheScrasse | 147 |
→ Find user
→ Recent actions
Codeforces (c) Copyright 2010-2025 Mike Mirzayanov
The only programming contests Web 2.0 platform
Server time: Jan/19/2025 18:17:40 (j3).
Desktop version, switch to mobile version.
Supported by
Sorry, NP-Complete: Feedback vertex set
thank you !!!