結果
問題 | No.2290 UnUnion Find |
ユーザー | OnjoujiToki |
提出日時 | 2023-07-22 10:12:41 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,658 bytes |
コンパイル時間 | 1,514 ms |
コンパイル使用メモリ | 135,044 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-09-22 10:28:49 |
合計ジャッジ時間 | 9,995 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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 | WA | - |
testcase_01 | WA | - |
testcase_02 | AC | 36 ms
5,376 KB |
testcase_03 | AC | 46 ms
5,376 KB |
testcase_04 | AC | 47 ms
5,376 KB |
testcase_05 | WA | - |
testcase_06 | AC | 46 ms
5,376 KB |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | AC | 45 ms
5,376 KB |
testcase_11 | WA | - |
testcase_12 | AC | 46 ms
5,376 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 46 ms
5,376 KB |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | AC | 53 ms
5,376 KB |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | AC | 54 ms
5,376 KB |
testcase_35 | AC | 54 ms
5,376 KB |
testcase_36 | WA | - |
testcase_37 | WA | - |
testcase_38 | WA | - |
testcase_39 | WA | - |
testcase_40 | AC | 52 ms
5,376 KB |
testcase_41 | WA | - |
testcase_42 | WA | - |
testcase_43 | WA | - |
testcase_44 | WA | - |
testcase_45 | AC | 47 ms
5,376 KB |
testcase_46 | WA | - |
ソースコード
#include <algorithm> #include <array> #include <bitset> #include <cassert> #include <chrono> #include <cmath> #include <complex> #include <cstdint> #include <cstring> #include <ctime> #include <deque> #include <iomanip> #include <iostream> #include <map> #include <numeric> #include <queue> #include <random> #include <set> #include <unordered_map> #include <unordered_set> using namespace std; template <int mod> struct ModInt { int x; ModInt() : x(0) {} ModInt(long long y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {} ModInt &operator+=(const ModInt &p) { if ((x += p.x) >= mod) x -= mod; return *this; } ModInt &operator-=(const ModInt &p) { if ((x += mod - p.x) >= mod) x -= mod; return *this; } ModInt &operator*=(const ModInt &p) { x = (int)(1LL * x * p.x % mod); return *this; } ModInt &operator/=(const ModInt &p) { *this *= p.inverse(); return *this; } ModInt &operator^=(long long p) { // quick_pow here:3 ModInt res = 1; for (; p; p >>= 1) { if (p & 1) res *= *this; *this *= *this; } return *this = res; } ModInt operator-() const { return ModInt(-x); } ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; } ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; } ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; } ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; } ModInt operator^(long long p) const { return ModInt(*this) ^= p; } bool operator==(const ModInt &p) const { return x == p.x; } bool operator!=(const ModInt &p) const { return x != p.x; } explicit operator int() const { return x; } // added by QCFium ModInt operator=(const int p) { x = p; return ModInt(*this); } // added by QCFium ModInt inverse() const { int a = x, b = mod, u = 1, v = 0, t; while (b > 0) { t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); } return ModInt(u); } friend std::ostream &operator<<(std::ostream &os, const ModInt<mod> &p) { return os << p.x; } friend std::istream &operator>>(std::istream &is, ModInt<mod> &a) { long long x; is >> x; a = ModInt<mod>(x); return (is); } }; struct Mo { int n; std::vector<std::pair<int, int>> lr; explicit Mo(int n) : n(n) {} void add(int l, int r) { /* [l, r) */ lr.emplace_back(l, r); } template <typename AL, typename AR, typename EL, typename ER, typename O> void build(const AL &add_left, const AR &add_right, const EL &erase_left, const ER &erase_right, const O &out) { int q = (int)lr.size(); int bs = n / std::min<int>(n, sqrt(q)); std::vector<int> ord(q); std::iota(std::begin(ord), std::end(ord), 0); std::sort(std::begin(ord), std::end(ord), [&](int a, int b) { int ablock = lr[a].first / bs, bblock = lr[b].first / bs; if (ablock != bblock) return ablock < bblock; return (ablock & 1) ? lr[a].second > lr[b].second : lr[a].second < lr[b].second; }); int l = 0, r = 0; for (auto idx : ord) { while (l > lr[idx].first) add_left(--l); while (r < lr[idx].second) add_right(r++); while (l < lr[idx].first) erase_left(l++); while (r > lr[idx].second) erase_right(--r); out(idx); } } template <typename A, typename E, typename O> void build(const A &add, const E &erase, const O &out) { build(add, add, erase, erase, out); } }; template <typename T> struct DSU { std::vector<T> f, siz; DSU(int n) : f(n), siz(n, 1) { std::iota(f.begin(), f.end(), 0); } T leader(T x) { while (x != f[x]) x = f[x] = f[f[x]]; return x; } bool same(T x, T y) { return leader(x) == leader(y); } bool merge(T x, T y) { x = leader(x); y = leader(y); if (x == y) return false; siz[x] += siz[y]; f[y] = x; return true; } T size(int x) { return siz[leader(x)]; } }; void solve() { int n, q; std::cin >> n >> q; DSU<int> dsu(n); int l = 0, r = n - 1; while (q--) { int t; std::cin >> t; if (t == 1) { int u, v; std::cin >> u >> v; u--, v--; dsu.merge(u, v); while (r != dsu.leader(r)) r--; while (l != dsu.leader(l)) l++; } else { int v; std::cin >> v; if (l == r) { std::cout << -1 << '\n'; } else if (dsu.same(l, v)) { std::cout << r + 1 << '\n'; } else std::cout << l + 1 << '\n'; } } } int main() { std::ios::sync_with_stdio(false); std::cin.tie(nullptr); int t = 1; while (t--) solve(); return 0; }