# | User | Rating |
---|---|---|
1 | tourist | 3803 |
2 | jiangly | 3707 |
3 | Benq | 3627 |
4 | ecnerwala | 3584 |
5 | orzdevinwang | 3573 |
6 | Geothermal | 3569 |
6 | cnnfls_csy | 3569 |
8 | Radewoosh | 3542 |
9 | jqdai0815 | 3532 |
10 | gyh20 | 3447 |
# | User | Contrib. |
---|---|---|
1 | awoo | 163 |
2 | adamant | 161 |
2 | maomao90 | 161 |
4 | maroonrk | 152 |
5 | -is-this-fft- | 151 |
6 | nor | 149 |
7 | SecondThread | 147 |
7 | atcoder_official | 147 |
9 | TheScrasse | 146 |
10 | Petr | 144 |
Name |
---|
If I remember corretly, the mentioned problem from Run Twice contest appeared at Petrozavodsk summer camp 2022. My solution is to check whether the input graph has a $$$4$$$-clique: a random graph should not have it.
Nice! This solution feels a bit borderline to me: the graph has 1% of all edges when m=5000, so roughly speaking the probability of having a 4-clique is C(1000,4)*0.01^6 ~= 1000^4/24/100^6 = 1/24, so it might or might not appear in the ~100 testcases, not all of which have m=5000.