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Fixed a few things in lca.cpp

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This commit is contained in:
Anthony Wang 2020-09-06 10:59:36 -05:00
parent fc0be86143
commit dcb2b2d376
1 changed files with 3 additions and 3 deletions
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6
Graph/lca.cpp
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@ -7,12 +7,12 @@ namespace lca {
}
int lca(vector<int> * G, int u, int v) {
if (d[u] > d[v]) swap(u, v);
for (int i = 18; i >= 0; i--) if (d[v] - (1 << i) >= d[u]) v = L[v][i];
for (int i = 18; i >= 0; --i) if (d[v] - (1 << i) >= d[u]) v = L[v][i];
if (u == v) return u;
for (int i = 18; i >= 0; i--) if (L[u][i] && L[u][i] != L[v][i]) u = L[u][i], v = L[v][i];
for (int i = 18; i >= 0; --i) if (L[u][i] && L[u][i] != L[v][i]) u = L[u][i], v = L[v][i];
return L[u][0];
}
inline int dist(vector<int> * G, int u, int v) {
return d[u]+d[v]-2*lca(G, u, v);
return d[u]+d[v]-2*d[lca(G, u, v)];
}
}