concac
long long I RANK
119,192 POWER LEVEL
Activity
332 submissions in 2026
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
M W F
Less More
Difficulty Breakdown
8 problems solved
Recent Activity
Solves, roadmap, quests & quizzes
TCP Full Duplex Jul 17, 08:39 AM
Domain Correct
Window Scale Option Jul 17, 08:39 AM
Domain Correct
TCP Keepalive Jul 17, 08:38 AM
Domain Correct
MSS and MTU Jul 17, 08:26 AM
Domain Correct
TCP vs UDP: When to Choose TCP Jul 17, 08:26 AM
Domain Correct
TCP Retransmission Jul 17, 08:25 AM
Domain Correct
TCP Header Flags Jul 17, 07:53 AM
Domain Correct
TCP Sequence Numbers Jul 17, 07:52 AM
Domain Correct
TCP Four-Way Close Jul 17, 07:52 AM
Domain Correct
TCP Nagle's Algorithm Jul 17, 07:52 AM
Domain Correct
TCP TIME_WAIT State Jul 17, 07:51 AM
Domain Correct
TCP Three-Way Handshake Jul 17, 07:49 AM
Domain Correct
Put a ring on it. Jul 16, 08:23 AM
Core AC
Put a ring on it. Jul 16, 08:19 AM
Core AC
Put a ring on it. Jul 16, 08:19 AM
Core AC
Put a ring on it. Jul 16, 08:18 AM
Core AC
Put a ring on it. Jul 16, 08:16 AM
Core WA
Put a ring on it. Jul 16, 08:13 AM
Core AC
I'm single. Jul 13, 09:14 AM
Core CE
I'm single. Jul 13, 09:14 AM
Core CE
Best Solves
Hardest problems solved
#1
Harder 6
I'm single.
#2 Normal 3
The Answer to the Ultimate Question of Life, the Universe, and Everything
#3 Easy+ 2
Know your limits. (Hard version)
#4 Easy+ 2
CorrelationTTV (Easy version)
#5 Easy 1.5
Know your limits. (Easy version)
#6 Easy 1.5
It's over for you. (if you can't do this)
#7 Easy 1
Put a ring on it.
#8 Easy 1
Add to 13