結果
| 問題 |
No.5007 Steiner Space Travel
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-07-30 17:49:18 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 971 ms / 1,000 ms |
| コード長 | 2,360 bytes |
| コンパイル時間 | 281 ms |
| 実行使用メモリ | 87,124 KB |
| スコア | 5,935,673 |
| 最終ジャッジ日時 | 2022-07-30 17:50:06 |
| 合計ジャッジ時間 | 32,299 ms |
|
ジャッジサーバーID (参考情報) |
judge12 / judge11 |
| 純コード判定しない問題か言語 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 30 |
ソースコード
import sys
import time
import random
from heapq import heapify, heappush, heappop
input = lambda: sys.stdin.readline().rstrip()
# ----------------------- #
n, m = map(int, input().split())
ab = [tuple(map(int, input().split())) for _ in range(n)]
ab_set = set(ab)
ALP = 5
ALP2 = 25
LIMIT = 0.86
START = time.time()
def calc_score(root):
ans = 0
E = []
for i in range(1, n):
u, v = root[i][1]-1, root[i-1][1]-1
tmp = (ab[u][0] - ab[v][0])*(ab[u][0] - ab[v][0]) + (ab[u][1] - ab[v][1])*(ab[u][1] - ab[v][1])
heappush(E, (tmp, i))
if len(E) > 8:
heappop(E)
ans += ALP2 * tmp
v = root[-1][1]
tmp = (ab[0][0] - ab[v][0])*(ab[0][0] - ab[v][0]) + (ab[0][1] - ab[v][1])*(ab[0][1] - ab[v][1])
ans += ALP2 * tmp
heappush(E, (tmp, n))
if len(E) > 8:
heappop(E)
stations = []
E.sort(key=lambda x: x[1])
for c,i in E:
if i == n:
v = root[-1][1]-1
stations.append(((ab[0][0] + ab[v][0])>>1, (ab[0][1] + ab[v][1])>>1))
ans -= c * ALP2
ans += c * ALP
else:
u, v = root[i][1]-1, root[i-1][1]-1
stations.append(((ab[u][0] + ab[v][0])>>1, (ab[u][1] + ab[v][1])>>1))
ans -= c * ALP2
ans += c * ALP
for i in range(8):
if E[i][1] + i > len(root):
root.append((E[i][1]+i, (2, i+1, 0)))
else:
root.insert(E[i][1]+i, (2, i+1, 0))
return root, stations, ans
def make_stations():
stations = []
return stations
def make_root():
C = [(1, i, ab[i-1]) for i in range(2, n+1)]
c = []
d1 = random.randint(10, 300)
d2 = random.randint(10, 300)
a, b = list(range(1000//d1 + 3)), list(range(1000//d2 + 3))
i = random.randint(0, len(a))
a = a[i:] + a[:i]
b = b[i:] + b[:i]
for i in a:
b = b[::-1]
for j in b:
tmp = []
for k in C:
if d1*i <= k[2][0] <= d1*(i+1) and d2*j <= k[2][1] <= d2*(j+1):
tmp.append(k)
for t in tmp:
C.remove(t)
tmp.sort(key=lambda x: sum(x[2]))
c.extend(tmp)
return [(1, 1, 0)] + c
vestscore = float('inf')
st, ro = [], []
while time.time() - START < LIMIT:
root = make_root()
try:
root, stations, score = calc_score(root)
if score < vestscore:
vestscore = score
st = stations[:]
ro = root[:]
except IndexError:
pass
for i,j in st:
print(i, j)
print(len(ro)+1)
for i,j,_ in ro:
print(i, j)
print(1, 1)