B. Biodiversity

Codeforces

IDCF10250B

Time3000ms

Memory256MB

Difficulty—

English · Original

Formal · Original

The input consists of the following lines: *Limits* A string that appears a number of times that is greater than the sum of the others, if there is any, or the string "NONE" otherwise. ## Input The input consists of the following lines: on the first line: an integer $N$; on each of the next $N$ lines: the species of an animal as a string of length at most 20, containing only ASCII alphanumeric characters. *Limits* $1 <= N <= 2 times 10^5$. ## Output A string that appears a number of times that is greater than the sum of the others, if there is any, or the string "NONE" otherwise. [samples]

**Definitions** Let $ n \in \mathbb{Z}^+ $ be the number of friends. Let $ U = (u_1, u_2, \dots, u_n) $ be a sequence of distinct usernames, where each $ u_i \in \Sigma^* $, $ \Sigma = \{A\text{-}Z, a\text{-}z, 0\text{-}9, \_\} $, and $ 1 \leq |u_i| \leq 12 $. **Constraints** 1. $ 1 \leq n \leq 10^5 $ 2. Each $ u_i $ consists only of characters in $ \Sigma $, and $ |u_i| \in [1, 12] $ 3. All $ u_i $ are distinct. **Objective** For each $ i \in \{1, \dots, n\} $, output: $$ u_i : \text{F} $$ on a separate line, in order of increasing $ i $.

API Response (JSON)

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    "name": "B. Biodiversity",
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      "content": "The input consists of the following lines:  *Limits*  A string that appears a number of times that is greater than the sum of the others, if there is any, or the string \"NONE\" otherwise. ",
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