#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;
int n;
int G[100001];
vector<int> L[100001];
set<pii> in[100001], out[100001];
int size(int x) {
return L[x].size() + in[x].size() + out[x].size();
}
bool exist(const set<pii> &sp, int g) {
auto it = sp.lower_bound(pii(g, 0));
return it != sp.end() && it->first == g;
}
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
int m;
cin >> n >> m;
for (int i = 1; i <= n; ++i) G[i] = i, L[i].push_back(i);
long long cnt = 0;
while (m--) {
int a, b;
cin >> a >> b;
if (G[a] == G[b] || in[G[b]].count(pii(G[a], a))) {
printf("%lld\n", cnt);
continue;
}
cnt += L[G[b]].size();
in[G[b]].emplace(G[a], a);
out[G[a]].emplace(G[b], a);
vector<pii> V;
if (exist(in[G[a]], G[b])) V.emplace_back(a, b);
while (!V.empty()) {
auto [a, b] = V.back();
V.pop_back();
a = G[a], b = G[b];
if (a == b) continue;
if (size(a) < size(b)) swap(a, b);
int sa = L[a].size(), sb = L[b].size();
cnt += (2ll * sa + int(in[a].size())) * sb;
for (int i : L[b]) {
G[i] = a;
L[a].push_back(i);
}
L[b].clear();
for (auto [g, i] : in[b]) {
out[g].erase(pii(b, i));
if (g == a) {
cnt -= sb;
}
else if (in[a].count(pii(g, i))) {
continue;
}
else {
if (exist(out[a], g)) V.emplace_back(a, g);
cnt += sa;
out[g].emplace(a, i);
in[a].emplace(g, i);
}
}
in[b].clear();
for (auto [g, i] : out[b]) {
in[g].erase(pii(b, i));
if (g == a) {
cnt -= sa + sb;
}
else {
in[g].emplace(a, i);
out[a].emplace(g, i);
}
}
out[b].clear();
}
printf("%lld\n", cnt);
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
12032 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
12032 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
12032 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
