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BinaryGap.cs
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BinaryGap.cs
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
public class Solution
{
public static void Main(string[] args)
{
}
public static int solution(int N)
{
string binaryRepresentation = Convert.ToString(N, 2);
// search max binary gap
int longestBinaryGap = 0;
int binaryGapLenght = 0;
for (int i = 1; i < binaryRepresentation.Length; i++)
{
if (binaryRepresentation[i-1] == '1' && binaryRepresentation[i] == '0')
{
binaryGapLenght = 1;
}
else if (binaryRepresentation[i - 1] == '0' && binaryRepresentation[i] == '0')
{
binaryGapLenght++;
}
else if (binaryRepresentation[i - 1] == '0' && binaryRepresentation[i] == '1')
{
longestBinaryGap = Math.Max(longestBinaryGap, binaryGapLenght);
}
}
return longestBinaryGap;
}
}
// tests
[TestMethod]
public void TestSolution()
{
Assert.AreEqual(Solution.solution(9), 2);
Assert.AreEqual(Solution.solution(2), 0);
Assert.AreEqual(Solution.solution(5), 1);
Assert.AreEqual(Solution.solution(1041), 5);
Assert.AreEqual(Solution.solution(0), 0);
Assert.AreEqual(Solution.solution(511), 0);
Assert.AreEqual(Solution.solution(126), 0);
Assert.AreEqual(Solution.solution(12320), 6);
}