from itertools import combinations import time import threading from collections import defaultdict import math from multiprocessing import Pool # 配置参数(优化阈值) TARGET = 155896 # 目标值 BASE_VALUES = [36.5, 41.5, 59, 68.5, 74, 91.5] # 基础系数列表 FLUCTUATION = 1.0 # 系数波动范围 MAX_SOLUTIONS = 3 # 每个组合的最大解数量 SOLVER_TIMEOUT = 180 # 求解超时时间(秒) THREE_VAR_THRESHOLD = 260000 # 使用三个变量的阈值 PRODUCT_RANGE_THRESHOLD = 130000 # 乘积范围限制阈值 HIGH_TARGET_THRESHOLD = 260000 # 更高目标值阈值 SHOW_PROGRESS = True # 是否显示进度 MAX_SOLUTIONS_PER_COMB = 100 # 每个组合的最大解数量,用于提前终止 USE_MULTIPROCESSING = True # 是否使用多进程加速 def is_valid_product(p): """确保单个乘积不超过129000""" return p <= 129000 # 严格限制所有乘积不超过129000 def find_single_variable_solutions(values): """查找单个数的解(a*x = TARGET)""" solutions = [] for a in values: quotient = TARGET / a if quotient != int(quotient): continue x = int(quotient) if 1 <= x <= 10000 and is_valid_product(a * x): solutions.append((a, x)) if len(solutions) >= MAX_SOLUTIONS: break return solutions def find_two_variable_solutions(values): """优化的双变量求解算法,确保每个乘积不超过129000""" solutions = defaultdict(list) for i, a in enumerate(values): for b in values[i:]: seen_xy = set() # 调整x的最大值,确保a*x不超过129000 if max_x < min_x: continue x_count = max_x - min_x + 1 x_step = max(1, x_count // 1000) for x in range(min_x, max_x + 1, x_step): ax = a * x if ax > 129000: # 额外检查确保不超过129000 continue remainder = TARGET - ax if remainder < b: break if remainder > b * 10000: continue if remainder % b == 0: y = remainder // b by = b * y if 1 <= y <= 10000 and by <= 129000: # 确保b*y也不超过129000 xy_pair = (x, y) if a <= b else (y, x) if xy_pair not in seen_xy: seen_xy.add(xy_pair) solutions[(a, b)].append((a, x, b, y)) if len(solutions[(a, b)]) >= MAX_SOLUTIONS_PER_COMB: break return solutions def process_three_var_combination(args): """处理三变量组合的辅助函数,用于并行计算""" a, b, c, value_ranges, target = args solutions = [] seen_xyz = set() min_x, max_x = value_ranges[a] x_count = max_x - min_x + 1 x_step = max(1, x_count // 1000) for x in range(min_x, max_x + 1, x_step): ax = a * x if not is_valid_product(ax): continue remainder1 = target - ax if remainder1 < 0: break if max_y < min_y: continue y_count = max_y - min_y + 1 y_step = max(1, y_count // 100) for y in range(min_y, max_y + 1, y_step): by = b * y if not is_valid_product(by): continue remainder2 = remainder1 - by if remainder2 < 0: break if remainder2 > c * 10000: continue if remainder2 % c == 0: z = remainder2 // c if 1 <= z <= 10000 and is_valid_product(c * z): xyz_tuple = tuple(sorted([x, y, z])) if xyz_tuple not in seen_xyz: seen_xyz.add(xyz_tuple) solutions.append((a, x, b, y, c, z)) if len(solutions) >= MAX_SOLUTIONS_PER_COMB: return solutions return solutions def find_three_variable_solutions(values): """优化的三变量求解算法,确保每个乘积不超过129000""" solutions = defaultdict(list) sorted_values = sorted(values) # 预计算每个系数的有效范围,确保每个乘积不超过129000 value_ranges = {} for a in sorted_values: value_ranges[a] = (min_x, max_x) combinations_list = [] for i, a in enumerate(sorted_values): for j in range(i + 1, len(sorted_values)): b = sorted_values[j] for k in range(j + 1, len(sorted_values)): c = sorted_values[k] combinations_list.append((a, b, c, value_ranges, TARGET)) if USE_MULTIPROCESSING: with Pool() as pool: results = pool.map(process_three_var_combination, combinations_list) for i, (a, b, c, _, _) in enumerate(combinations_list): if results[i]: solutions[(a, b, c)] = results[i] else: total_combinations = len(combinations_list) for i, (a, b, c, _, _) in enumerate(combinations_list): res = process_three_var_combination((a, b, c, value_ranges, TARGET)) if res: solutions[(a, b, c)] = res if SHOW_PROGRESS and i % 10 == 0: print(f"\r三变量组合进度: {i}/{total_combinations} 组", end='') if SHOW_PROGRESS and not USE_MULTIPROCESSING: print(f"\r三变量组合进度: {total_combinations}/{total_combinations} 组 - 完成") return solutions def find_balanced_solutions(solutions, var_count, num=2): """从所有解中筛选出最平衡的解""" if var_count == 1 or not solutions: return solutions balanced = [] for sol in solutions: vars = sol[1::2] # 获取解中的变量值 diff = max(vars) - min(vars) # 计算变量之间的最大差值 balanced.append((diff, sol)) # 按差值排序,返回差值最小的解 return [s for _, s in sorted(balanced, key=lambda x: x[0])[:num]] def find_original_solutions(solutions, balanced_solutions, num=3): """从剩余解中获取原始顺序的解""" if not solutions: return [] remaining = [s for s in solutions if s not in balanced_solutions] return remaining[:num] def display_solutions(solutions_dict, var_count): """优化的解显示函数""" if not solutions_dict: return print(f"\n找到 {len(solutions_dict)} 组{var_count}变量解:") for i, (coeffs, pair_solutions) in enumerate(sorted(solutions_dict.items()), 1): balanced = find_balanced_solutions(pair_solutions, var_count) original = find_original_solutions(pair_solutions, balanced) all_display = balanced + original if var_count == 1: a = coeffs print(f"\n{i}. 组合: a={a} ({len(pair_solutions)} 个有效解)") elif var_count == 2: a, b = coeffs print(f"\n{i}. 组合: a={a}, b={b} ({len(pair_solutions)} 个有效解)") else: a, b, c = coeffs print(f"\n{i}. 组合: a={a}, b={b}, c={c} ({len(pair_solutions)} 个有效解)") for j, sol in enumerate(all_display, 1): tag = "[平衡解]" if j <= len(balanced) else "[原始解]" if var_count == 1: a, x = sol print(f" {j}. x={x}, a*x={a*x:.1f}, 总和={a*x:.1f} {tag}") elif var_count == 2: a, x, b, y = sol print(f" {j}. x={x}, y={y}, a*x={a*x:.1f}, b*y={b*y:.1f}, 总和={a*x + b*y:.1f} {tag}") else: a, x, b, y, c, z = sol print(f" {j}. x={x}, y={y}, z={z}, " f"a*x={a*x:.1f}, b*y={b*y:.1f}, c*z={c*z:.1f}, " f"总和={a*x + b*y + c*z:.1f} {tag}") def run_with_timeout(func, args=(), kwargs=None, timeout=SOLVER_TIMEOUT): """运行函数并设置超时限制""" if kwargs is None: kwargs = {} result = [] error = [] def wrapper(): try: result.append(func(*args, **kwargs)) except Exception as e: error.append(e) thread = threading.Thread(target=wrapper) thread.daemon = True thread.start() thread.join(timeout) if thread.is_alive(): print(f"警告: {func.__name__} 超时({timeout}秒),跳过此方法") return None if error: return result[0] def main(): print(f"目标值: {TARGET}") # 生成波动后的系数 FLUCTUATED_VALUES = [round(v - FLUCTUATION, 1) for v in BASE_VALUES] # 尝试基础系数 print(f"\n==== 尝试基础系数 ====") # 目标值255966 > 259000不成立,会按顺序尝试单、双、三变量解 base_solutions = { 'single': run_with_timeout(find_single_variable_solutions, args=(BASE_VALUES,)), 'two': run_with_timeout(find_two_variable_solutions, args=(BASE_VALUES,)), 'three': [] } has_solution = False # 显示单变量解 if base_solutions['single']: has_solution = True display_solutions({a: [sol] for a, sol in zip(BASE_VALUES, base_solutions['single']) if sol}, 1) # 显示双变量解 if base_solutions['two'] and len(base_solutions['two']) > 0: has_solution = True display_solutions(base_solutions['two'], 2) # 单变量和双变量都无解时,尝试三变量解 if not has_solution: print(f"\n==== 单变量和双变量无解,尝试三变量解 ====") base_solutions['three'] = run_with_timeout(find_three_variable_solutions, args=(BASE_VALUES,)) if base_solutions['three'] and len(base_solutions['three']) > 0: has_solution = True display_solutions(base_solutions['three'], 3) if has_solution: print(f"\n使用基础系数列表,共找到有效解") return # 如果基础系数没有找到解,尝试波动系数 print(f"\n==== 尝试波动系数 ====") fluctuated_solutions = { 'single': run_with_timeout(find_single_variable_solutions, args=(FLUCTUATED_VALUES,)), 'two': run_with_timeout(find_two_variable_solutions, args=(FLUCTUATED_VALUES,)), 'three': [] } has_solution = False # 显示单变量解 if fluctuated_solutions['single']: has_solution = True display_solutions({a: [sol] for a, sol in zip(FLUCTUATED_VALUES, fluctuated_solutions['single']) if sol}, 1) # 显示双变量解 if fluctuated_solutions['two'] and len(fluctuated_solutions['two']) > 0: has_solution = True display_solutions(fluctuated_solutions['two'], 2) # 单变量和双变量都无解时,尝试三变量解 if not has_solution: print(f"\n==== 单变量和双变量无解,尝试三变量解 ====") fluctuated_solutions['three'] = run_with_timeout(find_three_variable_solutions, args=(FLUCTUATED_VALUES,)) if fluctuated_solutions['three'] and len(fluctuated_solutions['three']) > 0: has_solution = True display_solutions(fluctuated_solutions['three'], 3) if has_solution: print(f"\n使用波动系数列表,共找到有效解") return # 如果所有系数集都没有找到解 print("\n没有找到符合条件的解,即使使用波动后的系数列表。") if __name__ == "__main__": main() print(f"\n总耗时: {time.time() - start_time:.2f}秒")
Standard input is empty
目标值: 155896 ==== 尝试基础系数 ==== 找到 13 组2变量解: 1. 组合: a=36.5, b=41.5 (11 个有效解) 1. x=1888, y=2096.0, a*x=68912.0, b*y=86984.0, 总和=155896.0 [平衡解] 2. x=2137, y=1877.0, a*x=78000.5, b*y=77895.5, 总和=155896.0 [平衡解] 3. x=892, y=2972.0, a*x=32558.0, b*y=123338.0, 总和=155896.0 [原始解] 4. x=1141, y=2753.0, a*x=41646.5, b*y=114249.5, 总和=155896.0 [原始解] 5. x=1390, y=2534.0, a*x=50735.0, b*y=105161.0, 总和=155896.0 [原始解] 2. 组合: a=36.5, b=59 (8 个有效解) 1. x=1486, y=1723.0, a*x=54239.0, b*y=101657.0, 总和=155896.0 [平衡解] 2. x=1840, y=1504.0, a*x=67160.0, b*y=88736.0, 总和=155896.0 [平衡解] 3. x=778, y=2161.0, a*x=28397.0, b*y=127499.0, 总和=155896.0 [原始解] 4. x=1132, y=1942.0, a*x=41318.0, b*y=114578.0, 总和=155896.0 [原始解] 5. x=2194, y=1285.0, a*x=80081.0, b*y=75815.0, 总和=155896.0 [原始解] 3. 组合: a=36.5, b=68.5 (7 个有效解) 1. x=1396, y=1532.0, a*x=50954.0, b*y=104942.0, 总和=155896.0 [平衡解] 2. x=1807, y=1313.0, a*x=65955.5, b*y=89940.5, 总和=155896.0 [平衡解] 3. x=985, y=1751.0, a*x=35952.5, b*y=119943.5, 总和=155896.0 [原始解] 4. x=2218, y=1094.0, a*x=80957.0, b*y=74939.0, 总和=155896.0 [原始解] 5. x=2629, y=875.0, a*x=95958.5, b*y=59937.5, 总和=155896.0 [原始解] 4. 组合: a=36.5, b=74 (7 个有效解) 1. x=1228, y=1501.0, a*x=44822.0, b*y=111074.0, 总和=155896.0 [平衡解] 2. x=1672, y=1282.0, a*x=61028.0, b*y=94868.0, 总和=155896.0 [平衡解] 3. x=784, y=1720.0, a*x=28616.0, b*y=127280.0, 总和=155896.0 [原始解] 4. x=2116, y=1063.0, a*x=77234.0, b*y=78662.0, 总和=155896.0 [原始解] 5. x=2560, y=844.0, a*x=93440.0, b*y=62456.0, 总和=155896.0 [原始解] 5. 组合: a=41.5, b=59 (7 个有效解) 1. x=1624, y=1500.0, a*x=67396.0, b*y=88500.0, 总和=155896.0 [平衡解] 2. x=1270, y=1749.0, a*x=52705.0, b*y=103191.0, 总和=155896.0 [平衡解] 3. x=916, y=1998.0, a*x=38014.0, b*y=117882.0, 总和=155896.0 [原始解] 4. x=1978, y=1251.0, a*x=82087.0, b*y=73809.0, 总和=155896.0 [原始解] 5. x=2332, y=1002.0, a*x=96778.0, b*y=59118.0, 总和=155896.0 [原始解] 6. 组合: a=41.5, b=68.5 (6 个有效解) 1. x=1345, y=1461.0, a*x=55817.5, b*y=100078.5, 总和=155896.0 [平衡解] 2. x=1756, y=1212.0, a*x=72874.0, b*y=83022.0, 总和=155896.0 [平衡解] 3. x=934, y=1710.0, a*x=38761.0, b*y=117135.0, 总和=155896.0 [原始解] 4. x=2167, y=963.0, a*x=89930.5, b*y=65965.5, 总和=155896.0 [原始解] 5. x=2578, y=714.0, a*x=106987.0, b*y=48909.0, 总和=155896.0 [原始解] 7. 组合: a=41.5, b=74 (5 个有效解) 1. x=1360, y=1344.0, a*x=56440.0, b*y=99456.0, 总和=155896.0 [平衡解] 2. x=916, y=1593.0, a*x=38014.0, b*y=117882.0, 总和=155896.0 [平衡解] 3. x=1804, y=1095.0, a*x=74866.0, b*y=81030.0, 总和=155896.0 [原始解] 4. x=2248, y=846.0, a*x=93292.0, b*y=62604.0, 总和=155896.0 [原始解] 5. x=2692, y=597.0, a*x=111718.0, b*y=44178.0, 总和=155896.0 [原始解] 8. 组合: a=41.5, b=91.5 (13 个有效解) 1. x=1135, y=1189.0, a*x=47102.5, b*y=108793.5, 总和=155896.0 [平衡解] 2. x=1318, y=1106.0, a*x=54697.0, b*y=101199.0, 总和=155896.0 [平衡解] 3. x=769, y=1355.0, a*x=31913.5, b*y=123982.5, 总和=155896.0 [原始解] 4. x=952, y=1272.0, a*x=39508.0, b*y=116388.0, 总和=155896.0 [原始解] 5. x=1501, y=1023.0, a*x=62291.5, b*y=93604.5, 总和=155896.0 [原始解] 9. 组合: a=59, b=68.5 (7 个有效解) 1. x=1335, y=1126.0, a*x=78765.0, b*y=77131.0, 总和=155896.0 [平衡解] 2. x=1061, y=1362.0, a*x=62599.0, b*y=93297.0, 总和=155896.0 [平衡解] 3. x=513, y=1834.0, a*x=30267.0, b*y=125629.0, 总和=155896.0 [原始解] 4. x=787, y=1598.0, a*x=46433.0, b*y=109463.0, 总和=155896.0 [原始解] 5. x=1609, y=890.0, a*x=94931.0, b*y=60965.0, 总和=155896.0 [原始解] 10. 组合: a=59, b=91.5 (4 个有效解) 1. x=1169, y=950.0, a*x=68971.0, b*y=86925.0, 总和=155896.0 [平衡解] 2. x=803, y=1186.0, a*x=47377.0, b*y=108519.0, 总和=155896.0 [平衡解] 3. x=1535, y=714.0, a*x=90565.0, b*y=65331.0, 总和=155896.0 [原始解] 4. x=1901, y=478.0, a*x=112159.0, b*y=43737.0, 总和=155896.0 [原始解] 11. 组合: a=68.5, b=74 (10 个有效解) 1. x=1040, y=1144.0, a*x=71240.0, b*y=84656.0, 总和=155896.0 [平衡解] 2. x=1188, y=1007.0, a*x=81378.0, b*y=74518.0, 总和=155896.0 [平衡解] 3. x=448, y=1692.0, a*x=30688.0, b*y=125208.0, 总和=155896.0 [原始解] 4. x=596, y=1555.0, a*x=40826.0, b*y=115070.0, 总和=155896.0 [原始解] 5. x=744, y=1418.0, a*x=50964.0, b*y=104932.0, 总和=155896.0 [原始解] 12. 组合: a=68.5, b=91.5 (8 个有效解) 1. x=892, y=1036.0, a*x=61102.0, b*y=94794.0, 总和=155896.0 [平衡解] 2. x=1075, y=899.0, a*x=73637.5, b*y=82258.5, 总和=155896.0 [平衡解] 3. x=526, y=1310.0, a*x=36031.0, b*y=119865.0, 总和=155896.0 [原始解] 4. x=709, y=1173.0, a*x=48566.5, b*y=107329.5, 总和=155896.0 [原始解] 5. x=1258, y=762.0, a*x=86173.0, b*y=69723.0, 总和=155896.0 [原始解] 13. 组合: a=74, b=91.5 (7 个有效解) 1. x=890, y=984.0, a*x=65860.0, b*y=90036.0, 总和=155896.0 [平衡解] 2. x=1073, y=836.0, a*x=79402.0, b*y=76494.0, 总和=155896.0 [平衡解] 3. x=524, y=1280.0, a*x=38776.0, b*y=117120.0, 总和=155896.0 [原始解] 4. x=707, y=1132.0, a*x=52318.0, b*y=103578.0, 总和=155896.0 [原始解] 5. x=1256, y=688.0, a*x=92944.0, b*y=62952.0, 总和=155896.0 [原始解] 使用基础系数列表,共找到有效解 总耗时: 0.01秒