Try different search strategy in AoC 22 Day 16

[iglesias]

aoc_22_day_16_valves.cpp

The team_search is using a state with two minute marks and valve positions, and so the search moves the two players simultaneously. Even though the two players use their own minute, my intuition expects that states will contain players with similar minutes, since the state expansion makes a move for all two players.

A different search strategy consists in searching for each player iteratively. So, I would start with the, say, 26 minutes of player 1 and then, when the search has finished for a single player, it would continue with the next player starting her or his own minute count. Of course valves chosen by a previous player cannot be reopened for the next one.