Comments
+18

The contest is now also available in the gym.
+10

Hi! The problems are available for upsolving in the gym
+111

orz
On T1duS → IOI 2021 predictions, 5 years ago
0

orz
+61

McDic orz
On samchen123 → Study Algorithms!, 6 years ago
+10

numb so rude
On samchen123 → Study Algorithms!, 6 years ago
+8

Good luck sir!
+25

Thank you sir
+99

We need a stefdasca x tmwilliamlin168 crossover.
0

For each node you can precompute jumps with lengths powers of 2 and answer queries using binary lifting.
+166

0

Orz
+25

Div 1 orz
+29

Use kmp
+2

This is known as maximum matching in a bipartite graph and can be solved using Hopcroft Karp
+28

Maybe this can help: https://mirror.codeforces.com/blog/entry/47516
+4

We hang out on the same lake.
+8

Awesome, thanks for sharing
+13

Great!
+12

I assume it is because your comp breaks the sort. Here is the modified correct version: https://mirror.codeforces.com/contest/1185/submission/55805231
+3

You should calculate exponent modulo phi(MOD) which is MOD-1 in this case.
+22

It's just a Controlled Not gate. https://en.wikipedia.org/wiki/Controlled_NOT_gate
+22

lol Are you taking quantum computing classes for the Olympiad?
+1

It seems that the round is planned to begin at 12:00 Moscow time, contrary to what we were announced in the last e-mail. "December 16 at 16:00 Moscow time."
0

Only russian statements too.
+55

Author had solution for G, but this tutorial is too small to contain it.
0

There's an appearance issue in C tutorial
+5

English tutorial for E?
On GreenGrape → Codeforces Round #505, 8 years ago
0

Expected output?
On GreenGrape → Codeforces Round #505, 8 years ago
+10

Hack for D : 5 2 3 5 7 210 Answer : NO
0

What about long long main() ?
0

What the problem meant is: If you replace every character in s with f(s[i]) you should get string t. Meaning that "aab" and "abb" are not isomorphic since running s through your function would create string "bba" and not "abb".
+3

Can someone explain their solution for E? I was thinking about something involving cliques but couldn't figure it out.
0

I finally understand. Thank you so much.
+4

Could anyone explain me the solution to div2 D. I can't seem to understand why this always works. For 4 4 1 2 3 wouldn't the output be 4 1 2 3?