結果
問題 | No.1790 Subtree Deletion |
ユーザー | first_vil |
提出日時 | 2021-12-19 18:47:13 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 151 ms / 3,000 ms |
コード長 | 4,913 bytes |
コンパイル時間 | 2,192 ms |
コンパイル使用メモリ | 209,260 KB |
最終ジャッジ日時 | 2025-01-27 03:55:46 |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 12 |
ソースコード
// clang-format off #include <bits/stdc++.h> using namespace std; using ll = long long; using ld = long double; template<class T> using V = vector<T>; using VI = V<int>; using VL = V<ll>; using VS = V<string>; template<class T> using PQ = priority_queue<T, V<T>, greater<T>>; using graph = V<VI>; template<class T> using w_graph = V<V<pair<int, T>>>; #define FOR(i,a,n) for(int i=(a);i<(n);++i) #define eFOR(i,a,n) for(int i=(a);i<=(n);++i) #define rFOR(i,a,n) for(int i=(n)-1;i>=(a);--i) #define erFOR(i,a,n) for(int i=(n);i>=(a);--i) #define all(a) a.begin(),a.end() #define rall(a) a.rbegin(),a.rend() #define inside(h,w,y,x) (unsigned(y)<h&&unsigned(x)<w) #ifndef ONLINE_JUDGE #define line cout << "-----------------------------\n" #define stop system("pause") #endif constexpr ll INF = 1000000000; constexpr ll LLINF = 1LL << 61; constexpr ll mod = 1000000007; constexpr ll MOD = 998244353; constexpr ld eps = 1e-10; constexpr int dy[]{ -1,0,1,0 }, dx[]{ 0,1,0,-1 }; template<class T> inline bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; }return false; } template<class T> inline bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; }return false; } inline void init() { cin.tie(nullptr); cout.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } template<class T> inline istream& operator>>(istream& is, V<T>& v) { for (auto& a : v)is >> a; return is; } template<class T, class U> inline istream& operator>>(istream& is, pair<T, U>& p) { is >> p.first >> p.second; return is; } template<class T> inline V<T> vec(size_t a) { return V<T>(a); } template<class T> inline V<T> defvec(T def, size_t a) { return V<T>(a, def); } template<class T, class... Ts> inline auto vec(size_t a, Ts... ts) { return V<decltype(vec<T>(ts...))>(a, vec<T>(ts...)); } template<class T, class... Ts> inline auto defvec(T def, size_t a, Ts... ts) { return V<decltype(defvec<T>(def, ts...))>(a, defvec<T>(def, ts...)); } template<class T> inline void print(const T& a) { cout << a << "\n"; } template<class T, class... Ts> inline void print(const T& a, const Ts&... ts) { cout << a << " "; print(ts...); } template<class T> inline void print(const V<T>& v) { for (int i = 0; i < v.size(); ++i)cout << v[i] << (i == v.size() - 1 ? "\n" : " "); } template<class T> inline void print(const V<V<T>>& v) { for (auto& a : v)print(a); } template<class T> inline constexpr const T cumsum(const V<T>& a, int l, int r) { return 0 <= l && l <= r && r < a.size() ? a[r] - (l == 0 ? 0 : a[l - 1]) : 0; }//[l,r] template<class T> inline constexpr const T min(const V<T>& v) { return *min_element(all(v)); } template<class T> inline constexpr const T max(const V<T>& v) { return *max_element(all(v)); } // clang-format on template <class T> class BinaryIndexedTree { int n; vector<T> dat; public: BinaryIndexedTree(int n) : n(n), dat(n + 1){}; BinaryIndexedTree(int n, T a) : n(n), dat(n + 1) { eFOR(i, 1, n) { dat[i] ^= a; if (i + (i & -i) <= n) dat[i + (i & -i)] ^= dat[i]; } } BinaryIndexedTree(VI v) : n(v.size()), dat(n + 1) { eFOR(i, 1, n) { dat[i] ^= v[i - 1]; if (i + (i & -i) <= n) dat[i + (i & -i)] ^= dat[i]; } } void add(int i, T a) { for (++i; i <= n; i += i & -i) dat[i] ^= a; } T sum(int r) { // sum of [0,r) T res = 0; for (; r; r -= r & -r) res ^= dat[r]; return res; } T sum(int l, int r) { // sum of [l,r) if (l < 0 || n < r || l > r) return 0; return sum(r) ^ sum(l); } }; int main() { init(); int n; cin >> n; w_graph<ll> g(n); FOR(i, 0, n - 1) { int l, r; ll a; cin >> l >> r >> a; --l, --r; g[l].emplace_back(r, a); g[r].emplace_back(l, a); } int now = 0; VI in(n), out(n), ni(n), p(n, -1); VL pc(n); auto dfs = [&](auto&& f, int cur, int par) -> void { in[cur] = now; ni[now] = cur; ++now; for (auto [to, weight] : g[cur]) { if (to == par) continue; p[to] = cur; pc[to] = weight; f(f, to, cur); } out[cur] = now; }; dfs(dfs, 0, -1); BinaryIndexedTree<ll> bit(n); set<int> alive; FOR(i, 0, n) { bit.add(in[p[i]], pc[i]); alive.insert(in[i]); } alive.insert(n + 1); int q; cin >> q; while (q--) { int t, x; cin >> t >> x; --x; if (t == 1) { for (auto it = alive.lower_bound(in[x]); *it < out[x]; it = alive.lower_bound(in[x])) { int cur = ni[*it], par = p[cur]; bit.add(in[par], pc[cur]); pc[cur] = 0; alive.erase(it); } } else { print(bit.sum(in[x], out[x])); } } return 0; }