拍了一个傻逼MCMF模板，求各路大佬批判

Algorithms/Graph/NetworkFlow/MCMF.cpp

@@ -0,0 +1,73 @@
+#include <cstdio>
+#include <cstring>
+inline int abs(int x) { return x < 0 ? -x : x; }
+inline int min(int a, int b) { return a < b ? a : b; }
+const int inf = 0x3f3f3f3f, maxn = 210, maxm = maxn * maxn;
+int head[maxn], next[maxm], to[maxm], cap[maxm], cost[maxm], ecnt;
+int dis[maxn], fa[maxn], que[maxm], cur[maxn];
+bool inq[maxn];
+inline void addEdge_impl_(int f, int t, int c, int v)
+{
+    next[ecnt] = head[f];
+    head[f] = ecnt;
+    to[ecnt] = t;
+    cap[ecnt] = c;
+    cost[ecnt] = v;
+    ecnt++;
+}
+inline void addEdge(int f, int t, int c, int v)
+{
+    addEdge_impl_(f, t, c, v);
+    addEdge_impl_(t, f, 0, -v);
+}
+bool MCMF(int s, int e, int &c, int &v)
+{
+    memset(inq, 0, sizeof(inq));
+    memset(dis, inf, sizeof(dis));
+    int h = 0, t = 0, x;
+    cur[s] = inf;
+    inq[s] = true;
+    que[t++] = s;
+    dis[s] = 0;
+    for (; h != t; inq[que[h++]] = false)
+        for (int i = head[x = que[h]]; ~i; i = next[i])
+            if (cap[i] > 0 && dis[to[i]] > dis[x] + cost[i])
+            {
+                dis[to[i]] = dis[x] + cost[i];
+                cur[to[i]] = min(cap[i], cur[x]);
+                fa[to[i]] = i;
+                if (!inq[to[i]]) inq[que[t++] = to[i]] = true;
+            }
+    if (dis[e] == inf) return false;
+    c += cur[e], v += cur[e] * dis[e];
+    for (int i = e; i != s; i = to[fa[i] ^ 1])
+        cap[fa[i]] -= cur[e], cap[fa[i] ^ 1] += cur[e];
+    return true;
+}
+int M[maxn][2], mcnt, H[maxn][2], hcnt;
+char buf[maxn];
+int main()
+{
+    int n, m;
+    while (~scanf("%d%d\n", &n, &m))
+    {
+        if (n == 0 && m == 0) break;
+        memset(head, -1, sizeof(head));
+        ecnt = mcnt = hcnt = 0;
+        for (int i = 0, j; i < n; i++)
+            for (j = 0, fgets(buf, 111, stdin); j < m; j++)
+            {
+                if (buf[j] == 'm') mcnt++, M[mcnt][0] = i, M[mcnt][1] = j;
+                if (buf[j] == 'H') hcnt++, H[hcnt][0] = i, H[hcnt][1] = j;
+            }
+        int S = 0, T = mcnt + hcnt + 2, C = 0, F = 0;
+        for (int i = 1; i <= mcnt; i++) addEdge(S, i, 1, 0);
+        for (int i = 1; i <= hcnt; i++) addEdge(mcnt + i, T, 1, 0);
+        for (int i = 1; i <= mcnt; i++)
+            for (int j = 1; j <= hcnt; j++)
+                addEdge(i, mcnt + j, 1, abs(M[i][0] - H[j][0]) + abs(M[i][1] - H[j][1]));
+        while (MCMF(S, T, F, C));
+        printf("%d\n", C);
+    }
+    return 0;
+}