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 = 109836 # 目标值 BASE_VALUES = [38.5,44,61,70.5,75.5,93] # 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 = 259000 # 使用三个变量的阈值 PRODUCT_RANGE_THRESHOLD = 129000 # 乘积范围限制阈值 HIGH_TARGET_THRESHOLD = 259000 # 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: 109836 ==== 尝试基础系数 ==== 找到 12 组2变量解: 1. 组合: a=38.5, b=70.5 (10 个有效解) 1. x=921, y=1055.0, a*x=35458.5, b*y=74377.5, 总和=109836.0 [平衡解] 2. x=1203, y=901.0, a*x=46315.5, b*y=63520.5, 总和=109836.0 [平衡解] 3. x=75, y=1517.0, a*x=2887.5, b*y=106948.5, 总和=109836.0 [原始解] 4. x=357, y=1363.0, a*x=13744.5, b*y=96091.5, 总和=109836.0 [原始解] 5. x=639, y=1209.0, a*x=24601.5, b*y=85234.5, 总和=109836.0 [原始解] 2. 组合: a=38.5, b=75.5 (10 个有效解) 1. x=1035, y=927.0, a*x=39847.5, b*y=69988.5, 总和=109836.0 [平衡解] 2. x=733, y=1081.0, a*x=28220.5, b*y=81615.5, 总和=109836.0 [平衡解] 3. x=129, y=1389.0, a*x=4966.5, b*y=104869.5, 总和=109836.0 [原始解] 4. x=431, y=1235.0, a*x=16593.5, b*y=93242.5, 总和=109836.0 [原始解] 5. x=1337, y=773.0, a*x=51474.5, b*y=58361.5, 总和=109836.0 [原始解] 3. 组合: a=44, b=61 (21 个有效解) 1. x=999, y=1080, a*x=43956.0, b*y=65880.0, 总和=109836.0 [平衡解] 2. x=1121, y=992, a*x=49324.0, b*y=60512.0, 总和=109836.0 [平衡解] 3. x=23, y=1784, a*x=1012.0, b*y=108824.0, 总和=109836.0 [原始解] 4. x=145, y=1696, a*x=6380.0, b*y=103456.0, 总和=109836.0 [原始解] 5. x=267, y=1608, a*x=11748.0, b*y=98088.0, 总和=109836.0 [原始解] 4. 组合: a=44, b=70.5 (9 个有效解) 1. x=1035, y=912.0, a*x=45540.0, b*y=64296.0, 总和=109836.0 [平衡解] 2. x=753, y=1088.0, a*x=33132.0, b*y=76704.0, 总和=109836.0 [平衡解] 3. x=189, y=1440.0, a*x=8316.0, b*y=101520.0, 总和=109836.0 [原始解] 4. x=471, y=1264.0, a*x=20724.0, b*y=89112.0, 总和=109836.0 [原始解] 5. x=1317, y=736.0, a*x=57948.0, b*y=51888.0, 总和=109836.0 [原始解] 5. 组合: a=44, b=75.5 (8 个有效解) 1. x=849, y=960.0, a*x=37356.0, b*y=72480.0, 总和=109836.0 [平衡解] 2. x=1151, y=784.0, a*x=50644.0, b*y=59192.0, 总和=109836.0 [平衡解] 3. x=245, y=1312.0, a*x=10780.0, b*y=99056.0, 总和=109836.0 [原始解] 4. x=547, y=1136.0, a*x=24068.0, b*y=85768.0, 总和=109836.0 [原始解] 5. x=1453, y=608.0, a*x=63932.0, b*y=45904.0, 总和=109836.0 [原始解] 6. 组合: a=44, b=93 (13 个有效解) 1. x=873, y=768, a*x=38412.0, b*y=71424.0, 总和=109836.0 [平衡解] 2. x=687, y=856, a*x=30228.0, b*y=79608.0, 总和=109836.0 [平衡解] 3. x=129, y=1120, a*x=5676.0, b*y=104160.0, 总和=109836.0 [原始解] 4. x=315, y=1032, a*x=13860.0, b*y=95976.0, 总和=109836.0 [原始解] 5. x=501, y=944, a*x=22044.0, b*y=87792.0, 总和=109836.0 [原始解] 7. 组合: a=61, b=70.5 (13 个有效解) 1. x=876, y=800.0, a*x=53436.0, b*y=56400.0, 总和=109836.0 [平衡解] 2. x=735, y=922.0, a*x=44835.0, b*y=65001.0, 总和=109836.0 [平衡解] 3. x=30, y=1532.0, a*x=1830.0, b*y=108006.0, 总和=109836.0 [原始解] 4. x=171, y=1410.0, a*x=10431.0, b*y=99405.0, 总和=109836.0 [原始解] 5. x=312, y=1288.0, a*x=19032.0, b*y=90804.0, 总和=109836.0 [原始解] 8. 组合: a=61, b=75.5 (12 个有效解) 1. x=803, y=806.0, a*x=48983.0, b*y=60853.0, 总和=109836.0 [平衡解] 2. x=954, y=684.0, a*x=58194.0, b*y=51642.0, 总和=109836.0 [平衡解] 3. x=48, y=1416.0, a*x=2928.0, b*y=106908.0, 总和=109836.0 [原始解] 4. x=199, y=1294.0, a*x=12139.0, b*y=97697.0, 总和=109836.0 [原始解] 5. x=350, y=1172.0, a*x=21350.0, b*y=88486.0, 总和=109836.0 [原始解] 9. 组合: a=61, b=93 (19 个有效解) 1. x=741, y=695, a*x=45201.0, b*y=64635.0, 总和=109836.0 [平衡解] 2. x=648, y=756, a*x=39528.0, b*y=70308.0, 总和=109836.0 [平衡解] 3. x=90, y=1122, a*x=5490.0, b*y=104346.0, 总和=109836.0 [原始解] 4. x=183, y=1061, a*x=11163.0, b*y=98673.0, 总和=109836.0 [原始解] 5. x=276, y=1000, a*x=16836.0, b*y=93000.0, 总和=109836.0 [原始解] 10. 组合: a=70.5, b=75.5 (10 个有效解) 1. x=713, y=789.0, a*x=50266.5, b*y=59569.5, 总和=109836.0 [平衡解] 2. x=864, y=648.0, a*x=60912.0, b*y=48924.0, 总和=109836.0 [平衡解] 3. x=109, y=1353.0, a*x=7684.5, b*y=102151.5, 总和=109836.0 [原始解] 4. x=260, y=1212.0, a*x=18330.0, b*y=91506.0, 总和=109836.0 [原始解] 5. x=411, y=1071.0, a*x=28975.5, b*y=80860.5, 总和=109836.0 [原始解] 11. 组合: a=70.5, b=93 (26 个有效解) 1. x=686, y=661.0, a*x=48363.0, b*y=61473.0, 总和=109836.0 [平衡解] 2. x=624, y=708.0, a*x=43992.0, b*y=65844.0, 总和=109836.0 [平衡解] 3. x=4, y=1178.0, a*x=282.0, b*y=109554.0, 总和=109836.0 [原始解] 4. x=66, y=1131.0, a*x=4653.0, b*y=105183.0, 总和=109836.0 [原始解] 5. x=128, y=1084.0, a*x=9024.0, b*y=100812.0, 总和=109836.0 [原始解] 12. 组合: a=75.5, b=93 (8 个有效解) 1. x=696, y=616.0, a*x=52548.0, b*y=57288.0, 总和=109836.0 [平衡解] 2. x=510, y=767.0, a*x=38505.0, b*y=71331.0, 总和=109836.0 [平衡解] 3. x=138, y=1069.0, a*x=10419.0, b*y=99417.0, 总和=109836.0 [原始解] 4. x=324, y=918.0, a*x=24462.0, b*y=85374.0, 总和=109836.0 [原始解] 5. x=882, y=465.0, a*x=66591.0, b*y=43245.0, 总和=109836.0 [原始解] 使用基础系数列表,共找到有效解 总耗时: 0.01秒