# ZIO 2024 discussion

Also,
Does anyone know when the results usually come out?

Usually results will come in 1-2 weeks

Mine 1st answer is same as yours but others are different thatâ€™s why I am nervous to say

Wait so like are all your answers different or some partsâ€¦ you can write them here so we can compare

I got this

btw p2, a should be 2. I wrote 3 by mistake.
But the ideas are basically
q1: everything is counted 2^(n-1) times
q2: if final numbers are a+1,a+2 â€¦.
Then number of steps is sigma |a+i-ith number| and it is easy to minimise this
q3: basically draw the tree and give each edge frequency f=no of vertices one side * number of vertices on other side
So we wanna maximise sigma f * weight which is just rearrangement inequality, sort both the same way then take components wise product
q4: this is just basic combo, so case work on number of bad sets by size

2c is 29 right? Or am I tripping lmao. Starts from 10 and goes to 29

Wait wasnâ€™t the question how many steps you would require? So yeah it is 10-29 but steps required are more?

Mine Except 1st and 2a and 2b all are different
According to me 2c should be 65

In question 1 we only have add minimum and maximum integer in s list

yeah I got 29 steps somehow, the original list was from 9 to 35 right

Is this true?

Hmm looking sweet almost all of my answers match yours only difference is
P2 i) it is 2 i noticed is a mismark
P3 iii) i got 5054, you can solve this by creating incidence matrices. similar to your idea but potential calculation error? i verified this one with 2 other friends of mine
P4 iii) i got 1020638

ps. got another 2 friends of mine who got 1020637 for p4 iii) could someone verify that up?

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Source sir ? If it is true tho, I will be very very happy

@rolo

1. 9
2. 48
3. 1081
Because according to question it can be we have to arrange array in line like a1, a2, a3 not like a3, a1, a2

I think it is false

Wow I hope I didnâ€™t accidentally mark 3 instead of 2 for that stupid questionâ€¦
For the third graph question, I am pretty sure it should be 4866, I smuggled my rough paper out, so I have the entire question written, and I verified it again just now (look at the attached photos) So either I copied the question wrong which would be so sad or you and your friends might have made a similar errorâ€¦
For problem 4 you are right, answer should be 1020638â€¦ I am so mad, I did so much work on that question and to make such a silly calculation error in the endâ€¦ wowâ€¦
Btw, congratsâ€¦ it seems that you have done really well, I came out of the exam hall thinking Iâ€™m getting 80 and now to see these three silly and stupid errors is really annoying, I just hope 50-60 qualifies for class 12â€¦

My answers are quite unreliable as I am from class 8 and only expect to get 55/80 or 60/80 (4b)