anshshah91's blog

Help Needed in recent contest C Problem.
By anshshah91, history, 3 years ago, In English

My submission link:https://mirror.codeforces.com/contest/1617/submission/139558699

What i did was pushed all numbers greater than n in a vector and all number lesser than or equal to n with frequency greater than 1 in the same vector. After that i pushed all numbers of input vector in a set and checked for numbers from 1 to n which were not there in permutation and pushed it in another vector b and then i converted vector a to ma modulo for number at each index also sorted vector a and checked if a[i]<b[i] for some index if found that index answer would be -1 as vector b is already sorted so i cannot further make it more lesser otherwise i printed vector b size.

But it is showing WA on test case 9 pretest 304. Please Help if you find out a flaw also a counter test case would be welcomed too. thank you in advance.

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3 years ago, # |
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Input
Expected Output
Your Output
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3 years ago, # |
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While pushing elements in vector a from the input vector v, you will miss the element at v[0]. For example, if n=4 and input vector v={ 5,2,2,3} then as per ur code vector a will only have a={2}. You are missing 5 here.

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    3 years ago, # ^ |
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    Yes, I figured it out from the test case and got AC. Thank you!!

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