結果
| 問題 | No.3107 Listening |
| ユーザー |
 dyktr_06
|
| 提出日時 | 2024-04-01 22:22:21 |
| 言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 7,079 bytes |
| コンパイル時間 | 2,525 ms |
| コンパイル使用メモリ | 227,744 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-09-30 22:32:24 |
| 合計ジャッジ時間 | 19,110 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge2 |
（要ログイン）
テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 2 ms
5,248 KB |
| testcase_01 | AC | 2 ms
5,248 KB |
| testcase_02 | AC | 2 ms
5,248 KB |
| testcase_03 | WA | - |
| testcase_04 | WA | - |
| testcase_05 | WA | - |
| testcase_06 | WA | - |
| testcase_07 | WA | - |
| testcase_08 | WA | - |
| testcase_09 | WA | - |
| testcase_10 | WA | - |
| testcase_11 | WA | - |
| testcase_12 | WA | - |
| testcase_13 | WA | - |
| testcase_14 | WA | - |
| testcase_15 | WA | - |
| testcase_16 | WA | - |
| testcase_17 | WA | - |
| testcase_18 | WA | - |
| testcase_19 | WA | - |
| testcase_20 | WA | - |
| testcase_21 | WA | - |
| testcase_22 | WA | - |
| testcase_23 | WA | - |
| testcase_24 | WA | - |
| testcase_25 | WA | - |
| testcase_26 | WA | - |
| testcase_27 | WA | - |
| testcase_28 | WA | - |
| testcase_29 | WA | - |
| testcase_30 | WA | - |
| testcase_31 | WA | - |
| testcase_32 | WA | - |
| testcase_33 | WA | - |
| testcase_34 | WA | - |
| testcase_35 | WA | - |
| testcase_36 | WA | - |
| testcase_37 | WA | - |
| testcase_38 | WA | - |
| testcase_39 | WA | - |
| testcase_40 | WA | - |
| testcase_41 | WA | - |
| testcase_42 | WA | - |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define overload4(_1, _2, _3, _4, name, ...) name
#define rep1(n) for(int i = 0; i < (int)(n); ++i)
#define rep2(i, n) for(int i = 0; i < (int)(n); ++i)
#define rep3(i, a, b) for(int i = (a); i < (int)(b); ++i)
#define rep4(i, a, b, c) for(int i = (a); i < (int)(b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; --i)
#define ALL(a) (a).begin(), (a).end()
#define Sort(a) (sort((a).begin(), (a).end()))
#define RSort(a) (sort((a).rbegin(), (a).rend()))
#define UNIQUE(a) (a.erase(unique((a).begin(), (a).end()), (a).end()))
typedef long long int ll;
typedef unsigned long long ul;
typedef long double ld;
typedef vector<int> vi;
typedef vector<long long> vll;
typedef vector<char> vc;
typedef vector<string> vst;
typedef vector<double> vd;
typedef vector<long double> vld;
typedef pair<long long, long long> P;
template<class T> long long sum(const T& a){ return accumulate(a.begin(), a.end(), 0LL); }
template<class T> auto min(const T& a){ return *min_element(a.begin(), a.end()); }
template<class T> auto max(const T& a){ return *max_element(a.begin(), a.end()); }
const long long MINF = 0x7fffffffffff;
const long long INF = 0x1fffffffffffffff;
const long long MOD = 998244353;
const long double EPS = 1e-9;
const long double PI = acos(-1);
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
template<typename T1, typename T2> istream &operator>>(istream &is, pair<T1, T2> &p){ is >> p.first >> p.second; return is; }
template<typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &p){ os << "(" << p.first << ", " << p.second << ")"; return os; }
template<typename T> istream &operator>>(istream &is, vector<T> &v){ for(T &in : v) is >> in; return is; }
template<typename T> ostream &operator<<(ostream &os, const vector<T> &v){ for(int i = 0; i < (int) v.size(); ++i){ os << v[i] << (i + 1 != (int) v.size() ? " " : ""); } return os; }
template <typename T, typename S> ostream &operator<<(ostream &os, const map<T, S> &mp){ for(auto &[key, val] : mp){ os << key << ":" << val << " "; } return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &st){ auto itr = st.begin(); for(int i = 0; i < (int)st.size(); ++i){ os << *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &st){ auto itr = st.begin(); for(int i = 0; i < (int)st.size(); ++i){ os << *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; }
template <typename T> ostream &operator<<(ostream &os, queue<T> q){ while(q.size()){ os << q.front() << " "; q.pop(); } return os; }
template <typename T> ostream &operator<<(ostream &os, deque<T> q){ while(q.size()){ os << q.front() << " "; q.pop_front(); } return os; }
template <typename T> ostream &operator<<(ostream &os, stack<T> st){ while(st.size()){ os << st.top() << " "; st.pop(); } return os; }
template <class T, class Container, class Compare> ostream &operator<<(ostream &os, priority_queue<T, Container, Compare> pq){ while(pq.size()){ os << pq.top() << " "; pq.pop(); } return os; }
template<class T, class U> inline T vin(T& vec, U n) { vec.resize(n); for(int i = 0; i < (int) n; ++i) cin >> vec[i]; return vec; }
template<class T> inline void vout(T vec, string s = "\n"){ for(auto x : vec) cout << x << s; }
template<class... T> void in(T&... a){ (cin >> ... >> a); }
void out(){ cout << '\n'; }
template<class T, class... Ts> void out(const T& a, const Ts&... b){ cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; }
template<class T, class U> void inGraph(vector<vector<T>>& G, U n, U m, bool directed = false){ G.resize(n); for(int i = 0; i < m; ++i){ int a, b; cin >> a >> b; a--, b--; G[a].push_back(b); if(!directed) G[b].push_back(a); } }
void input(){
}
struct GabowEdmonds {
struct edge {
int to, idx;
};
vector< vector< edge > > g;
vector< pair< int, int > > edges;
vector< int > mate, label, first;
queue< int > que;
GabowEdmonds(int n) : g(n + 1), mate(n + 1), label(n + 1, -1), first(n + 1) {}
void add_edge(int u, int v) {
++u, ++v;
g[u].push_back((edge) {v, (int) (edges.size() + g.size())});
g[v].push_back((edge) {u, (int) (edges.size() + g.size())});
edges.emplace_back(u, v);
}
int find(int x) {
if(label[first[x]] < 0) return first[x];
first[x] = find(first[x]);
return first[x];
}
void rematch(int v, int w) {
int t = mate[v];
mate[v] = w;
if(mate[t] != v) return;
if(label[v] < g.size()) {
mate[t] = label[v];
rematch(label[v], t);
} else {
int x = edges[label[v] - g.size()].first;
int y = edges[label[v] - g.size()].second;
rematch(x, y);
rematch(y, x);
}
}
void assign_label(int x, int y, int num) {
int r = find(x);
int s = find(y);
int join = 0;
if(r == s) return;
label[r] = -num;
label[s] = -num;
while(true) {
if(s != 0) swap(r, s);
r = find(label[mate[r]]);
if(label[r] == -num) {
join = r;
break;
}
label[r] = -num;
}
int v = first[x];
while(v != join) {
que.push(v);
label[v] = num;
first[v] = join;
v = first[label[mate[v]]];
}
v = first[y];
while(v != join) {
que.push(v);
label[v] = num;
first[v] = join;
v = first[label[mate[v]]];
}
}
bool augment_check(int u) {
que = queue< int >();
first[u] = 0;
label[u] = 0;
que.push(u);
while(!que.empty()) {
int x = que.front();
que.pop();
for(auto e : g[x]) {
int y = e.to;
if(mate[y] == 0 && y != u) {
mate[y] = x;
rematch(x, y);
return true;
} else if(label[y] >= 0) {
assign_label(x, y, e.idx);
} else if(label[mate[y]] < 0) {
label[mate[y]] = x;
first[mate[y]] = y;
que.push(mate[y]);
}
}
}
return false;
}
vector< pair< int, int > > max_matching() {
for(int i = 1; i < g.size(); i++) {
if(mate[i] != 0) continue;
if(augment_check(i)) label.assign(g.size(), -1);
}
vector< pair< int, int > > ret;
for(int i = 1; i < g.size(); i++) {
if(i < mate[i]) ret.emplace_back(i - 1, mate[i] - 1);
}
return ret;
}
};
void solve(){
ll n, m; in(n, m);
if(n >= 1000){
out(0);
return;
}
GabowEdmonds flow(n);
map<P, ll> mp;
rep(i, m){
ll a, b;
in(a, b); a--, b--;
flow.add_edge(a, b);
mp[{a, b}] = i, mp[{b, a}] = i;
}
auto ret = flow.max_matching();
cout << ret.size() << endl;
for(auto &p : ret) out(mp[p] + 1);
}
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << fixed << setprecision(20);
input();
solve();
}