/* -*- coding: utf-8 -*- * * 3200.cc: No.3200 Sinking Islands - yukicoder */ #include #include #include #include using namespace std; /* constant */ const int MAX_N = 200000; const int MAX_M = 200000; /* typedef */ using ll = long long; using pii = pair; struct UFT { vector links, ranks, sizes; UFT() {} void init(int n) { links.resize(n); for (int i = 0; i < n; i++) links[i] = i; ranks.assign(n, 1); sizes.assign(n, 1); } int root(int i) { int i0 = i; while (links[i0] != i0) i0 = links[i0]; return (links[i] = i0); } int rank(int i) { return ranks[root(i)]; } int size(int i) { return sizes[root(i)]; } bool same(int i, int j) { return root(i) == root(j); } int merge(int i0, int i1) { int r0 = root(i0), r1 = root(i1), mr; if (r0 == r1) return r0; if (ranks[r0] == ranks[r1]) { links[r1] = r0; sizes[r0] += sizes[r1]; ranks[r0]++; mr = r0; } else if (ranks[r0] > ranks[r1]) { links[r1] = r0; sizes[r0] += sizes[r1]; mr = r0; } else { links[r0] = r1; sizes[r1] += sizes[r0]; mr = r1; } return mr; } }; /* global variables */ pii es[MAX_M]; int bs[MAX_M]; bool used[MAX_M]; UFT uft; ll res[MAX_M]; /* subroutines */ inline ll nc2(int n) { return (ll)n * (n - 1) / 2; } /* main */ int main() { int n, m; scanf("%d%d", &n, &m); for (int i = 0; i < m; i++) { int u, v; scanf("%d%d", &u, &v); u--, v--; es[i] = {u, v}; } int qn; scanf("%d", &qn); for (int i = 0; i < qn; i++) scanf("%d", bs + i), bs[i]--, used[bs[i]] = true; uft.init(n); for (int i = 0; i < m; i++) if (! used[i]) uft.merge(es[i].first, es[i].second); ll sum = 0; for (int u = 0; u < n; u++) if (uft.root(u) == u) { //printf(" size(%d)=%d\n", u, uft.size(u)); sum += nc2(uft.size(u)); } //printf(" sum=%lld\n", sum); for (int i = qn - 1; i >= 0; i--) { res[i] = nc2(n) - sum; auto [u, v] = es[bs[i]]; if (! uft.same(u, v)) { int usz = uft.size(u), vsz = uft.size(v); sum += nc2(usz + vsz) - (nc2(usz) + nc2(vsz)); uft.merge(u, v); } } for (int i = 0; i < qn; i++) printf("%lld\n", res[i]); return 0; }