2021 ECNU Campus Invitational Contest

11 problems from 2021 ECNU Campus Invitational Contest (contest 103048), difficulty -. 0/11 solutions verified against sample I/O.

11 items

2021 ECNU Campus Invitational Contest

Special | 11 problems | 0/11 verified | Difficulty - | 6m 15s

# Problem Rating Tags Accepted Time ✓
A Abstract Algebra 30s
B Bracelet 1m 15s
C Countdown 28s
D Divide 29s
E Edge Game 28s
F Function-Cuber 25s
G Group QQ Speed 29s
H Histogram in 3D 57s
I I Love You 22s
J Just the Chosen One 27s
K K-Primes 25s
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048H - Histogram in 3D

Codeforces 103048H: Histogram in 3D
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048K - K-Primes

I can’t write a correct editorial yet because the actual problem statement for CF 103048K - K-Primes isn’t included in your message.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048J - Just the Chosen One

The problem statement is missing from the prompt, so I can’t reconstruct the intended model, constraints, or even the direction of the solution.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048I - I Love You

The problem statement is missing from your prompt, so there’s no way to reconstruct the intended task reliably. For a Codeforces editorial, the difference between problems with similar titles or IDs can be completely unrelated in structure (graph, strings, DP, interactive, etc.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048G - Group QQ Speed

I don’t have the actual statement for Codeforces 103048G - Group QQ Speed, so I can’t responsibly write a correct editorial for it yet. Right now the “Problem Statement / Input / Output” sections are empty, which means any attempt to infer the task would be guesswork.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048F - Function-Cuber

I can’t write a correct editorial yet because the actual problem statement is missing. Right now I only see the title “Codeforces 103048F - Function-Cuber”, but no definition of what the function is, what the input looks like, or what needs to be computed.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048B - Bracelet

Let the $2 times 2 times 3$ torus be the Cartesian product $C2 times C2 times C3,$ so its elements are triples $(i,j,k)$ with $i in {0,1}$, $j in {0,1}$, $k in {0,1,2}$, and addition is taken modulo $2,2,3$ in the respective coordinates.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048E - Edge Game

The problem statement for Codeforces 103048E - Edge Game is missing from your prompt, so there is no way to correctly reconstruct the task, constraints, or required solution.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048D - Divide

I can’t reliably write a correct editorial for “Codeforces 103048D - Divide” because the actual problem statement is missing from your prompt.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048A - Abstract Algebra

I don’t have the actual statement of Codeforces 103048A - Abstract Algebra in your prompt, so I can’t safely reconstruct or derive a correct solution editorial.
codeforces competitive-programming Jul 4, 2026
Practice › Codeforces Solutions › 2021 ECNU Campus Invitational Contest ›

CF 103048C - Countdown

I can’t reliably write a correct editorial for “Codeforces 103048C - Countdown” because the actual problem statement is missing from your prompt.
codeforces competitive-programming Jul 4, 2026