ZIO 2017 Discussion

general
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21

Guys my 8 out of 12 questions are correct… i.e. 50 out of 80… will i qualify…??
The cutoff of the previous years was less than 50… so…??

22

Hey, i’m a class 8th student too.
I took part in ZCO and i think i will score around 50 marks.
will i be able to qualify?

P.S. when are the results coming?

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23

Paper was significantly easier than usual this year. Cutoff should be around 50 for 12 in my opinion.

24

How is everyone getting a larger answer for 4c than for 4b??

Even though the 4c binary string is longer than the 4b one, there are some bits in 4c which cannot appear in any good number. I can’t remember the exact strings, but for instance, the second bit in the 4c string was a 1 which has to be dropped for all possible good numbers since there must be at least two zeroes before a 1 in a good number and it is impossible to have two zeroes before the second position. Similarly, the zeroes at the end of the 4c string must also be dropped since they cannot be followed by a 1. Such reductions make the 4c string a sub string of the similarly reduced 4b string. (Do I make sense?)

I can’t remember my 11 & 12 answers because I changed them at the last minute, realizing I had been undercounting. But I’m relatively confident of this much; so I’m surprised that everyone seems to have larger 4c answers than 4b ones.

25

Did anyone else face problems with the interface during ZIO?

26

All of you are getting answer for question 2 part 2 as 10, but I think it is 9. Based on my memory I remember the values were
1-6
2-7
3-7
4-8
5-8
6-9
And a few more with 9.
So if 1 seeks for 3 rounds, 2 and 3 seek for 2 rounds each and 4 and 5 seek for one round each, I think every one will be satisfied.
Please point out if I have made a mistake.
All the best to everyone for results !

27

anyone remember testcases of 1st question or atleast the example. plz post them if u do remember

28

Hello friends this is what I got in ZIO 2017 …

Q1 1.) 60
2.) 14
3.) 30
Q2 1.) 104
2.) 199
3.) 593
Q3 1.) 15
2.) 10
3.) 141 (surely wrong)
Q4 1.) 21
2.) 144
3.) 155

Pls confirm the answers of Q4.) part B and C …

29

Everyone please post the following things-

  1. Expected cut-off for 1) class 10th and below, 2) class 11th, 3) class 12th
  2. Your answers
  3. Questions(if you remember)
  4. Answers(if you solved them)
30

What will be cut-off for class 12th?
I am expecting to get 65, will i be able to get qualified for INOI 2017?

31

When will the results come out ?

1 Like
32

Ok guys, these are my answers. I have a doubt on the 9th one, which most people are saying 145, but anyways.

My answers-

  1. 60

  2. 14

  3. 30

  4. 104

  5. 199

  6. 593

  7. 15

  8. 10

  9. 199 [not sure, most probably wrong]

  10. 21

  11. 144

  12. 154 [I wrote 157, I recalculated at home, it is 154, double-counted 3 strings with k=1]

I am in Class 9, am getting a 60 according to this answer key, including 9 and 12 as incorrect. Will I qualify?

33

So by gathering everyone’s answers these are probably the answers (I’m not sure) -

  1. 60
  2. 14
  3. 30
  4. 104
  5. 199
  6. 593
  7. 15
  8. 10
  9. 145
  10. 21
  11. 144
  12. 154
34

My answers were:

1.a-60

b-14

c-30

2.a-104

b-199

c-593

3.a-15

b-10

c-145

4.a-21

b-144

c-154

How much do you think I should be scoring?

I think the cut-off will be 50-60. What do you guys think¿

1 Like
35

i think the cutoff will be around 50 for class 11 and 55 for class 12

1 Like
36

I got
60
14
30
104
199
593
15
10
148
21
138
127

1 Like
37

Can anyone post up the answers and solutions for Q8, Q9, Q11, Q12…??

38

I am in class 11. I got 40 marks in ZIO. Will I qualify for INOI?

39

My answers…

1)60
2)14
3)30
4)104
5)199
6)593
7)15
8)10
9)145
10)21
11)144
12)154

Probably I will get 80 in zio

1 Like
40

I am getting full according to the answer key posted by @mathecodician.
Hope it’s correct.
By the way when will the official answer key and the result come?
Can someone please tell me how to solve the 4th question?
I solved it using brute force.

1 Like