結果
問題 | No.5020 Averaging |
ユーザー | Ang1077 |
提出日時 | 2024-02-25 14:06:03 |
言語 | PyPy3 (7.3.15) |
結果 |
TLE
|
実行時間 | - |
コード長 | 4,083 bytes |
コンパイル時間 | 304 ms |
コンパイル使用メモリ | 81,700 KB |
実行使用メモリ | 371,964 KB |
スコア | 0 |
最終ジャッジ日時 | 2024-02-25 14:06:23 |
合計ジャッジ時間 | 4,933 ms |
ジャッジサーバーID (参考情報) |
judge10 / judge11 |
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テストケース
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testcase_00 | TLE | - |
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ソースコード
import sys from collections import deque, defaultdict from itertools import ( accumulate, product, permutations, combinations, combinations_with_replacement, ) import math from bisect import bisect_left, insort_left, bisect_right, insort_right from pprint import pprint from heapq import heapify, heappop, heappush import string # 小文字アルファベットのリスト alph_s = list(string.ascii_lowercase) # 大文字アルファベットのリスト alph_l = list(string.ascii_uppercase) # product : bit全探索 product(range(2),repeat=n) # permutations : 順列全探索 # combinations : 組み合わせ(重複無し) # combinations_with_replacement : 組み合わせ(重複可) # from sortedcontainers import SortedSet, SortedList, SortedDict sys.setrecursionlimit(10**7) around4 = ((-1, 0), (1, 0), (0, -1), (0, 1)) # 上下左右 around8 = ((-1, -1), (-1, 0), (-1, 1), (0, -1), (0, 1), (1, -1), (1, 0), (1, 1)) inf = float("inf") mod = 998244353 input = lambda: sys.stdin.readline().rstrip() P = lambda *x: print(*x) PY = lambda: print("Yes") PN = lambda: print("No") II = lambda: int(input()) MII = lambda: map(int, input().split()) LMII = lambda: list(map(int, input().split())) def dlist(*l, fill=0): if len(l) == 1: return [fill] * l[0] ll = l[1:] return [dlist(*ll, fill=fill) for _ in range(l[0])] # 入力 def Input(): global N, A, B, St St = 5 * 10**17 N = II() A = [0] * N B = [0] * N for i in range(N): A[i], B[i] = MII() def solve(): ans = beam() ans = [(i + 1, j + 1) for i, j in ans] A_n, B_n = get_A_B(ans) tmp = get_ans(A_n, B_n, ans) for i in tmp: ans.append(i) return ans def get_A_B(ans): A_n = A[:] B_n = B[:] for i, j in ans: A_n[i], A_n[j] = (A[i] + A[j]) // 2, (A[i] + A[j]) // 2 B_n[i], B_n[j] = (B[i] + B[j]) // 2, (B[i] + B[j]) // 2 return A_n, B_n def get_ans(A, B, ans_prv): ans_list = [] for _ in range(50 - len(ans_prv)): score = abs(St - A[0]) + abs(St - B[0]) tmp = score ans = None for j in range(1, 45): a, b = (A[0] + A[j]) // 2, (B[0] + B[j]) // 2 if abs(St - a) + abs(St - b) < tmp: tmp = abs(St - a) + abs(St - b) ans = j if ans: ans_list.append([1, ans + 1]) A[0], A[ans] = (A[0] + A[ans]) // 2, (A[0] + A[ans]) // 2 B[0], B[ans] = (B[0] + B[ans]) // 2, (B[0] + B[ans]) // 2 else: break return ans_list def beam(): target_a, target_b = St - (A[0] - St), St - (B[0] - St) depth = 40 width = 100 heap = [] for i in range(0, 45): for j in range(i + 1, 45): a, b = (A[i] + A[j]) // 2, (B[i] + B[j]) // 2 if i == 0: heappush(heap, (abs(St - a) + abs(St - b), [(i, j)])) else: heappush(heap, (abs(target_a - a) + abs(target_b - b), [(i, j)])) for idx in range(depth): new_heap = [] while heap: score, ans = heappop(heap) A_n, B_n = get_A_B(ans) target_a, target_b = St - (A_n[0] - St), St - (B_n[0] - St) for i in range(0, 45): for j in range(i + 1, 45): a, b = (A_n[i] + A_n[j]) // 2, (B_n[i] + B_n[j]) // 2 ans_n = ans[:] ans_n.append((i, j)) if i == 0: heappush(new_heap, (abs(St - a) + abs(St - b), ans_n)) else: heappush( new_heap, (abs(target_a - a) + abs(target_b - b), ans_n) ) for _ in range(width): heappush(heap, heappop(new_heap)) if len(new_heap) == 0: break _, ans = heappop(heap) return ans # 出力 def Output(ans): print(len(ans)) for i in ans: print(*i) def main(): Input() Output(solve()) if __name__ == "__main__": main()