int main()
{
while (scanf("%d", &n) != EOF)
{
gg.init(n + 3);
int supernode = n;
int source = n + 1;
int dest = source + 1;
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
scanf("%d", C[i] + j);
if (i != j)
{
gg.add(i, j, 1, C[i][j]);
}
}
}
for (int i = 1; i < n; i++)
{
gg.add(i, supernode, 1, C[i][0]);
gg.add(supernode, i - 1, 1, C[n - 1][i - 1]);
}
gg.add(source, 0, 1, 0);
gg.add(n - 1, dest, 1, 0);
printf("%d\n",gg.MF(source, dest));
}
}
int main()
{
int n, m;
ios::sync_with_stdio(false);
while(cin >> n >> m)
{
MCMF MF;
if (n == 0 && m == 0)
{
break;
}
int S = n * m + 1;
int T = S + 1;
int tot = T + 1;
MF.init(tot);
for (int i = 0; i < n; i++)
{
cin >> grid[i];
for(int j = 0; j < m; j++)
{
if (grid[i][j] == 'm')
{
MF.add(S, i * m + j + 1, 1, 0);
// cout <<"m ";
}
else if (grid[i][j] == 'H')
{
MF.add(i * m + j+1, T, 1, 0);
// cout <<"eiwgo";
}
for (int d = 0; d < 4; d++)
{
int tx = i + dx[d];
int ty = j + dy[d];
if (tx >= 0 && tx < n && ty >= 0 && ty < m)
{
MF.add(i * m + j+1, tx * m + ty+1, inf,1);
//cout <<"addege";
}
}
}
}
cout << MF.mincost(S, T) << endl;
}
}
int main() {
int n, m;
while(scanf("%d%d", &n, &m) == 2 && n) {
g.init(n+m+2);
for(int i = 1; i <= n; i++)
for(int j = 1; j <= m; j++) {
double d;
scanf("%lf", &d);
g.AddEdge(j, m+i, 1, d);
}
for(int i = 1; i <= m; i++) g.AddEdge(0, i, 1, 0);
for(int i = 1; i <= n; i++) g.AddEdge(m+i, m+n+1, 1, 0);
double cost;
int flow = g.MincostMaxflow(0, m+n+1, cost);
printf("%.2lf\n", cost / n + 1e-8);
}
return 0;
}
int main() {
int n, a, b, v, kase = 0;
while(scanf("%d%d%d", &n, &a, &b) == 3) {
g.init(n+2);
for(int u = 0; u < n; u++) {
scanf("%d%d", &x[u], &y[u]);
G[u].clear();
for(;;) {
scanf("%d", &v);
if(v == 0) break;
G[u].push_back(v-1);
}
}
memset(c1, 0, sizeof(c1));
memset(c2, 0, sizeof(c2));
double sum = 0;
for(int u = 0; u < n; u++) {
for(int i = 0; i < G[u].size(); i++) {
int v = G[u][i];
double d = sqrt((x[u] - x[v])*(x[u] - x[v]) + (y[u] - y[v])*(y[u] - y[v]));
double edge_cost = -d*a+b; // minimize sum{edge_cost}
if(edge_cost >= 0) {
g.AddEdge(u, v, 1, edge_cost);
} else {
g.AddEdge(v, u, 1, -edge_cost);
c1[v]++; c2[u]++;
sum += -edge_cost;
}
}
}
for(int u = 0; u < n; u++) {
if(c1[u] > c2[u]) g.AddEdge(n, u, c1[u]-c2[u], 0);
if(c2[u] > c1[u]) g.AddEdge(u, n+1, c2[u]-c1[u], 0);
}
double cost;
int flow = g.MincostMaxflow(n, n+1, cost);
double ans = sum - cost;
if(ans < 0) ans = 0; // avoid -0.0
printf("Case %d: %.2lf\n", ++kase, ans);
}
return 0;
}
int main() {
int n, m, a, b, c;
while(scanf("%d%d", &n, &m) == 2 && n) {
g.init(n*2-2);
// 点2~n-1拆成弧i->i'，前者编号为0~n-1，后者编号为n~2n-3
for(int i = 2; i <= n-1; i++)
g.AddEdge(i-1, i+n-2, 1, 0);
while(m--) {
scanf("%d%d%d", &a, &b, &c);
// 连a'->b
if(a != 1 && a != n) a += n-2; else a--;
b--;
g.AddEdge(a, b, 1, c);
}
int cost;
g.MincostFlow(0, n-1, 2, cost);
printf("%d\n", cost);
}
return 0;
}
