**I. 353.** The game ``Egyszámjáték'' (The Smallest Number Wins Game) was invented by the Hungarian mathematician and psychologist *László Mérő:* in this game each player submits a positive integer between 1 and 10000, and these numbers are collected. Numbers that have been submitted more than once are deleted. The smallest number among the remaining ones wins.

`Example. Players submit the following numbers: 9, 6, 3, 7, 4, 6, 1, 6, 8, 1, 6, 5, 7, 9, 4, 2. We then remove duplicated elements. The remaining numbers are: 3, 8, 5. The player who submitted the smallest such number (3) wins. `

Prepare a sheet to evaluate the game based on the numbers submitted by players in email, and to determine the winner. The file `tippek.txt` (UTF-8 encoded and downloadable from our web page) contains the data for players and the numbers they submitted. For each player we have the following data:

*Tipp* The integer submitted by the player, \(\displaystyle 1\le \mathsf{tipp}\le
10\;000\);

*Név* The player's name (there can be more players with the same name);

*E-mail* The email address of the player, this address is unique.

If there are multiple submissions from the same email address, then only the first submission is taken into account (``valid'') and the others are considered as invalid. You should use a spreadsheet application to solve the following tasks, but user-defined functions or macros cannot be used.

Open the tabulator-separated text file `tippek.txt` in the application according to the *example.* It is enough if your solution handles the data given in this file correctly. Your work should be saved as `i353` in the default application file format. You should format the sheet according to the *example,* and give your answers in the cells adjacent to the messages in columns `D:G` by using expressions. Auxiliary computations can be performed in cells to the right of column `H`.

1. The winning number (```Nyertes szám`'') should appear in cell `E2`.

2. The name and email address of the winner (```Nyertes neve`'') should appear in cells `E3` and `G3`, respectively.

In the following tasks you should determine some other values and numbers.

3. In cell `E5` determine the number of *valid* submissions (```Tippek száma`'').

4. By using a function, determine in cell `E6` the number that has been validly submitted the most often (```Leggyakoribb tipp`''). If there are multiple such numbers, give only one instance.

5. By using a function, determine in cells `E7` and `E9` the smallest and the largest valid numbers submitted (```Legkisebb tipp`'' and ```Legnagyobb tipp'`').

6. In cells `E8` and `E10`, respectively, display the player names (```2. tippelője`'') who submitted the smallest and the largest valid numbers for the second time. If there is no second submitter, the message ```nincs`'' (= none) should appear.

7. You should format the sheet according to the *example. *

The spreadsheet (`i353.xls`, `i353.ods`, ...) together with a short documentation (`i353.txt`, `i353.pdf`, ...) describing the name and version number of the spreadsheet application should be submitted in a compressed file (`i353.zip`).