結果
問題 | No.2290 UnUnion Find |
ユーザー | h-izu |
提出日時 | 2023-05-11 02:35:06 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 6,900 bytes |
コンパイル時間 | 4,618 ms |
コンパイル使用メモリ | 289,220 KB |
実行使用メモリ | 16,512 KB |
最終ジャッジ日時 | 2024-11-27 04:49:15 |
合計ジャッジ時間 | 21,401 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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
5,248 KB |
testcase_01 | AC | 3 ms
5,248 KB |
testcase_02 | AC | 265 ms
5,248 KB |
testcase_03 | AC | 214 ms
9,856 KB |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | AC | 216 ms
9,856 KB |
testcase_07 | AC | 219 ms
9,856 KB |
testcase_08 | AC | 220 ms
9,856 KB |
testcase_09 | AC | 211 ms
9,856 KB |
testcase_10 | WA | - |
testcase_11 | AC | 228 ms
9,856 KB |
testcase_12 | AC | 216 ms
9,856 KB |
testcase_13 | AC | 221 ms
9,984 KB |
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 | AC | 260 ms
13,184 KB |
testcase_25 | WA | - |
testcase_26 | AC | 282 ms
14,848 KB |
testcase_27 | AC | 266 ms
13,696 KB |
testcase_28 | WA | - |
testcase_29 | AC | 259 ms
12,288 KB |
testcase_30 | WA | - |
testcase_31 | AC | 261 ms
11,392 KB |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | AC | 286 ms
16,512 KB |
testcase_35 | AC | 277 ms
14,592 KB |
testcase_36 | WA | - |
testcase_37 | WA | - |
testcase_38 | WA | - |
testcase_39 | WA | - |
testcase_40 | AC | 267 ms
13,952 KB |
testcase_41 | WA | - |
testcase_42 | WA | - |
testcase_43 | WA | - |
testcase_44 | AC | 221 ms
9,856 KB |
testcase_45 | WA | - |
testcase_46 | WA | - |
ソースコード
#ifdef __LOCAL #define _GLIBCXX_DEBUG #endif #include <bits/stdc++.h> #include <atcoder/all> using namespace std; using namespace atcoder; typedef unsigned long long ull; typedef long long ll; const double PI = 3.14159265358979323846; #define rep(i, n) for (ll i = 0; i < (ll)(n); i++) // aよりもbが大きいならばaをbで更新する // (更新されたならばtrueを返す) template <typename T> bool chmax(T& a, const T& b) { if (a < b) { a = b; // aをbで更新 return true; } return false; } // aよりもbが小さいならばaをbで更新する // (更新されたならばtrueを返す) template <typename T> bool chmin(T& a, const T& b) { if (a > b) { a = b; // aをbで更新 return true; } return false; } // a^p // 2^3 = 2 * 2^2 // 2^2 = 2 * (2^1) // 2^1 = 2 ll powpow(ll a, ll p) { if (p == 0) return 1; if (p % 2 == 0) { ll half = powpow(a, p / 2); return half * half; } else { return a * powpow(a, p - 1); } } class combination { private: ll N; vector<vector<ll>> C; public: explicit combination(ll _n) : N(_n) { C.resize(N + 1); rep(i, N + 1) C[i].resize(N + 1); C[0][0] = 1; rep(i, N) rep(j, i + 1) { C[i + 1][j + 1] += C[i][j]; C[i + 1][j] += C[i][j]; } } ll operator()(ll n, ll k) { if (n < k) return 0; if (n < 0 || k < 0) return 0; return C[n][k]; } }; // ref. https://drken1215.hatenablog.com/entry/2018/06/08/210000 class modcombination { private: ll mod; vector<ll> fac, finv, inv; public: modcombination(ll n, ll _mod) : mod(_mod) { fac.resize(n + 1); finv.resize(n + 1); inv.resize(n + 1); fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for (ll i = 2; i <= n; i++) { fac[i] = fac[i - 1] * i % mod; inv[i] = mod - inv[mod % i] * (mod / i) % mod; finv[i] = finv[i - 1] * inv[i] % mod; } } ll operator()(ll n, ll k) { if (n < k) return 0; if (n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n - k] % mod) % mod; } }; // cf. https://qiita.com/drken/items/a14e9af0ca2d857dad23 vector<ll> enum_divisors(ll n) { vector<ll> res; // sqrt(n)まで試し割り for (ll i = 1; i * i <= n; i++) { if (n % i == 0) { res.push_back(i); // 重複しないならばiの相方であるn/iも約数 // e.g. n=25のときのi=5は重複 if (n / i != i) res.push_back(n / i); } } sort(res.begin(), res.end()); return res; } // cf. https://qiita.com/drken/items/a14e9af0ca2d857dad23 map<ll, ll> prime_factors(ll n) { map<ll, ll> res; // sqrt(n)まで試し割り for (ll a = 2; a * a <= n; a++) { if (n % a != 0) continue; // nで割れる限り割る while (n % a == 0) { res[a]++; n /= a; } } if (n != 1) res[n]++; return res; } // p/q struct fraction { ll p, q; fraction(ll _p = 0, ll _q = 1) : p(_p), q(_q) { if (q == 0) { p = 1; return; } if (q < 0) { p = -p; q = -q; } ll g = gcd(p, q); p /= g; q /= g; } bool operator<(const fraction& other) const { return p * other.q < q * other.p; } bool operator<=(const fraction& other) const { return p * other.q <= q * other.p; } bool operator==(const fraction& other) const { return p == other.p && q == other.q; } }; // res[i][c] := i 文字目以降で最初に文字 c が登場する index (存在しないときは n) vector<vector<ll>> calcNext(const string& S) { ll n = (ll)S.size(); vector<vector<ll>> res(n + 1, vector<ll>(26, n)); for (ll i = n - 1; i >= 0; --i) { for (ll j = 0; j < 26; ++j) res[i][j] = res[i + 1][j]; res[i][S[i] - 'a'] = i; } return res; } // ref. https://algo-logic.info/bridge-lowlink/ struct LowLink { vector<vector<ll>> G; vector<ll> ord, low; vector<bool> visited; vector<pair<ll, ll>> bridges; explicit LowLink(const vector<vector<ll>>& _G) : G(_G) { visited.resize(G.size(), false); ord.resize(G.size(), 0); low.resize(G.size(), 0); ll k = 0; rep(i, (ll)G.size()) { if (visited[i]) continue; k = dfs(i, k); } } ll dfs(ll node, ll k, ll parent = -1) { visited[node] = true; ord[node] = k; low[node] = k; k++; for (auto g : G[node]) { if (!visited[g]) { k = dfs(g, k, node); low[node] = min(low[node], low[g]); if (ord[node] < low[g]) { bridges.emplace_back(node, g); } } else if (g != parent) { low[node] = min(low[node], ord[g]); } } return k; } }; // 3x3(アフィン変換) struct matrix { vector<vector<ll>> a; matrix(const vector<vector<ll>>& _a = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}}) : a(_a) {} matrix operator*(const matrix& x) { matrix res({{0, 0, 0}, {0, 0, 0}, {0, 0, 0}}); rep(i, 3) rep(j, 3) rep(k, 3) { // cout << i << "," << j << " <- " << a[i][k] << "*" << x.a[k][j] << endl; res.a[i][j] += a[i][k] * x.a[k][j]; } return res; } vector<ll> operator*(const vector<ll>& x) { matrix other({{x[0], 0, 0}, {x[1], 0, 0}, {1, 0, 0}}); auto res = *this * other; return vector<ll>({res.a[0][0], res.a[1][0], res.a[2][0]}); } }; ll inverse_number(const vector<ll>& a) { ll n = a.size(); ll ret = 0; fenwick_tree<ll> t(n); rep(i, n) { ret += t.sum(a[i] + 1, n); t.add(a[i], 1); } return ret; } ll swap_distance(const vector<ll>& a, const vector<ll>& b) { if (a.size() != b.size()) { return -1; } ll n = a.size(); using P = pair<ll, ll>; vector<P> _a(n), _b(n); rep(i, n) { _a[i] = {a[i], i}; _b[i] = {b[i], i}; } sort(_a.begin(), _a.end()); sort(_b.begin(), _b.end()); vector<ll> p(n); rep(i, n) { auto [va, ai] = _a[i]; auto [vb, bi] = _b[i]; if (va != vb) { return -1; } p[ai] = bi; } return inverse_number(p); } // {g,x,y}: ax+by = g tuple<ll, ll, ll> extgcd(ll a, ll b) { if (b == 0) { return {a, 1, 0}; } auto [g, x, y] = extgcd(b, a % b); return {g, y, x - (a / b) * y}; } int main() { cin.tie(nullptr); ios_base::sync_with_stdio(false); cout << fixed << setprecision(15); ll n, q; cin >> n >> q; dsu dsu(n); map<ll, ll> mp; rep(i, n) { mp[i] = i; } rep(_, q) { ll query; cin >> query; if (query == 1) { ll u, v; cin >> u >> v; u--; v--; if (dsu.same(u, v)) continue; dsu.merge(u, v); if (dsu.leader(u) == u) { mp.erase(v); } else { mp.erase(u); } } else { ll u; cin >> u; u--; if (dsu.size(u) == n) { cout << -1 << endl; } else { for (auto [leader, _] : mp) { if (leader != dsu.leader(u)) { cout << leader + 1 << endl; break; } } } } } return 0; }