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authorGloria Mundi <gloria@gloria-mundi.eu>2024-11-16 15:39:23 +0100
committerGloria Mundi <gloria@gloria-mundi.eu>2024-11-16 15:39:23 +0100
commit72bd993483453ed8ebc462f1a33385cd355d486f (patch)
treec5592ba1ed2fed79e26ba6158d097c9ceb43f061 /content/graph/scc.cpp
parent98567ec798aa8ca2cfbcb85c774dd470f30e30d4 (diff)
parent35d485bcf6a9ed0a9542628ce4aa94a3326d0884 (diff)
merge mzuenni changes
Diffstat (limited to 'content/graph/scc.cpp')
-rw-r--r--content/graph/scc.cpp19
1 files changed, 10 insertions, 9 deletions
diff --git a/content/graph/scc.cpp b/content/graph/scc.cpp
index ac9a40b..32f1099 100644
--- a/content/graph/scc.cpp
+++ b/content/graph/scc.cpp
@@ -1,11 +1,12 @@
-vector<vector<int>> adj, sccs;
-int counter;
+vector<vector<int>> adj;
+int counter, sccCounter;
vector<bool> inStack;
vector<int> low, idx, s; //idx enthält Index der SCC pro Knoten.
void visit(int v) {
int old = low[v] = counter++;
- s.push_back(v); inStack[v] = true;
+ s.push_back(v);
+ inStack[v] = true;
for (auto u : adj[v]) {
if (low[u] < 0) visit(u);
@@ -13,20 +14,20 @@ void visit(int v) {
}
if (old == low[v]) {
- sccs.push_back({});
+ sccCounter++;
for (int u = -1; u != v;) {
- u = s.back(); s.pop_back(); inStack[u] = false;
- idx[u] = sz(sccs) - 1;
- sccs.back().push_back(u);
+ u = s.back();
+ s.pop_back();
+ inStack[u] = false;
+ idx[u] = sccCounter - 1;
}}}
void scc() {
inStack.assign(sz(adj), false);
low.assign(sz(adj), -1);
idx.assign(sz(adj), -1);
- sccs.clear();
- counter = 0;
+ counter = sccCounter = 0;
for (int i = 0; i < sz(adj); i++) {
if (low[i] < 0) visit(i);
}}