public static int Solve(IEnumerable <string> passwords)
{
var lines = PasswordLine.LinesFrom(passwords);
return(lines.Count(x => x.Password[x.PolicyRuleInt1 - 1] == x.Character ^
x.Password[x.PolicyRuleInt2 - 1] == x.Character));
}
public static int Solve(IEnumerable <string> passwords)
{
var lines = PasswordLine.LinesFrom(passwords);
return(lines.Count(x =>
{
var characterCount = x.Password.Count(y => y == x.Character);
return characterCount >= x.PolicyRuleInt1 && characterCount <= x.PolicyRuleInt2;
}));
}