static void Main(string[] args)
{
var root = @"D:\gcj\p1\";
string[] input = System.IO.File.ReadAllLines(root + "small.txt");
StreamWriter output = new StreamWriter(root + "out.txt");
long numCases = Int32.Parse(input[0]);
int ln = 1;
for (long nc = 0; nc < numCases; ++nc)
{
int[] data = input[ln].Split(' ').Select(y => int.Parse(y)).ToArray();
ln++;
int N = data[0];
int L = data[1];
string[] flows = input[ln].Split(' ').ToArray();
ln++;
string[] outlets = input[ln].Split(' ').ToArray();
ln++;
bool[,] f = new bool[N, L];
ulong[] fs = new ulong[N];
bool[,] o = new bool[N, L];
for (int i = 0; i < N; ++i)
{
for (int j = 0; j < L; ++j)
{
f[i, j] = flows[i][j] == '1';
o[i, j] = outlets[i][j] == '1';
if (flows[i][j] == '1')
{
fs[i] = fs[i] | (ulong)(1 << j);
}
}
}
HashSet <ulong> vals = new HashSet <ulong>(fs.AsEnumerable());
HashSet <ulong> vals2 = new HashSet <ulong>();
int minSeen = 600000;
bool[] flips = new bool[L];
for (int i = 0; i < N; ++i)
{
for (int j = 0; j < N; ++j)
{
int curFlip = 0;
for (int k = 0; k < L; ++k)
{
if (f[i, k] != o[j, k])
{
flips[k] = true;
curFlip++;
}
else
{
flips[k] = false;
}
}
ulong[] os = new ulong[N];
for (int k = 0; k < N; ++k)
{
for (int z = 0; z < L; ++z)
{
if (flips[z] != o[k, z])
{
os[k] = os[k] | (ulong)(1 << z);
}
}
}
vals2.Clear();
foreach (var v in os)
{
vals2.Add(v);
}
bool good = true;
foreach (var v in vals)
{
if (!vals2.Contains(v))
{
good = false;
break;
}
}
if (good && curFlip < minSeen)
{
minSeen = curFlip;
}
}
}
output.WriteLine("Case #{0}: {1}", nc + 1, minSeen == 600000 ? "NOT POSSIBLE" : minSeen.ToString());
Console.WriteLine("Case #{0}: {1}", nc + 1, minSeen == 600000 ? "NOT POSSIBLE" : minSeen.ToString());
}
output.Close();
string readOut = File.ReadAllText(root + "out.txt");
string pOut = File.ReadAllText(root + "outP.txt");
if (readOut.Equals(pOut))
{
Console.WriteLine("Match found");
}
else
{
Console.WriteLine("Match not found");
Console.WriteLine("v1 is: {0}\nv2 is: {1}", readOut, pOut);
}
}