結果
| 問題 | No.2464 To DAG |
| ユーザー |
 siganai
|
| 提出日時 | 2023-09-08 22:03:03 |
| 言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 7,266 bytes |
| コンパイル時間 | 2,475 ms |
| コンパイル使用メモリ | 220,964 KB |
| 実行使用メモリ | 82,400 KB |
| 最終ジャッジ日時 | 2024-06-26 15:02:36 |
| 合計ジャッジ時間 | 21,296 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge5 |
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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
6,816 KB |
| testcase_01 | WA | - |
| testcase_02 | AC | 750 ms
82,400 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 | - |
ソースコード
#line 1 "main.cpp"
//#pragma GCC target("avx,avx2")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#ifdef LOCAL
#include <debug.hpp>
#define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#define debug(...) (static_cast<void>(0))
#endif
using namespace std;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using pii = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vvvl = vector<vvl>;
using vpii = vector<pii>;
using vpll = vector<pll>;
using vs = vector<string>;
template<class T> using pq = priority_queue<T, vector<T>, greater<T>>;
#define overload4(_1, _2, _3, _4, name, ...) name
#define overload3(a,b,c,name,...) name
#define rep1(n) for (ll UNUSED_NUMBER = 0; UNUSED_NUMBER < (n); ++UNUSED_NUMBER)
#define rep2(i, n) for (ll i = 0; i < (n); ++i)
#define rep3(i, a, b) for (ll i = (a); i < (b); ++i)
#define rep4(i, a, b, c) for (ll i = (a); i < (b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep1(n) for(ll i = (n) - 1;i >= 0;i--)
#define rrep2(i,n) for(ll i = (n) - 1;i >= 0;i--)
#define rrep3(i,a,b) for(ll i = (b) - 1;i >= (a);i--)
#define rrep4(i,a,b,c) for(ll i = (a) + ((b)-(a)-1) / (c) * (c);i >= (a);i -= c)
#define rrep(...) overload4(__VA_ARGS__, rrep4, rrep3, rrep2, rrep1)(__VA_ARGS__)
#define all1(i) begin(i) , end(i)
#define all2(i,a) begin(i) , begin(i) + a
#define all3(i,a,b) begin(i) + a , begin(i) + b
#define all(...) overload3(__VA_ARGS__, all3, all2, all1)(__VA_ARGS__)
#define sum(...) accumulate(all(__VA_ARGS__),0LL)
template<class T> bool chmin(T &a, const T &b){ if(a > b){ a = b; return 1; } else return 0; }
template<class T> bool chmax(T &a, const T &b){ if(a < b){ a = b; return 1; } else return 0; }
template<class T> auto min(const T& a){return *min_element(all(a));}
template<class T> auto max(const T& a){return *max_element(all(a));}
template<class... Ts> void in(Ts&... t);
#define INT(...) int __VA_ARGS__; in(__VA_ARGS__)
#define LL(...) ll __VA_ARGS__; in(__VA_ARGS__)
#define STR(...) string __VA_ARGS__; in(__VA_ARGS__)
#define CHR(...) char __VA_ARGS__; in(__VA_ARGS__)
#define DBL(...) double __VA_ARGS__; in(__VA_ARGS__)
#define LD(...) ld __VA_ARGS__; in(__VA_ARGS__)
#define VEC(type, name, size) vector<type> name(size); in(name)
#define VV(type, name, h, w) vector<vector<type>> name(h, vector<type>(w)); in(name)
ll intpow(ll a, ll b){ ll ans = 1; while(b){if(b & 1) ans *= a; a *= a; b /= 2;} return ans;}
ll modpow(ll a, ll b, ll p){ ll ans = 1; a %= p;if(a < 0) a += p;while(b){ if(b & 1) (ans *= a) %= p; (a *= a) %= p; b /= 2; } return ans; }
ll GCD(ll a,ll b) { if(a == 0 || b == 0) return 0; if(a % b == 0) return b; else return GCD(b,a%b);}
ll LCM(ll a,ll b) { if(a == 0) return b; if(b == 0) return a;return a / GCD(a,b) * b;}
namespace IO{
#define VOID(a) decltype(void(a))
struct setting{ setting(){cin.tie(nullptr); ios::sync_with_stdio(false);fixed(cout); cout.precision(12);}} setting;
template<int I> struct P : P<I-1>{};
template<> struct P<0>{};
template<class T> void i(T& t){ i(t, P<3>{}); }
void i(vector<bool>::reference t, P<3>){ int a; i(a); t = a; }
template<class T> auto i(T& t, P<2>) -> VOID(cin >> t){ cin >> t; }
template<class T> auto i(T& t, P<1>) -> VOID(begin(t)){ for(auto&& x : t) i(x); }
template<class T, size_t... idx> void ituple(T& t, index_sequence<idx...>){in(get<idx>(t)...);}
template<class T> auto i(T& t, P<0>) -> VOID(tuple_size<T>{}){ituple(t, make_index_sequence<tuple_size<T>::value>{});}
#undef VOID
}
#define unpack(a) (void)initializer_list<int>{(a, 0)...}
template<class... Ts> void in(Ts&... t){ unpack(IO :: i(t)); }
#undef unpack
static const double PI = 3.1415926535897932;
template <class F> struct REC {
F f;
REC(F &&f_) : f(forward<F>(f_)) {}
template <class... Args> auto operator()(Args &&...args) const { return f(*this, forward<Args>(args)...); }};
//constexpr int mod = 1000000007;
constexpr int mod = 998244353;
#line 2 "library/graph/graph-template.hpp"
template <typename T>
struct Edge {
int from, to;
T cost;
Edge() = default;
Edge(int _to, T _cost) : from(-1), to(_to), cost(_cost) {}
Edge(int _from, int _to, T _cost) : from(_from), to(_to), cost(_cost) {}
bool operator < (const Edge &a) const { return cost < a.cost; }
bool operator > (const Edge &a) const { return cost > a.cost; }
Edge &operator = (const int &x) {
to = x;
return *this;
}
operator int() const { return to; }
friend ostream operator<<(ostream &os, Edge &edge) { return os << edge.to; }
};
template <typename T>
using Edges = vector<Edge<T>>;
template <typename T>
using Wgraph = vector<Edges<T>>;
using Ugraph = vector<vector<int>>;
Ugraph uinput(int N, int M = -1, bool is_directed = false, int origin = 1) {
Ugraph g(N);
if (M == -1) M = N - 1;
while(M--) {
int a,b;
cin >> a >> b;
a -= origin, b -= origin;
g[a].push_back(b);
if(!is_directed) g[b].push_back(a);
}
return g;
}
template <typename T>
Wgraph<T> winput(int N, int M = -1, bool is_directed = false,int origin = 1) {
Wgraph<T> g(N);
if (M == -1) M = N - 1;
while(M--) {
int a,b;
T c;
cin >> a >> b >> c;
a -= origin, b -= origin;
g[a].emplace_back(b,c);
if(!is_directed) g[b].emplace_back(a,c);
}
return g;
}
#line 3 "library/graph/cycledetection.hpp"
//自己ループは判定しない
template <typename G>
vector<pair<int,int>> cycleditection(const G &g,bool directed = true) {
vector<int> pidx(g.size(),-1),vis(g.size());
vector<pair<int,int>> cycle;
int fin = 0;
auto dfs = [&](auto rec,int cur,int pval,int par) -> int {
pidx[cur] = pval;
vis[cur] = 1;
for(auto &dst:g[cur]) {
if(fin) return -1;
if(!directed && dst == par) continue;
if(pidx[dst] == pidx[cur]) {
cycle.emplace_back(cur,dst);
return dst;
}
if(vis[dst]) continue;
int nx = rec(rec,dst,pval,cur);
if(nx != -1) {
cycle.emplace_back(cur,dst);
if(cur == nx) {
fin = 1;
return -1;
}
return nx;
}
}
pidx[cur] = -1;
return -1;
};
for(int i = 0;i < (int)g.size();i++) {
if(vis[i])continue;
dfs(dfs,i,i,-1);
}
if(fin) {
reverse(begin(cycle),end(cycle));
return cycle;
}
return vector<pair<int,int>> {};
}
#line 85 "main.cpp"
int main() {
INT(n,m);
vvi g(n);
map<pii,int> mp;
rep(i,m) {
INT(u,v);
u--,v--;
g[u].emplace_back(v);
mp[make_pair(u,v)]++;
}
auto ret = cycleditection<vvi>(g);
if(ret.empty()) {
cout << -1 << '\n';
}
for(auto &&[u,v]:ret) mp[make_pair(u,v)]--;
vpii ans;
for(auto &[x,cnt]:mp) {
rep(i,cnt) ans.emplace_back(x.first + 1,x.second + 1);
}
cout << n << " " << ans.size() << '\n';
for(auto &&[u,v]:ans) cout << u << " " << v << '\n';
}