結果
問題 | No.470 Inverse S+T Problem |
ユーザー | tubo28 |
提出日時 | 2016-12-20 14:03:42 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 86 ms / 2,000 ms |
コード長 | 3,035 bytes |
コンパイル時間 | 1,744 ms |
コンパイル使用メモリ | 183,264 KB |
実行使用メモリ | 12,672 KB |
最終ジャッジ日時 | 2024-06-01 22:43:40 |
合計ジャッジ時間 | 2,890 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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 | 1 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 1 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | AC | 1 ms
6,940 KB |
testcase_06 | AC | 1 ms
6,940 KB |
testcase_07 | AC | 1 ms
6,944 KB |
testcase_08 | AC | 1 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 1 ms
6,940 KB |
testcase_14 | AC | 1 ms
6,944 KB |
testcase_15 | AC | 2 ms
6,940 KB |
testcase_16 | AC | 2 ms
6,940 KB |
testcase_17 | AC | 1 ms
6,944 KB |
testcase_18 | AC | 1 ms
6,940 KB |
testcase_19 | AC | 2 ms
6,944 KB |
testcase_20 | AC | 1 ms
6,944 KB |
testcase_21 | AC | 2 ms
6,940 KB |
testcase_22 | AC | 1 ms
6,940 KB |
testcase_23 | AC | 1 ms
6,944 KB |
testcase_24 | AC | 1 ms
6,944 KB |
testcase_25 | AC | 1 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,940 KB |
testcase_27 | AC | 2 ms
6,940 KB |
testcase_28 | AC | 2 ms
6,944 KB |
testcase_29 | AC | 86 ms
12,672 KB |
testcase_30 | AC | 2 ms
6,944 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; #define rep(i, n) for (int i = 0; i < (int)(n); i++) #define all(c) begin(c), end(c) #define dump(x) cerr << __LINE__ << ":\t" #x " = " << x << endl using Weight = int; using Capacity = int; struct Edge { int src, dst; Weight weight; Edge(int s, int d, Weight w) : src(s), dst(d), weight(w) {} }; using Edges = vector<Edge>; using Graph = vector<Edges>; using Array = vector<Weight>; using Matrix = vector<Array>; vector<int> kosaraju(const Graph &g) { int n = g.size(), sz = 0; Graph rg(n); vector<int> stk, cmp(n, -1), added(n), visited(n), ord(n); for (auto &es : g) { for (auto &e : es) rg[e.dst].emplace_back(e.dst, e.src, e.weight); sz += es.size(); } stk.resize(n + sz); sz = 0; for (int i = 0; i < n; i++) { if (visited[i]) continue; int s = 0; stk[s++] = i; while (s != 0) { int v = stk[s - 1]; visited[v] = true; bool pushed = false; for (auto &e : g[v]) { int dst = e.dst; if (!visited[dst]) { stk[s++] = dst; pushed = true; } } if (pushed) continue; int t = stk[s - 1]; if (!added[t]) { added[t] = true; ord[n - ++sz] = t; } --s; } } int k = 0; for (int &u : ord) { if (cmp[u] != -1) continue; int s = 0; stk[s++] = u; while (s != 0) { int v = stk[--s]; cmp[v] = k; for (auto &e : rg[v]) { int d = e.dst; if (cmp[d] == -1) stk[s++] = d; } } ++k; } return cmp; } int main(){ cin.tie(0); ios::sync_with_stdio(0); int n; cin >> n; if(n > 2756){ cout << "Impossible" << endl; exit(0); } vector<string> ss(n); rep(i, n) cin >> ss[i]; int nn = n+n; Graph g(nn); auto sep = [&](int u, int v){ int iu = (u+n) % nn; int iv = (v+n) % nn; g[u].emplace_back(u, v, 1); g[iv].emplace_back(iv, iu, 1); }; vector<string> a(n), ab(n), bc(n), c(n); rep(i, n){ string &s = ss[i]; a[i] = s.substr(0, 1); ab[i] = s.substr(0, 2); bc[i] = s.substr(1); c[i] = s.substr(2); } rep(i, n) rep(j, i){ if(a[i] == a[j] || bc[i] == bc[j]) sep(i, j+n); if(a[i] == c[j] || bc[i] == ab[j]) sep(i, j); if(c[i] == a[j] || ab[i] == bc[j]) sep(i+n, j+n); if(c[i] == c[j] || ab[i] == ab[j]) sep(i+n, j); } vector<int> cmp = kosaraju(g); rep(i, n){ if(cmp[i] == cmp[i+n]){ cout << "Impossible" << '\n'; exit(0); } } rep(i, n){ if(cmp[i] < cmp[i+n]) cout << ab[i] << ' ' << c[i] << '\n'; else cout << a[i] << ' ' << bc[i] << '\n'; } }