public static void Solve()
{
var(N, M) = Scanner.Scan <int, int>();
var G = new string[N];
for (var i = 0; i < N; i++)
{
G[i] = Scanner.Scan <string>();
}
var mcfg = new MinCostFlowGraph(N * M + 2);
var s = N * M;
var t = N * M + 1;
var sum = 0;
const int Inf = (int)1e9;
for (var i = 0; i < N; i++)
{
for (var j = 0; j < M; j++)
{
if (G[i][j] == '#')
{
continue;
}
var dist = N - i + M - j;
if (G[i][j] == 'o')
{
mcfg.AddEdge(s, i * M + j, 1, 0);
sum += dist;
}
mcfg.AddEdge(i * M + j, t, 1, dist);
if (i + 1 < N && G[i + 1][j] != '#')
{
mcfg.AddEdge(i * M + j, (i + 1) * M + j, Inf, 0);
}
if (j + 1 < M && G[i][j + 1] != '#')
{
mcfg.AddEdge(i * M + j, i * M + (j + 1), Inf, 0);
}
}
}
var answer = sum - mcfg.Flow(s, t, Inf).Item2;
Console.WriteLine(answer);
}
public static void Solve()
{
var(N, K) = Scanner.Scan <int, int>();
var A = new long[N][].Select(x => Scanner.ScanEnumerable <long>().ToArray()).ToArray();
var mcfg = new MinCostFlowGraph(N * 2 + 2);
var s = N * 2;
var t = N * 2 + 1;
var inf = (long)1e9;
mcfg.AddEdge(s, t, N * K, inf);
for (var i = 0; i < N; i++)
{
mcfg.AddEdge(s, i, K, 0);
mcfg.AddEdge(N + i, t, K, 0);
}
for (var i = 0; i < N; i++)
{
for (var j = 0; j < N; j++)
{
mcfg.AddEdge(i, N + j, 1, inf - A[i][j]);
}
}
var result = mcfg.FlowOf(s, t, N * K);
Console.WriteLine(inf * N * K - result.Item2);
var G = new char[N][].Select(x => Enumerable.Repeat('.', N).ToArray()).ToArray();
foreach (var edge in mcfg.GetEdges().Where(x => x.From != s && x.To != t && x.Flow != 0))
{
G[edge.From][edge.To - N] = 'X';
}
Console.WriteLine(string.Join("\n", G.Select(x => new string(x))));
}