With pleasure.

The following is an alternative C++17 solution using queue< int > to store the cards that each player holds.

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Best wishes,

The following is yet another alternative C++17 solution. Instead of using queue< int > to store the cards that each player holds, the card numbers between 1 and 10 are decremented by one to be between 0 and 9. A long long state member of each player is then used to store the present cards held by the player as the decimal digits of the variable. Adding/removing a card is implemented using a simple decimal number arithmetic.

To check for the presence of cycles in the test case, the initial state before each fight is stored in an STL set. The fight continues until either the number of cards that one of the players holds is 0 or the new state after the fight is found in the set of previous states.

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The following is another alternative C++17 solution using a nested STL map to store the visited states, and a two-dimensional dp[x][count] array that stores the increment to be added to the present state when card number x is added to player who holds count cards.

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