public long ExecutePartOne(string inputFile, int index = 25)
{
var input = ArraysAndLists.StringArrayToLongArray(General.GetDataFromInputFileAsStringArray(inputFile));
var currentIndex = index; // skip first
long checkingNumber;
foreach (var line in input.Skip(index))
{
var foundSum = false;
checkingNumber = line;
var preamble = input.Skip(currentIndex - index).Take(index);
foreach (var calc in preamble.Distinct())
{
var lookForNumber = checkingNumber - calc;
if (preamble.Any(x => x == lookForNumber))
{
foundSum = true;
break;
}
;
}
if (!foundSum)
{
return(checkingNumber);
}
currentIndex++;
}
return(0);
}
public void ReverseString_ReverseGivenString_ReturnReversedString()
{
var reverse = new ArraysAndLists();
var result = reverse.ReverseString("Pomarancza");
Assert.That(result, Does.Contain("azcnaramoP"));
}
public long ExecutePartTwo(string inputFile, int index = 25)
{
var input = ArraysAndLists.StringArrayToLongArray(General.GetDataFromInputFileAsStringArray(inputFile));
var lookForNumber = ExecutePartOne(inputFile, index);
var validNumbers = input.Where(x => x < lookForNumber).Reverse();
for (int from = 0; from < validNumbers.Count(); from++)
{
var numberOfRecords = 1;
var list = validNumbers.Skip(from);
do
{
var sum = list.Take(numberOfRecords).Sum();
if (sum == lookForNumber)
{
return(list.Take(numberOfRecords).Min() + list.Take(numberOfRecords).Max());
}
else if (sum > lookForNumber)
{
break;
}
numberOfRecords++;
}while (numberOfRecords + from < validNumbers.Count());
}
return(0);
}
public void SixThFacebook_WhenNoOneLikePost_ReturnsNothing()
{
List <string> list = new List <string>();
var facebook = new ArraysAndLists();
var result = facebook.Facebook(list);
Assert.That(result, Does.Contain(""));
}
public void SixThFacebook_WhenTwoAndMoreFriendLikePost_ReturnNamesNumOfOthersLikeYourPost()
{
List <string> list = new List <string> {
"Tom", "Jerry", "Ben", "Kate"
};
var facebook = new ArraysAndLists();
var result = facebook.Facebook(list);
Assert.That(result, Does.Contain(String.Format("{0}, {1} and {2} others like your post.", list[0], list[1], list.Count - 2)));
}
public void SixThFacebook_WhenOnlyTwoFriendLikePost_ReturnNamesLikeYourPost()
{
List <string> list = new List <string> {
"Tom", "Jerry"
};
var facebook = new ArraysAndLists();
var result = facebook.Facebook(list);
Assert.That(result, Does.Contain(String.Format("{0} and {1} like your post.", list[0], list[1])));
}
public void SixThFacebook_WhenOnlyOneFriendLikePost_ReturnNameLikesYourPost()
{
List <string> list = new List <string> {
"Tom"
};
var facebook = new ArraysAndLists();
var result = facebook.Facebook(list);
Assert.That(result, Does.Contain(String.Format("{0} likes your post.", list[0])));
}
public static int ExecutePartTwo(string inputFile)
{
var input = Helpers.General.GetDataFromInputFileAsStringArray(inputFile);
var array = ArraysAndLists.StringArrayToIntArray(input);
foreach (int current in array)
{
var smallerList = array.Where(x => x <= 2020 - current).Select(x => x);
foreach (int i in smallerList)
{
var smallestList = array.Where(x => x <= 2020 - current - i).Select(x => x);
foreach (int j in smallestList)
{
if (current + i + j == 2020)
{
return(current * i * j);
}
}
}
}
return(0);
}
