public override void Part1()
{
int lookupWindowSize = 25;
FixedListWrapper <int> lookupWindow = new FixedListWrapper <int>(lookupWindowSize);
for (int lookupIndex = 0; lookupIndex < lookupWindowSize; lookupIndex++)
{
var val = Int32.Parse(Input[lookupIndex]);
lookupWindow.Add(val);
}
for (int checkIndex = lookupWindowSize; checkIndex < Input.Length; checkIndex++)
{
var nextVal = Int32.Parse(Input[checkIndex]);
if (!ValueIsValid(nextVal, lookupWindow))
{
Console.WriteLine($"Found bad value: {nextVal}");
InvalidNumber = nextVal;
return;
}
lookupWindow.Add(nextVal);
}
Console.WriteLine("No bad value found");
}
private bool ValueIsValid(int checkedValue, FixedListWrapper <int> lookupWindow)
{
for (int first = 0; first < lookupWindow.Count - 1; first++)
{
for (int second = first + 1; second < lookupWindow.Count; second++)
{
if (lookupWindow[first] + lookupWindow[second] == checkedValue)
{
return(true);
}
}
}
return(false);
}
