test/cpv/aizu-grl/grl_4_a.cpp
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|---|---|---|---|
| 1 | // competitive-verifier: PROBLEM https://onlinejudge.u-aizu.ac.jp/courses/library/5/GRL/all/GRL_4_A | ||
| 2 | #include "../../../src/graph/ds/alist/lib.hpp" | ||
| 3 | #include "../../../src/graph/topo_sort/lib.hpp" | ||
| 4 | |||
| 5 | using namespace tifa_libs; | ||
| 6 | 44 | int main() { | |
| 7 |
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44 | std::cin.tie(nullptr)->std::ios::sync_with_stdio(false); |
| 8 | u32 n, m; | ||
| 9 |
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44 | std::cin >> n >> m; |
| 10 | 44 | alist g(n); | |
| 11 |
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8491 | for (u32 i = 0, u, v; i < m; ++i) { |
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8447 | std::cin >> u >> v; |
| 13 | 8447 | g.add_arc(u, v); | |
| 14 | } | ||
| 15 |
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44 | std::cout << topo_sort(g).empty() << '\n'; |
| 16 | 44 | return 0; | |
| 17 | 44 | } | |
| 18 |