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Fix maxflow speedup #117

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Fix maxflow speedup #117

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2 changes: 2 additions & 0 deletions ch8/maxflow.java
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Original file line number Diff line number Diff line change
Expand Up @@ -154,10 +154,12 @@ long DFS(int u, int t, long f) { // traverse from s->t
int start = last[u];
int stop = AL.get(u).size();
for (int i = start; i < stop; i++) { // from last edge
last[u] = i;
Edge e = EL[AL.get(u).get(i)];
int v = e.v;
long cap = e.w;
long flow = e.f;

if (d[v] != d[u] + 1) continue; // not part of layer graph
long pushed;
if ((pushed = DFS(v, t, Math.min(f, cap - flow))) > 0) {
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