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67
NFLSOJ/0/3692/3692.cpp
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67
NFLSOJ/0/3692/3692.cpp
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#include <iostream>
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#include <algorithm>
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#include <fstream>
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#include <queue>
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#include <vector>
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// using std::cin;
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// using std::cout;
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std::ifstream cin("graph.in");
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std::ofstream cout("graph.out");
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const char endl = '\n';
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const int N = 1e5 + 5;
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int n, m, d[N], ans;
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std::vector<int> g[N];
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std::priority_queue<std::pair<int, int>, std::vector<std::pair<int, int>>, std::greater<>> q;
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bool vis[N];
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> n >> m;
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for (int i = 1, x, y; i <= m; ++i) {
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cin >> x >> y;
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g[x].emplace_back(y);
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g[y].emplace_back(x);
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d[x]++, d[y]++;
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}
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ans = *std::min_element(d + 1, d + 1 + n);
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for (int i = 1; i <= n; i++) {
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q.emplace(d[i], i);
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}
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while (!q.empty()) {
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auto o = q.top();
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q.pop();
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while (!q.empty() && o.first != d[o.second]) {
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o = q.top();
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q.pop();
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}
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if (!q.empty()) {
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vis[o.second] = true;
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d[o.second] = 0;
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ans = std::max(ans, o.first);
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for (int v : g[o.second]) {
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if (!vis[v]) {
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d[v]--;
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q.emplace(d[v], v);
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}
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}
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}
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}
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cout << ans << endl;
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return 0;
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}
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BIN
NFLSOJ/0/3692/samples/graph1.ans
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NFLSOJ/0/3692/samples/graph1.ans
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NFLSOJ/0/3692/samples/graph1.in
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NFLSOJ/0/3692/samples/graph1.in
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NFLSOJ/0/3692/samples/graph2.ans
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NFLSOJ/0/3692/samples/graph2.ans
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NFLSOJ/0/3692/samples/graph2.in
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NFLSOJ/0/3692/samples/graph2.in
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NFLSOJ/0/3692/samples/graph3.ans
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NFLSOJ/0/3692/samples/graph3.ans
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NFLSOJ/0/3692/samples/graph3.in
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NFLSOJ/0/3692/samples/graph3.in
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