public bool CanMeasureWater2(int x, int y, int z)
{
if (x + y < z)
{
return(false);
}
if (x > y)
{
int tmp = x;
x = y;
y = tmp;
}
var states = new Queue <JugState>();
var visited = new HashSet <JugState>();
// initial state
var init = new JugState(0, 0);
states.Enqueue(init);
visited.Add(init);
while (states.Count != 0)
{
JugState curr = states.Dequeue();
// fill jug1
var temp = new List <JugState>();
temp.Add(new JugState(x, curr.b)); // fill jug 1
temp.Add(new JugState(0, curr.b)); // empty jug1
temp.Add(new JugState(curr.a, y)); // fill jug 2
temp.Add(new JugState(curr.a, 0)); // empty jug2
temp.Add(new JugState(Math.Min(curr.a + curr.b, x),
curr.a + curr.b < x ? 0 : curr.b - (x - curr.a))); // pour all water from jug2 to jug1 x
temp.Add(new JugState(curr.a + curr.b < y ? 0 : curr.a - (y - curr.b),
Math.Min(curr.a + curr.b, y))); // pour all water from jug1 to jug2 y
foreach (JugState tmp in temp)
{
if (visited.Contains(tmp))
{
continue;
}
if (curr.a + curr.b == z)
{
return(true);
}
states.Enqueue(tmp);
visited.Add(tmp);
}
}
return(false);
}
public override bool Equals(object obj)
{
JugState other = (JugState)obj;
return(this.a == other.a && this.b == other.b);
}
