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template<typename T, typename U> struct Segtree{ struct SegNode{ T val; U lazy; SegNode* l; SegNode* r; SegNode(T val, U lazy) : val(val), lazy(lazy), l(nullptr), r(nullptr){} }; i64 n; function<T(T, T)> f; function<T(T, U, int)> g; function<U(U, U)> h; T op_t; U op_u; SegNode* root; Segtree(int n_, function<T(T, T)> f, function<T(T, U, int)> g, function<U(U, U)> h, T op_t, U op_u) : f(f), g(g), h(h), op_t(op_t), op_u(op_u){ for(n = 1; n < n_; n <<= 1); root = new SegNode(op_t, op_u); } SegNode* getl(SegNode* node){ return node->l ? node->l : node->l = new SegNode(op_t, op_u); } SegNode* getr(SegNode* node){ return node->r ? node->r : node->r = new SegNode(op_t, op_u); } void eval(SegNode* node, i64 len){ node->val = g(node->val, node->lazy, len); getl(node); node->l->lazy = h(node->l->lazy, node->lazy); getr(node); node->r->lazy = h(node->r->lazy, node->lazy); node->lazy = op_u; } void update(i64 x, i64 y, U val, SegNode* node = nullptr, i64 l = 0, i64 r = 0){ if(node == nullptr){ node = root; r = n; } eval(node, r - l); if(r <= x || y <= l) return ; if(x <= l && r <= y){ node->lazy = h(node->lazy, val); eval(node, r - l); }else{ i64 mid = (l + r) >> 1; update(x, y, val, getl(node), l, mid); update(x, y, val, getr(node), mid, r); node->val = f(node->l->val, node->r->val); } } T get(i64 x, i64 y, SegNode* node = nullptr, i64 l = 0, i64 r = 0){ if(node == nullptr){ node = root; r = n; } if(r <= x || y <= l) return op_t; eval(node, r - l); if(x <= l && r <= y) return node->val; i64 val_l = op_t, val_r = op_t; i64 mid = (l + r) >> 1; if(node->l) val_l = get(x, y, node->l, l, mid); if(node->r) val_r = get(x, y, node->r, mid, r); return f(val_l, val_r); } };
#line 1 "lib/classes/dynamiclazysegmenttree.cpp" template<typename T, typename U> struct Segtree{ struct SegNode{ T val; U lazy; SegNode* l; SegNode* r; SegNode(T val, U lazy) : val(val), lazy(lazy), l(nullptr), r(nullptr){} }; i64 n; function<T(T, T)> f; function<T(T, U, int)> g; function<U(U, U)> h; T op_t; U op_u; SegNode* root; Segtree(int n_, function<T(T, T)> f, function<T(T, U, int)> g, function<U(U, U)> h, T op_t, U op_u) : f(f), g(g), h(h), op_t(op_t), op_u(op_u){ for(n = 1; n < n_; n <<= 1); root = new SegNode(op_t, op_u); } SegNode* getl(SegNode* node){ return node->l ? node->l : node->l = new SegNode(op_t, op_u); } SegNode* getr(SegNode* node){ return node->r ? node->r : node->r = new SegNode(op_t, op_u); } void eval(SegNode* node, i64 len){ node->val = g(node->val, node->lazy, len); getl(node); node->l->lazy = h(node->l->lazy, node->lazy); getr(node); node->r->lazy = h(node->r->lazy, node->lazy); node->lazy = op_u; } void update(i64 x, i64 y, U val, SegNode* node = nullptr, i64 l = 0, i64 r = 0){ if(node == nullptr){ node = root; r = n; } eval(node, r - l); if(r <= x || y <= l) return ; if(x <= l && r <= y){ node->lazy = h(node->lazy, val); eval(node, r - l); }else{ i64 mid = (l + r) >> 1; update(x, y, val, getl(node), l, mid); update(x, y, val, getr(node), mid, r); node->val = f(node->l->val, node->r->val); } } T get(i64 x, i64 y, SegNode* node = nullptr, i64 l = 0, i64 r = 0){ if(node == nullptr){ node = root; r = n; } if(r <= x || y <= l) return op_t; eval(node, r - l); if(x <= l && r <= y) return node->val; i64 val_l = op_t, val_r = op_t; i64 mid = (l + r) >> 1; if(node->l) val_l = get(x, y, node->l, l, mid); if(node->r) val_r = get(x, y, node->r, mid, r); return f(val_l, val_r); } };