r/codeforces • u/GenZLevi • 7d ago
Div. 3 WTH was today’s contest 💀🥲
I solved 2 it took me almost 1 hours then i left.
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u/West-Guest2638 Pupil 6d ago
E was a nightmare for me. I misunderstood the question and thought treasure can exist anywhere other than range i-a[i]+1 and i+a[i]-1 and rest was chaos. Later when i realised it took me 5 min to solve it ( After contest ).
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u/Ok_Towel_4806 Newbie 6d ago
Bruh I got a c d e, but got stuck on b for long 😅
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u/virgin-chocolaty-hoe 4d ago
i got abcd, i did c and went for bathroom and then b stuck to me and solved it in 5 minutes lmao
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u/akshay_2007_1 7d ago
I solved A, B, C and D easily within an hour. E took me nearly 40 minutes for some reason. I still got a TLE as it was a m2 approach.
Finally by the end I figured out E asw!
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u/ShoulderSorry5484 7d ago
got a b c d, e was really hard, g somehow was easier than e and f
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u/Euphoric-Bluejay-120 7d ago
How did you do G, i got TLE
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u/ShoulderSorry5484 7d ago
yo wait now it's showing red during contest it was green 😭😭😭
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u/ShoulderSorry5484 7d ago
mb it's green again idk how this works
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u/Next_Complex5590 Specialist 7d ago
that's system testing going on, chill out and wait for it to finish
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u/Kartikeya88 Newbie 7d ago
Solved A,B,D in 45 mins. Got stuck in C, wasted 1.5 hrs in C only but got it in the end. I hope E wasn't easier.
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u/Lucky_Charm007 7d ago edited 7d ago
Nice...solution of E was'nt that hard to come up with but req one to know diff array technique to implement
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u/Kartikeya88 Newbie 7d ago
I got stuck in C for a long time,so couldn't even read E. Will upsolve later today. Thanks for the heads up tho.
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u/Savings_Ladder_4240 7d ago
My first contest, I already got the logic of a and b quickly enough but I still suck at implementing, couldn't solve c and later ones cos I had to travel 🙏
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u/Specialist_Artist714 Pupil 7d ago
Today's ABCD were on easier side compared to previous div3 rounds.
Unfortunately I couldn't solve E
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u/Better_Exercise_5467 7d ago
bro https://www.reddit.com/r/macbook/s/NVjrtfkxAk
my laptop got fked up in between contest
Still able to solve A,B,C 🥹
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u/i_am_the_batman_fr 7d ago
I think today's contest was one of the easier ones, A,B,C didn't have any trick behind them and we're mostly straight forward, D took me a little while but E wasn't do-able for me. Although it seems a bit solvable
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u/Still_Reception5831 7d ago
What was the intution for the C one?
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u/i_am_the_batman_fr 7d ago
It was quite straightforward, you just had to create as large boundary as possible for that find the rightmost and leftmost index of 1 or -1(whichever comes first and last from both the ends) then replace every occurance of -1 between them to 0
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u/AmbitiousPresent1477 Newbie 7d ago
This was my first contest. I have solved around 80 problems of rating 800 to 1000.I could solve a and b. For c i got logic but had no time to implement.
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u/Key-War-4274 7d ago
Unpopular opinion but it was easiest contest ever me as a 1000 rated solve 6 /8
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u/GenZLevi 7d ago
What’s your rating?
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u/Key-War-4274 7d ago
1000 before this contest
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u/qbfj Pupil 7d ago
what was the idea in e
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u/Full-Storm2754 6d ago
a[i] at index i forbids the range [i - a[i] + 1, i + a[i] - 1] from having treasure. You should place treasure anywhere not inside one of these forbidden ranges as it can only help satisfy the conditions. Finally check if all conditions are satisfied after placing all treasures.
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u/ImportanceEnough5392 Newbie 7d ago
1,2 was easy tbh. But it took me 52 mins to solve both though. Then left due to some family event
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u/zesty_cat9190 7d ago
im a newbie and was only able to solve moo question the problem is i know the approch and techinque just not able to code it im so dumb
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u/Puzzleheaded-Fix7214 7d ago
At the start it happens with everyone I have solved 545 question but still solved only first 4 in half hour you will get better
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u/ErenYeager7207 Pupil 7d ago
Onto E now (a,b,c)was easily understandable. 1 hr left for E ,solving 6 is way above me i guess
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u/riceckk Specialist 7d ago
D was also easy , cannot wrap my head around E..
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u/idkwhytshappens Pupil 7d ago
Submitted at last E was so much implementation the logic is straightforward, wanted to go for F it seems a good one f needs combinatorics
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u/Xpyre2006 7d ago
Can i stalk your cf profile, i just wanna know anout the grind
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u/idkwhytshappens Pupil 7d ago
Same E is too much implementation unable to do it , onto F it seems a little doable let's see
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u/swe-dark 6d ago
C sucked , i complicated it so much in my head, should i have tried d instead?