結果
問題 | No.875 Range Mindex Query |
ユーザー | universato |
提出日時 | 2020-05-29 09:15:08 |
言語 | Ruby (3.3.0) |
結果 |
AC
|
実行時間 | 917 ms / 2,000 ms |
コード長 | 2,707 bytes |
コンパイル時間 | 162 ms |
コンパイル使用メモリ | 7,552 KB |
実行使用メモリ | 24,192 KB |
最終ジャッジ日時 | 2024-10-14 09:19:18 |
合計ジャッジ時間 | 9,017 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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 | 90 ms
12,288 KB |
testcase_01 | AC | 96 ms
12,032 KB |
testcase_02 | AC | 95 ms
12,416 KB |
testcase_03 | AC | 92 ms
12,288 KB |
testcase_04 | AC | 93 ms
12,160 KB |
testcase_05 | AC | 92 ms
12,160 KB |
testcase_06 | AC | 97 ms
12,160 KB |
testcase_07 | AC | 96 ms
12,416 KB |
testcase_08 | AC | 93 ms
12,160 KB |
testcase_09 | AC | 93 ms
12,288 KB |
testcase_10 | AC | 95 ms
12,288 KB |
testcase_11 | AC | 917 ms
20,608 KB |
testcase_12 | AC | 749 ms
17,536 KB |
testcase_13 | AC | 662 ms
23,424 KB |
testcase_14 | AC | 662 ms
23,040 KB |
testcase_15 | AC | 873 ms
23,808 KB |
testcase_16 | AC | 754 ms
24,064 KB |
testcase_17 | AC | 805 ms
24,192 KB |
testcase_18 | AC | 790 ms
24,192 KB |
コンパイルメッセージ
Syntax OK
ソースコード
# 0-indexedで、getは半開区間であることに注意 class SegmentTree # O(n) def initialize(n, form) @form = form case form when "and" @identity_element = 2 ** n - 1 @func = Proc.new{|x, y| x & y } when "gcd" @identity_element = 0 @func = Proc.new{|x, y| x.gcd y } when "max" @identity_element = -( inf = 10 ** 12 ) @func = Proc.new{|x, y| x > y ? x : y } when "min" @identity_element = ( inf = 10 ** 12 ) @func = Proc.new{|x, y| x < y ? x : y } when "or" @identity_element = 0 @func = Proc.new{|x, y| x | y} when "prod" @identity_element = 1 @func = Proc.new{|x, y| x * y} when "sum" @identity_element = 1 @func = Proc.new{|x, y| x + y} end # @identity_element = identity_element @n = 1 @n *= 2 while @n < n # @n: leaf node size(2^k) # @n*2-1: tree node size @n_1 = @n - 1 @nodes = Array.new(@n*2-1){ @identity_element } end def update(i, val) # @n-1: inner node size i += @n_1 @nodes[i] = val while i > 0 i = ( i - 1 ) / 2 @nodes[i] = @func.call(@nodes[2*i+1], @nodes[2*i+2]) end true end def swap(i, j) # @n-1: inner node size n_i = @nodes[i + @n_1].dup n_j = @nodes[j + @n_1].dup update(i, n_j) update(j, n_i) end def get(l, r) l += @n_1 r += @n_1 lres, rres = @identity_element, @identity_element while l < r if l[0] == 0 lres = @func.call(lres, @nodes[l]) l += 1 end if r[0] == 0 r -= 1 rres = @func.call(rres, @nodes[r]) end l /= 2 r /= 2 end # p [lres, rres] return @func.call(lres, rres) end def build @n_1.downto(1) do |i| @nodes[i-1] = @func.call(@nodes[2*i-1], @nodes[2*i]) end end def [](k) @nodes[@n_1 + k] end def []=(i, val) @nodes[@n_1 + i] = val end def inspect t = 0 res = "SegmentTree\n " @nodes.each_with_index do |e,i| res << e.to_s << " " if t == i && i < @n_1 res << "\n " t = t * 2 + 2 end end res end end class Array def to_st(form) st = SegmentTree.new(size, form) each_with_index{ |t, i| st[i] = t } st.build st end end n, q = gets.to_s.split.map{|t| t.to_i } a = gets.to_s.split.map{|t| t.to_i } idx = Array.new(n+1) a.each_with_index{ |t, i| idx[t] = i } st = a.to_st("min") ans = [] q.times do x, l, r = gets.to_s.split.map{|t| t.to_i } l -= 1 r -= 1 if x == 1 idx[st[l]] = r idx[st[r]] = l st.swap(l, r) else ans << (idx[st.get(l, r+1)] + 1) end end puts ans