# omnimath / omnimath_3365 - taskset: [omnimath](https://harnessreport.com/tasks/omnimath.md) - difficulty: hard - category: math - language: - runnable from the site: no - agent timeout: 600s ## Results by harness _none yet_ ## Instruction ``` # Mathematical Problem Two players, A and B, play a game called "draw the joker card". In the beginning, Player A has $n$ different cards. Player B has $n+1$ cards, $n$ of which are the same with the $n$ cards in Player A's hand, and the rest one is a Joker (different from all other $n$ cards). The rules are i) Player A first draws a card from Player B, and then Player B draws a card from Player A, and then the two players take turns to draw a card from the other player. ii) if the card that one player drew from the other one coincides with one of the cards on his/her own hand, then this player will need to take out these two identical cards and discard them. iii) when there is only one card left (necessarily the Joker), the player who holds that card loses the game. Assume for each draw, the probability of drawing any of the cards from the other player is the same. Which $n$ in the following maximises Player A's chance of winning the game? $n=31$, $n=32$, $n=999$, $n=1000$, For all choices of $n$, A has the same chance of winning ## Instructions Solve the mathematical problem above and write your final answer to `/workspace/answer.txt`. **Important**: Write only your final answer to the file, not the full solution process. ### Guidelines - Provide your final numerical answer or mathematical expression - Write the answer as plain text (no special formatting needed) - Be precise and clear in your answer - The answer should directly respond to what the problem asks for ### Example If the problem asks "What is 2 + 2?", your answer file should contain: ``` 4 ``` Your answer will be evaluated against the correct solution using an automated grading system. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp