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1098. [POI2007]办公楼biu

https://hydro.ac/d/bzoj/record/6322c18cbdf9bc31d1607532
This commit is contained in:
Baoshuo Ren 2022-09-15 14:09:21 +08:00
parent 4a3a25865d
commit 8f07b5e70f
Signed by: baoshuo
GPG Key ID: 00CB9680AB29F51A
31 changed files with 171 additions and 0 deletions

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#include <iostream>
#include <algorithm>
#include <queue>
#include <set>
#include <vector>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 1e5 + 5;
int n, m, cnt, ans[N];
std::vector<int> g[N];
std::set<int> set;
bool vis[N];
void bfs(int x) {
std::queue<int> q;
set.erase(x);
q.push(x);
ans[cnt]++;
while (!q.empty()) {
int u = q.front();
q.pop();
vis[u] = true;
for (auto it = set.begin(); it != set.end();) {
int v = *it;
if (*std::lower_bound(g[u].begin(), g[u].end(), v) != v) {
q.push(v);
ans[cnt]++;
set.erase(it++);
} else {
it++;
}
}
}
}
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m;
for (int i = 1, u, v; i <= m; i++) {
cin >> u >> v;
g[u].push_back(v);
g[v].push_back(u);
}
std::for_each(g + 1, g + n + 1, [&](auto& v) { std::sort(v.begin(), v.end()); });
for (int i = 1; i <= n; i++) {
set.insert(i);
}
for (int i = 1; i <= n; i++) {
if (!vis[i]) {
cnt++;
bfs(i);
}
}
std::sort(ans + 1, ans + 1 + cnt);
cout << cnt << endl;
for (int i = 1; i <= cnt; i++) {
cout << ans[i] << ' ';
}
cout << endl;
return 0;
}

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