i say this from my experience practicing, and not from my experience in contest. i do safer things in contest so im less likely to fail test case 2, and when i do, i will agree its almost always my fault. however, when i do problems outside of contests i frequently fail test case 2, and i would like to say this shiuldnt happen as frequently as it does. i see a lot of problemsetters make up for the fact their div2c is too easy and make it harder by testing for edge cases outside of test 1. this is not good problem design. a contestant should be able to get a good test from the given test case and not have to make their own and brute force verify it. obviously a contestant looking through the test case for an answer without reading the question should be given a hard time, but if i ended up not solving a problem or getting a neg because of a single edge case i missed in contest, i would be very upset. test one also shouldnt give people a false solution but ill refrain from talking about that here. i am open to any critism in the comments. im new, so if theres any idea you think im missing here please let me know.
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Codeforces (c) Copyright 2010-2026 Михаил Мирзаянов
Соревнования по программированию 2.0
Время на сервере: 18.04.2026 04:19:56 (k2).
Десктопная версия, переключиться на мобильную.
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The problem with practice/upsolving here is that it's impossible to download full testcases. Atcoder at least uploaded theirs to a dropbox or something but on CF it's just truncated mess for literally no reason.
uhh Atcoder removed their dropbox ig. It wasn't working a couple of weeks ago
from my POV, its important to learn thinking of edge cases by ourselves. this is part of problem solving. sometimes it is frustrating but it forces us to grow.
maybe there is some overdependence on these test cases, but i believe in a time sensitive contest we shouldnt force people to have to make their own test cases.
Prove your solutions, at least in your head
Many problem have only one possible method of constructing the sol'n, revealing more than required test cases risk the sol'n pattern being spotted without actual effort.
awwwww, you dont like proving your solutions? why dont the setters give you all the testcases and you can manually solve using if-else, yayayayyyyy, you are LGM, congrats. ohhhhh, now you dont like writing the code, why not make the problems just fill in the blanks. ppl like you will find someone else to put the blame on even if you are given the whole soln and you arent able to solve it. keep up the cope.
can we keep this negativity off the site, you're expert u should know better than this :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up:. for my blind audience: :waving_hand: :raised_back_of_hand: :hand_with_fingers_splayed: :raised_hand: :vulcan_salute: :ok_hand: :pinched_fingers: :pinching_hand: :victory_hand: :crossed_fingers: :love_you_gesture: :sign_of_the_horns: :call_me_hand: :backhand_index_pointing_left: :backhand_index_pointing_right: :backhand_index_pointing_up: :middle_finger: :backhand_index_pointing_down: :index_pointing_up: :thumbs_up: :thumbs_down: :raised_fist: :oncoming_fist: :left_facing_fist: :right_facing_fist: :clapping_hands: :raising_hands: :open_hands: :palms_up_together: :handshake: :folded_hands: :writing_hand: :nail_polish: :selfie: :flexed_biceps: :rightwards_hand: :leftwards_hand: :palm_down_hand: :palm_up_hand: :index_pointing_at_the_viewer: :heart_hands: :hand_with_index_finger_and_thumb_crossed: :leftwards_pushing_hand: :rightwards_pushing_hand: :handshake: :raised_back_of_hand_light_skin_tone: :thumbs_up_medium_skin_tone: :thumbs_down_dark_skin_tone: :handshake_light_skin_tone: :raising_hands_medium-dark_skin_tone: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up: :thumbs_up:(translation generated with help of AI)
Samples aren't there to solve the problem for you.
it's called codeforces not guessforces, you have to prove ur solutions before writing them.