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using System; | |
using System.Linq; | |
namespace _4Phil | |
{ | |
class Program | |
{ | |
static void Main(string[] args) | |
{ | |
Console.WriteLine("Testing algorithm..."); | |
Console.WriteLine(NumberOfACharAdditions("baaa")); | |
Console.WriteLine(NumberOfACharAdditions("aa")); | |
Console.WriteLine(NumberOfACharAdditions("dog")); | |
Console.WriteLine(NumberOfACharAdditions("aabab")); | |
} | |
static private int NumberOfACharAdditions(string aString) | |
{ | |
// Fail fast | |
if ("aa" == aString) | |
{ | |
return 0; | |
} | |
if (aString.Contains("aaa")) | |
{ | |
return -1; | |
} | |
// Return the number of a additions | |
int numberOfNonAChars = aString.Count(c => (c != 'a')); | |
int numberOfAChars = aString.Count(c => (c == 'a')); | |
return ((numberOfNonAChars * 2) + 2) - numberOfAChars; | |
} | |
} | |
} |
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