結果

問題 No.845 最長の切符
ユーザー te-sh
提出日時 2021-07-07 17:21:36
言語 Crystal
(1.14.0)
結果
AC  
実行時間 76 ms / 3,000 ms
コード長 4,753 bytes
コンパイル時間 13,530 ms
コンパイル使用メモリ 299,792 KB
実行使用メモリ 11,520 KB
最終ジャッジ日時 2024-07-01 12:22:12
合計ジャッジ時間 14,967 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 27
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

def solve(io)
n, m = io.get2
g = Array.new_md(n, n, 0)
m.times do
ai, bi, ci = io.get3; ai -= 1; bi -= 1
max_u(g[ai][bi], ci)
max_u(g[bi][ai], ci)
end
dp = Array.new_md(1 << n, n, 0)
(1 << n).times do |s|
n.times do |i|
next if s.popcount <= 1 || s.bit(i) != 1
n.times do |j|
next if g[i][j] == 0 || s.bit(j) != 1
max_u(dp[s][i], dp[s.bit_reset(i)][j] + g[i][j])
end
end
end
io.put dp.map(&.max).max
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
struct Int
def cdiv(b : Int)
(self + b - 1) // b
end
def bit_set(i : Int)
self | (self.class.new(1) << i)
end
def bit_reset(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 Number
{% 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 ProconIO
def initialize(@ins : IO = STDIN, @outs : IO = STDOUT)
@buf = [] of String
@index = 0
end
def get(k : T.class = Int32) forall T
get_v(k)
end
macro define_get
{% for i in (2..9) %}
def get(
{% for j in (1..i) %}
k{{j}}{% if j < i %},{% end %}
{% end %}
)
{
{% for j in (1..i) %}
get(k{{j}}){% if j < i %},{% end %}
{% end %}
}
end
{% end %}
end
define_get
macro define_getn
{% for i in (2..9) %}
def get{{i}}(k : T.class = Int32) forall T
get(
{% for j in (1..i) %}
k{% if j < i %}, {% end %}
{% end %}
)
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,
{% for j in (1..i) %}
k{{j}}{% if j < i %},{% end %}
{% end %}
)
a = Array.new(n) do
get(
{% for j in (1..i) %}
k{{j}}{% if j < i %},{% end %}
{% end %}
)
end
{
{% for j in (1..i) %}
a.map { |e| e[{{j-1}}] }{% if j < i %},{% end %}
{% end %}
}
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,
{% for j in (1..i) %}
k{% if j < i %}, {% end %}
{% end %}
)
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
def put(*vs)
vs.each.with_index do |v, i|
put_v(v)
@outs.print i < vs.size - 1 ? " " : "\n"
end
end
def put_e(*vs)
put(*vs)
exit
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 : String.class); get_token; end
private def get_token
if @buf.size == @index
str = @ins.read_line
@buf = str.split
@index = 0
end
v = @buf[@index]
@index += 1
v
end
private def put_v(vs : Enumerable)
vs.each_with_index do |v, i|
@outs.print v
@outs.print " " if i < vs.size - 1
end
end
private def put_v(v)
@outs.print v
end
end
macro min_u(a, b)
{{a}} = Math.min({{a}}, {{b}})
end
macro max_u(a, b)
{{a}} = Math.max({{a}}, {{b}})
end
solve(ProconIO.new)
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