public override object SolvePartOne()
{
var count = 0;
foreach (var line in Lines)
{
var minOccurence = PasswordParser.ParseLowerBound(line);
var maxOccurence = PasswordParser.ParseUpperBound(line);
var character = PasswordParser.ParseCharacter(line);
var password = PasswordParser.ParsePassword(line);
var occurence = 0;
foreach (var ch in password)
{
if (character == ch)
{
occurence++;
}
}
if (minOccurence <= occurence && occurence <= maxOccurence)
{
count++;
}
}
return(count);
}
public void Test_DayTwoPartOneExample()
{
var input = "1-3 a: abcde\n" +
"1-3 b: cdefg\n" +
"2-9 c: ccccccccc\n";
var passwords = PasswordParser.Parse(input).ToList();
Assert.AreEqual(3, passwords.Count());
Assert.IsTrue(passwords[0].IsValidCharCount);
Assert.IsFalse(passwords[1].IsValidCharCount);
Assert.IsTrue(passwords[2].IsValidCharCount);
Assert.AreEqual(2, passwords.Count(p => p.IsValidCharCount));
}
public void ParseLowerBoundTest()
{
//Given
var line1 = "1-3 c: abcde";
var line2 = "1-3 b: 2-5 7-9";
var line3 = "13-9 c: ";
//When
var lowerBound1 = PasswordParser.ParseLowerBound(line1);
var lowerBound2 = PasswordParser.ParseLowerBound(line2);
var lowerBound3 = PasswordParser.ParseLowerBound(line3);
//Then
Assert.Equal(1, lowerBound1);
Assert.Equal(1, lowerBound2);
Assert.Equal(13, lowerBound3);
}
public void ParsePasswordTest()
{
//Given
var line1 = "1-3 c: abcde";
var line2 = "1-3 b: 2-5 7-9";
var line3 = "13-9 c: ";
//When
var pass1 = PasswordParser.ParsePassword(line1);
var pass2 = PasswordParser.ParsePassword(line2);
var pass3 = PasswordParser.ParsePassword(line3);
//Then
Assert.Equal("abcde", pass1);
Assert.Equal("2-5 7-9", pass2);
Assert.Equal("", pass3);
}
public void ParseCharTest()
{
//Given
var line1 = "1-3 c: abcde";
var line2 = "1-3 b: 2-5 7-9";
var line3 = "13-9 c: ";
//When
var char1 = PasswordParser.ParseCharacter(line1);
var char2 = PasswordParser.ParseCharacter(line2);
var char3 = PasswordParser.ParseCharacter(line3);
//Then
Assert.Equal('c', char1);
Assert.Equal('b', char2);
Assert.Equal('c', char3);
}
public override object SolvePartTwo()
{
var count = 0;
foreach (var line in Lines)
{
var pos1 = PasswordParser.ParseLowerBound(line);
var pos2 = PasswordParser.ParseUpperBound(line);
var character = PasswordParser.ParseCharacter(line);
var password = PasswordParser.ParsePassword(line);
var ch1 = password[pos1 - 1];
var ch2 = password[pos2 - 1];
if ((ch1 == character) ^ (ch2 == character))
{
count++;
}
}
return(count);
}
public Day02() : base(02, 2020, "Password Philosophy")
{
Passwords = PasswordParser.Parse(Input);
}
