結果
問題 | No.1640 簡単な色塗り |
ユーザー | miyo2580 |
提出日時 | 2024-02-13 22:52:33 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 87 ms / 2,000 ms |
コード長 | 5,910 bytes |
コンパイル時間 | 2,931 ms |
コンパイル使用メモリ | 228,180 KB |
実行使用メモリ | 34,880 KB |
最終ジャッジ日時 | 2024-09-28 18:40:02 |
合計ジャッジ時間 | 14,450 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
(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
6,816 KB |
testcase_01 | AC | 2 ms
6,820 KB |
testcase_02 | AC | 2 ms
6,820 KB |
testcase_03 | AC | 2 ms
6,820 KB |
testcase_04 | AC | 45 ms
16,484 KB |
testcase_05 | AC | 60 ms
32,484 KB |
testcase_06 | AC | 2 ms
6,816 KB |
testcase_07 | AC | 2 ms
6,816 KB |
testcase_08 | AC | 2 ms
6,820 KB |
testcase_09 | AC | 2 ms
6,820 KB |
testcase_10 | AC | 47 ms
13,196 KB |
testcase_11 | AC | 36 ms
11,168 KB |
testcase_12 | AC | 34 ms
10,524 KB |
testcase_13 | AC | 75 ms
18,328 KB |
testcase_14 | AC | 75 ms
18,368 KB |
testcase_15 | AC | 23 ms
8,432 KB |
testcase_16 | AC | 30 ms
9,420 KB |
testcase_17 | AC | 57 ms
15,436 KB |
testcase_18 | AC | 6 ms
6,820 KB |
testcase_19 | AC | 33 ms
10,248 KB |
testcase_20 | AC | 42 ms
12,672 KB |
testcase_21 | AC | 34 ms
11,060 KB |
testcase_22 | AC | 5 ms
6,820 KB |
testcase_23 | AC | 47 ms
13,512 KB |
testcase_24 | AC | 13 ms
6,820 KB |
testcase_25 | AC | 35 ms
10,432 KB |
testcase_26 | AC | 51 ms
14,592 KB |
testcase_27 | AC | 22 ms
8,068 KB |
testcase_28 | AC | 74 ms
17,848 KB |
testcase_29 | AC | 56 ms
14,416 KB |
testcase_30 | AC | 10 ms
6,820 KB |
testcase_31 | AC | 75 ms
28,076 KB |
testcase_32 | AC | 74 ms
32,568 KB |
testcase_33 | AC | 51 ms
21,720 KB |
testcase_34 | AC | 56 ms
20,664 KB |
testcase_35 | AC | 42 ms
17,480 KB |
testcase_36 | AC | 12 ms
7,936 KB |
testcase_37 | AC | 17 ms
11,388 KB |
testcase_38 | AC | 71 ms
25,020 KB |
testcase_39 | AC | 28 ms
12,640 KB |
testcase_40 | AC | 27 ms
11,044 KB |
testcase_41 | AC | 58 ms
22,724 KB |
testcase_42 | AC | 30 ms
11,804 KB |
testcase_43 | AC | 31 ms
13,960 KB |
testcase_44 | AC | 34 ms
17,732 KB |
testcase_45 | AC | 29 ms
16,968 KB |
testcase_46 | AC | 11 ms
7,412 KB |
testcase_47 | AC | 8 ms
7,424 KB |
testcase_48 | AC | 73 ms
34,880 KB |
testcase_49 | AC | 4 ms
6,820 KB |
testcase_50 | AC | 2 ms
6,816 KB |
testcase_51 | AC | 1 ms
6,816 KB |
testcase_52 | AC | 78 ms
24,548 KB |
testcase_53 | AC | 87 ms
31,076 KB |
07_evil_01.txt | AC | 207 ms
36,908 KB |
07_evil_02.txt | AC | 369 ms
52,856 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define repd(i,a,b) for (ll i=(a);i<(b);i++) #define rep(i,n) repd(i,0,n) #define all(x) (x).begin(),(x).end() template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; } template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; } typedef long long ll; typedef pair<ll,ll> P; typedef vector<ll> vec; using Graph = vector<vector<ll>>; const long long INF = 1LL<<60; const long long MOD = 1000000007; // Sieve of Eratosthenes // https://youtu.be/UTVg7wzMWQc?t=2774 struct Sieve { int n; vector<int> f, primes; Sieve(int n=1):n(n), f(n+1) { f[0] = f[1] = -1; for (ll i = 2; i <= n; ++i) { if (f[i]) continue; primes.push_back(i); f[i] = i; for (ll j = i*i; j <= n; j += i) { if (!f[j]) f[j] = i; } } } bool isPrime(int x) { return f[x] == x;} vector<int> factorList(int x) { vector<int> res; while (x != 1) { res.push_back(f[x]); x /= f[x]; } return res; } vector<P> factor(int x) { vector<int> fl = factorList(x); if (fl.size() == 0) return {}; vector<P> res(1, P(fl[0], 0)); for (int p : fl) { if (res.back().first == p) { res.back().second++; } else { res.emplace_back(p, 1); } } return res; } vector<pair<ll,int>> factor(ll x) { vector<pair<ll,int>> res; for (int p : primes) { int y = 0; while (x%p == 0) x /= p, ++y; if (y != 0) res.emplace_back(p,y); } if (x != 1) res.emplace_back(x,1); return res; } }; //https://nyaannyaan.github.io/library/math/two-sat.hpp.html namespace TwoSatImpl { namespace internal { template <class E> struct csr { vector<int> start; vector<E> elist; csr(int n, const vector<pair<int, E>>& edges) : start(n + 1), elist(edges.size()) { for (auto e : edges) { start[e.first + 1]++; } for (int i = 1; i <= n; i++) { start[i] += start[i - 1]; } auto counter = start; for (auto e : edges) { elist[counter[e.first]++] = e.second; } } }; struct scc_graph { public: scc_graph(int n) : _n(n) {} int num_vertices() { return _n; } void add_edge(int from, int to) { edges.push_back({from, {to}}); } pair<int, vector<int>> scc_ids() { auto g = csr<edge>(_n, edges); int now_ord = 0, group_num = 0; vector<int> visited, low(_n), ord(_n, -1), ids(_n); visited.reserve(_n); auto dfs = [&](auto self, int v) -> void { low[v] = ord[v] = now_ord++; visited.push_back(v); for (int i = g.start[v]; i < g.start[v + 1]; i++) { auto to = g.elist[i].to; if (ord[to] == -1) { self(self, to); low[v] = min(low[v], low[to]); } else { low[v] = min(low[v], ord[to]); } } if (low[v] == ord[v]) { while (true) { int u = visited.back(); visited.pop_back(); ord[u] = _n; ids[u] = group_num; if (u == v) break; } group_num++; } }; for (int i = 0; i < _n; i++) { if (ord[i] == -1) dfs(dfs, i); } for (auto& x : ids) { x = group_num - 1 - x; } return {group_num, ids}; } vector<vector<int>> scc() { auto ids = scc_ids(); int group_num = ids.first; vector<int> counts(group_num); for (auto x : ids.second) counts[x]++; vector<vector<int>> groups(ids.first); for (int i = 0; i < group_num; i++) { groups[i].reserve(counts[i]); } for (int i = 0; i < _n; i++) { groups[ids.second[i]].push_back(i); } return groups; } void add_node_size(int m) { _n += m; } int size() { return _n; } private: int _n; struct edge { int to; }; vector<pair<int, edge>> edges; }; } // namespace internal struct two_sat { public: two_sat() : _n(0), built(false), scc(0) {} two_sat(int n) : _n(n), built(false), scc(2 * n) {} int add_var() { scc.add_node_size(2); return _n++; } // (not i) は ~i で渡す void add_clause(int i, int j) { i = max(2 * i, -1 - 2 * i); j = max(2 * j, -1 - 2 * j); assert(0 <= i && i < 2 * _n); assert(0 <= j && j < 2 * _n); scc.add_edge(i, j ^ 1); scc.add_edge(j, i ^ 1); } void if_then(int i, int j) { add_clause(~i, j); } void set_val(int i) { add_clause(i, i); } // (not i) は ~i で渡す void at_most_one(const vector<int>& nodes) { if ((int)nodes.size() <= 1) return; int cur = ~nodes[0]; for (int i = 2; i < (int)nodes.size(); i++) { int nxt = add_var(), n_i = ~nodes[i]; add_clause(cur, n_i); add_clause(cur, nxt); add_clause(n_i, nxt); cur = ~nxt; } add_clause(cur, ~nodes[1]); } bool satisfiable() { _answer.resize(_n); built = true; auto id = scc.scc_ids().second; for (int i = 0; i < _n; i++) { if (id[2 * i] == id[2 * i + 1]) { _answer.clear(); return false; } _answer[i] = id[2 * i] < id[2 * i + 1]; } return true; } vector<bool> answer() { if (!built) satisfiable(); return _answer; } private: int _n; vector<bool> _answer; bool built; internal::scc_graph scc; }; } // namespace TwoSatImpl using TwoSatImpl::two_sat; int main() { ios::sync_with_stdio(false); cin.tie(0); ll n;cin>>n; two_sat ts(n); vector<vector<int>> g(n); vec a(n),b(n); rep(i,n){ ll x,y; cin>>x>>y; x--;y--; a[i]=x; b[i]=y; g[x].push_back(i); g[y].push_back(~i); } rep(i,n){ ts.at_most_one(g[i]); } if(!ts.satisfiable())cout<<"No"<<endl; else{ cout<<"Yes"<<endl; vector<bool> ans=ts.answer(); rep(i,n){ if(ans[i])cout<<a[i]+1<<'\n'; else cout<<b[i]+1<<'\n'; } } return 0; }