diff options
| author | Gloria Mundi <gloria@gloria-mundi.eu> | 2025-02-13 21:53:53 +0100 |
|---|---|---|
| committer | Gloria Mundi <gloria@gloria-mundi.eu> | 2025-02-13 21:55:17 +0100 |
| commit | 8d707127988c2a96d0e182ba8e1520a2b466fc18 (patch) | |
| tree | f6cd869b1566c8921fd1a36b4370662c2f75b716 /content/graph/dinic.cpp | |
| parent | 85150d345a5b2b32ca6dc11e56ea514d4f34a71a (diff) | |
dinic/capacity scaling: remove dinic.cpp, add comment to dinicScaling.cpp
Diffstat (limited to 'content/graph/dinic.cpp')
| -rw-r--r-- | content/graph/dinic.cpp | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/content/graph/dinic.cpp b/content/graph/dinic.cpp deleted file mode 100644 index c8c34a8..0000000 --- a/content/graph/dinic.cpp +++ /dev/null @@ -1,55 +0,0 @@ -struct Edge { - int to, rev; - ll f, c; -}; - -vector<vector<Edge>> adj; -int s, t; -vector<int> pt, dist; - -void addEdge(int u, int v, ll c) { - adj[u].push_back({v, (int)ssize(adj[v]), 0, c}); - adj[v].push_back({u, (int)ssize(adj[u]) - 1, 0, 0}); -} - -bool bfs() { - dist.assign(ssize(adj), -1); - dist[s] = 0; - queue<int> q({s}); - while (!q.empty() && dist[t] < 0) { - int v = q.front(); q.pop(); - for (Edge& e : adj[v]) { - if (dist[e.to] < 0 && e.c - e.f > 0) { - dist[e.to] = dist[v] + 1; - q.push(e.to); - }}} - return dist[t] >= 0; -} - -ll dfs(int v, ll flow = INF) { - if (v == t || flow == 0) return flow; - for (; pt[v] < ssize(adj[v]); pt[v]++) { - Edge& e = adj[v][pt[v]]; - if (dist[e.to] != dist[v] + 1) continue; - ll cur = dfs(e.to, min(e.c - e.f, flow)); - if (cur > 0) { - e.f += cur; - adj[e.to][e.rev].f -= cur; - return cur; - }} - return 0; -} - -ll maxFlow(int source, int target) { - s = source, t = target; - ll flow = 0; - while (bfs()) { - pt.assign(ssize(adj), 0); - ll cur; - do { - cur = dfs(s); - flow += cur; - } while (cur > 0); - } - return flow; -} |
