結果

問題 No.8011 品物の並び替え (Extra)
ユーザー rpy3cpp
提出日時 2015-05-04 04:33:10
言語 Python3
(3.13.1 + numpy 2.2.1 + scipy 1.14.1)
結果
AC  
実行時間 222 ms / 5,000 ms
コード長 1,336 bytes
コンパイル時間 86 ms
コンパイル使用メモリ 12,672 KB
実行使用メモリ 11,264 KB
最終ジャッジ日時 2024-07-05 18:51:36
合計ジャッジ時間 2,267 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
other AC * 9
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

import random
def read_data():
    N, M = map(int, input().split())
    score = [[0] * N for i in range(N)]
    for i in range(M):
        a, b, s = map(int, input().split())
        score[a][b] = s
    return N, M, score
def solve(N, M, score):
    sol = list(range(N))
    total = calc_score(sol, score)
    delta = 10**6
    r = 0.995
    record = total
    best_sol = sol[:]
    while int(delta):
        delta *= r
        a = random.randint(0, N-1)
        b = random.randint(0, N-1)
        if a == b:
            continue
        sol[a], sol[b] = sol[b], sol[a]
        new_total = calc_score(sol, score)
        if new_total + delta < total:
            sol[a], sol[b] = sol[b], sol[a]
        else:
            if new_total > record:
                record = new_total
                best_sol = sol[:]
            total = new_total
    return record, best_sol
def calc_score(sol, score):
    n = len(sol)
    total = 0
    for i in range(n-1):
        score_i = score[sol[i]]
        for j in range(i+1, n):
            total += score_i[sol[j]]
    return total
if __name__ == '__main__':
    N, M, score = read_data()
#    N, M = 50, 50 * 49
#    score = [[random.randint(0, 10000) for j in range(N)] for i in range(N)]
    total, solution = solve(N, M, score)
    print(total)
    print(' '.join(map(str, solution)))
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