public static int Flip(int num)
{
// 11011101111
bool bitFlippped = false;
int start = 0;
int end = start;
int longestLength = 0;
int lastOffBitIndex = 0;
for (int i = 0; i < 32; i++)
{
bool curBit = BitDriver.Getbit(num, i);
if (curBit)
{
end++;
}
else
{
if (!bitFlippped)
{
bitFlippped = true;
lastOffBitIndex = i;
end++;
}
else
{
int length = end - start;
if (length > longestLength)
{
longestLength = length;
}
i = lastOffBitIndex + 1;
start = i;
end = start;
bitFlippped = false;
}
}
}
return(longestLength);
}
private static int FlipPairwise(int num)
{
int a = num;
int index = 0;
while (a != 0)
{
bool x = (a & 1) == 1;
bool y = (a & 2) == 2;
if (x != y)
{
num = BitDriver.Updatebit(num, index, y);
num = BitDriver.Updatebit(num, index + 1, x);
}
a = a >> 2;
index += 2;
}
return(num);
}