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| #include <bits/stdc++.h>
using namespace std;
struct DSU {
vector<int> a, b;
vector<int> p;
DSU(int n, int m)
{
a.resize(n + m, 0);
b.resize(n + m, 0);
p.resize(n + m, -1);
for (int i = 0; i < n; i++)
{
a[i] = 1;
}
for (int i = n; i < n + m; i++)
{
b[i] = 1;
}
}
int root(int x)
{
if (p[x] == -1)
{
return x;
} else {
p[x] = root(p[x]);
return p[x];
}
}
bool connect(int x, int y)
{
return root(x) == root(y);
}
int get_a(int x)
{
return a[root(x)];
}
int get_b(int x)
{
return b[root(x)];
}
void to_union(int x, int y)
{
int px = root(x);
int py = root(y);
p[px] = py;
a[py] += a[px];
b[py] += b[px];
}
};
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n, m, e;
cin >> n >> m >> e;
vector<int> u(e), v(e);
for (int i = 0; i < e; i++)
{
cin >> u[i] >> v[i];
u[i]--;
v[i]--;
}
int q;
cin >> q;
vector<int> x(q);
vector<bool> ok(e, true);
for (int i = 0; i < q; i++)
{
cin >> x[i];
x[i]--;
ok[x[i]] = false;
}
DSU dsu(n, m);
int cnt = 0;
for (int i = 0; i < e; i++)
{
if (ok[i])
{
if (!dsu.connect(u[i], v[i]))
{
int ua = dsu.get_a(u[i]);
int va = dsu.get_a(v[i]);
int ub = dsu.get_b(u[i]);
int vb = dsu.get_b(v[i]);
if (ub > 0 && vb == 0)
{
cnt += va;
}
if (ub == 0 && vb > 0)
{
cnt += ua;
}
dsu.to_union(u[i], v[i]);
}
}
}
vector<int> ans(q);
for (int i = q - 1; i >= 0; i--)
{
ans[i] = cnt;
if (!dsu.connect(u[x[i]], v[x[i]]))
{
int ua = dsu.get_a(u[x[i]]);
int va = dsu.get_a(v[x[i]]);
int ub = dsu.get_b(u[x[i]]);
int vb = dsu.get_b(v[x[i]]);
if (ub > 0 && vb == 0){
cnt += va;
}
if (vb > 0 && ub == 0){
cnt += ua;
}
dsu.to_union(u[x[i]], v[x[i]]);
}
}
for (auto & num : ans)
{
cout << num << endl;
}
return 0;
}
|
