ZIO 2022 Discussion

general
6

Since confidence levels drop because of ZIO, don’t stress.

6 Likes
7

Hello all, This us my first time in zio , I am sure that q3 is correct , but q1 might not be . Btw, does anybody have any idea about cutoffs of class 7 and below? I am in class 6

8

Can Anybody Please share me answers of 2b,2c and 4c

1 Like
9

I think Problem-1 and 3 are so easy. The first two subtasks of problem-4 are also easy However Subtask-3 of problem-4 was little harder. I think most tough problem was 2nd one.

My answers for 2b,2c,4c,3c might be wrong

3 Likes
10

50 for class 11 (calculated with respect to most frequent answer in each que). Will I pass or should I register for ZCO?

11

@saarang123 please also add class/grade section in google forms so that we will be able to get an idea of cutoffs for different grades.

3 Likes
12

answers
Q1.
a)4 {GBGBGBGBG}
b)6 {BGBGBGBGBBB}
c)6 {GBGBGBGBGBGBGGBGBGG}
Q2.
f(n+1) = sum{k=1 to n+1} * f(k-1) * f(n+1-k)
a)46
b)42
c)16796
Q3.
a)127 (sum up the road length}
b)40 {sum up the alternatives length}
c)236 {start checking from the ending nodes and then sum up}
Q4.
a)2 { 1 2 1 1 }
b)20 {2^19 = 19+1 which is 20}
c)864 {3 4 1 3 2 3 1 2 2 1 1 1 1 1 1 1 1 1 }

2 Likes
13

@atoner you should register for zco if you are not sure you will pass.

14

I think answer for problem 1c should be 8. Please explain your approach for problem-1.

1 Like
16

My answer is also coming 8, but some IOITC achievers have told me the answer.
My marks are 45 (Class 9th) and they can be 55 if the answer would be 8.

17

Is answer key already released i cant find it on offical iarcs website.

18

4c is 13 i think?

19

I’m in Class 9 and am expecting 35 (based on the most frequent answer to each question). What are my chances?

20

Will ZIO results be announced before ZCO is held?

21

for 1c I got 10.
as far as I remember there were 11 G’s and 8 B’s so the optimal string that could be obtained is
GBGBGBGBGBGBGBGBGGG. I compared this string with the one given in the question and there was a difference of 10 letters, which included 5 G’s and 5 B’s, so I answered it as 10.
However, I am not sure whether this approach is correct.

22

Nope,

In exam hall i got 8 as answer. The optimal solution is GGBGBGBGBGBGBGBGBGG

However, I solved the problem just and 2-3 min ago and found answer 6. The optimal solution is to place students as GGBGBGBGBGBGGBGBGBG.

23

Are you sure provided answers are correct??

24

Any idea about cutoff for class 9?

25

Yes

26

Please do pool your scores in the below link here to get an exact idea of how everyone performed.

Google forms : https://forms.gle/AXSMX3rZqM5SUczq5

Spreadsheet : https://docs.google.com/spreadsheets/d/1Xo3HuI3yb6bVeLyyXtLP-Boq2Kp90YszECgNluIlQkE/edit?usp=sharing