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o/p correct in terminal but giving wrong on cf test 4 help
By reaper28, history, 5 years ago, In English

question : https://codeforces.me/problemset/problem/1299/A solution : https://ideone.com/7l3fWY can anyone point out the error?

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5 years ago, # |
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Probably you should initialize arrays: ll pre[n+1] = {}; ll suf[n+1] = {};

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