def solve(io) n, q = io.get2 a = io.get_a(n, Int64) inf = 10_i64**18 items = a.map { |ai| Item.new(ai, ai, ai, ai) } st = SegmentTree.new(items, Item.new(0_i64, -inf, -inf, -inf)) do |l, r| Item.new( l.s + r.s, {l.t, l.s + r.t}.max, {r.u, l.u + r.s}.max, {l.v, r.v, l.u + r.t}.max ) end q.times do k = io.get(String) case k when "set" i, x = io.get(Int32, Int64); i -= 1 st[i] = Item.new(x, x, x, x) when "max" l1, l2, r1, r2 = io.get4; l1 -= 1; l2 -= 1; r1 -= 1; r2 -= 1 r1 = r1.clamp(l1..) l2 = l2.clamp(..r2) if l2 < r1 io.put st[l1..l2].u + st[l2..r1].s + st[r1..r2].t - st[l2].s - st[r1].s else m1 = st[l1..r1].u + st[r1..r2].t - st[r1].s m2 = st[l1..l2].u + st[l2..r2].t - st[l2].s m3 = st[r1..l2].v io.put({m1, m2, m3}.max) end end end end record Item, s : Int64, t : Int64, u : Int64, v : Int64 struct Int def cdiv(b : Int) (self + b - 1) // b end def bit?(i : Int) bit(i) == 1 end def set_bit(i : Int) self | (self.class.new(1) << i) end def reset_bit(i : Int) self & ~(self.class.new(1) << i) end {% if compare_versions(env("CRYSTAL_VERSION") || "0.0.0", "0.34.0") < 0 %} def bit_length : Int32 x = self < 0 ? ~self : self if x.is_a?(Int::Primitive) Int32.new(sizeof(self) * 8 - x.leading_zeros_count) else to_s(2).size end end {% end %} end struct Int32 SQRT_MAX = 46_340_i32 def isqrt m = SQRT_MAX r = (1_i32..SQRT_MAX).bsearch { |i| i**2 > self } r.nil? ? SQRT_MAX : r - 1 end end struct Int64 SQRT_MAX = 3_037_000_499_i64 def isqrt r = (1_i64..SQRT_MAX).bsearch { |i| i**2 > self } r.nil? ? SQRT_MAX : r - 1 end end struct Float64 def near_zero? self.abs < EPSILON end end struct Number {% if compare_versions(env("CRYSTAL_VERSION") || "0.0.0", "1.1.0") < 0 %} def zero? self == 0 end def positive? self > 0 end def negative? self < 0 end {% end %} {% if compare_versions(env("CRYSTAL_VERSION") || "0.0.0", "0.36.0") < 0 %} def self.additive_identity zero end def self.multiplicative_identity new(1) end {% end %} end class Array macro new_md(*args, &block) {% if !block %} {% for arg, i in args[0...-2] %} Array.new({{arg}}) { {% end %} Array.new({{args[-2]}}, {{args[-1]}}) {% for arg in args[0...-2] %} } {% end %} {% else %} {% for arg, i in args %} Array.new({{arg}}) { |_i{{i}}| {% end %} {% for block_arg, i in block.args %} {{block_arg}} = _i{{i}} {% end %} {{block.body}} {% for arg in args %} } {% end %} {% end %} end end class ProconIO def initialize(@ins : IO = STDIN, @outs : IO = STDOUT) @buf = IO::Memory.new("") end def get(k : T.class = Int32) forall T get_v(k) end macro define_get {% for i in (2..9) %} def get({{ *(1..i).map { |j| "k#{j}".id } }}) { {{ *(1..i).map { |j| "get(k#{j})".id } }} } end {% end %} end define_get macro define_getn {% for i in (2..9) %} def get{{i}}(k : T.class = Int32) forall T get({{ *(1..i).map { "k".id } }}) end {% end %} end define_getn def get_a(n : Int, k : T.class = Int32) forall T Array.new(n) { get_v(k) } end def get_c(n : Int, k : T.class = Int32) forall T get_a(n, k) end macro define_get_c {% for i in (2..9) %} def get_c(n : Int, {{ *(1..i).map { |j| "k#{j}".id } }}) a = Array.new(n) { get({{ *(1..i).map { |j| "k#{j}".id } }}) } { {{ *(1..i).map { |j| "a.map { |e| e[#{j-1}] }".id } }} } end {% end %} end define_get_c macro define_getn_c {% for i in (2..9) %} def get{{i}}_c(n : Int, k : T.class = Int32) forall T get_c(n, {{ *(1..i).map { "k".id } }}) end {% end %} end define_getn_c def get_m(r : Int, c : Int, k : T.class = Int32) forall T Array.new(r) { get_a(c, k) } end macro define_put {% for i in (1..9) %} def put({{ *(1..i).map { |j| "v#{j}".id } }}, *, delimiter = " ") {% for j in (1..i) %} print_v(v{{j}}, delimiter) {% if j < i %}@outs << delimiter{% end %} {% end %} @outs.puts end {% end %} end define_put def put_e(*vs) put(*vs) exit end def put_f(*vs) put(*vs) @outs.flush end private def get_v(k : Int32.class); get_token.to_i32; end private def get_v(k : Int64.class); get_token.to_i64; end private def get_v(k : UInt32.class); get_token.to_u32; end private def get_v(k : UInt64.class); get_token.to_u64; end private def get_v(k : Float64.class); get_token.to_f64; end private def get_v(k : String.class); get_token; end private def get_token loop do token = @buf.gets(' ', chomp: true) break token unless token.nil? @buf = IO::Memory.new(@ins.read_line) end end private def print_v(v, dlimiter) @outs << v end private def print_v(v : Enumerable, delimiter) v.each_with_index do |e, i| @outs << e @outs << delimiter if i < v.size - 1 end end end macro min_u(a, b) {{a}} = Math.min({{a}}, {{b}}) end macro max_u(a, b) {{a}} = Math.max({{a}}, {{b}}) end macro zip(a, *b, &block) {{a}}.zip({{*b}}) {{block}} end class SegmentTree(T) def initialize(@n : Int32, @init : T = T.zero, &@compose : (T, T) -> T) @an = 1 << (@n - 1).bit_length @buf = Array.new(@an << 1, @init) propagate_all end def initialize(b : Array(T), @init : T = T.zero, &@compose : (T, T) -> T) @n = b.size @an = 1 << (@n - 1).bit_length @buf = Array.new(@an << 1, @init) @buf[@an, @n] = b propagate_all end def [](i : Int) @buf[i + @an] end def [](start : Int, count : Int) l, r = start + @an, start + count + @an r1 = r2 = @init while l != r if l.odd? r1 = @compose.call(r1, @buf[l]) l += 1 end if r.odd? r -= 1 r2 = @compose.call(@buf[r], r2) end l >>= 1 r >>= 1 end @compose.call(r1, r2) end def [](r : Range) sc = Indexable.range_to_index_and_count(r, @n) raise ArgumentError.new("Invalid range") if sc.nil? self[*sc] end def []=(i : Int, v : T) @buf[i + @an] = v propagate(i + @an) end @an : Int32 @buf : Array(T) private def propagate_all (1...@an).reverse_each do |i| @buf[i] = @compose.call(@buf[i << 1], @buf[i << 1 | 1]) end end private def propagate(i : Int) while (i >>= 1) > 0 @buf[i] = @compose.call(@buf[i << 1], @buf[i << 1 | 1]) end end end solve(ProconIO.new)