Struct State 

struct State {
    todo: usize,
    from: usize,
    time: u32,
    pressure: u32,
}

State of a single exploration path through the valves.

• todo Binary mask of unopened valves. For example, if there are 3 unopened valves left this could look like 11100.
• from Index of current valve.
• time The remaining time left.
• pressure Total pressure released from all opened valves including future extrapolated flow.

Fields

todo: usize

from: usize

time: u32

pressure: u32