/
scc.test.cpp
41 lines (37 loc) · 1.19 KB
/
scc.test.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
#define PROBLEM "https://judge.yosupo.jp/problem/scc"
#include <bits/stdc++.h> // clang-format off
using Int = long long;
#define REP_(i, a_, b_, a, b, ...) for (Int i = (a), lim##i = (b); i < lim##i; i++)
#define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
struct SetupIO { SetupIO() { std::cin.tie(nullptr), std::ios::sync_with_stdio(false), std::cout << std::fixed << std::setprecision(13); } } setup_io;
#ifndef _MY_DEBUG
#define dump(...)
#endif // clang-format on
/**
* author: knshnb
* created: Fri Apr 3 13:28:22 JST 2020
**/
#define CALL_FROM_TEST
#include "../../src/Graph/StronglyConnectedComponents.hpp"
#undef CALL_FROM_TEST
signed main() {
int n, m;
std::cin >> n >> m;
StronglyConnectedComponents scc(n);
REP(i, m) {
int u, v;
std::cin >> u >> v;
scc.add_edge(u, v);
}
scc.build();
std::vector<std::vector<int>> groups(scc.size);
REP(i, n) { groups[scc.belong_to[i]].push_back(i); }
std::cout << scc.size << std::endl;
for (auto& group : groups) {
std::cout << group.size() << " ";
for (int v : group) {
std::cout << v << " ";
}
std::cout << "\n";
}
}