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 = 191470 # 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: 191470 ==== 尝试基础系数 ==== 找到 13 组2变量解: 1. 组合: a=38.5, b=61 (5 个有效解) 1. x=2050, y=1845.0, a*x=78925.0, b*y=112545.0, 总和=191470.0 [平衡解] 2. x=1684, y=2076.0, a*x=64834.0, b*y=126636.0, 总和=191470.0 [平衡解] 3. x=2416, y=1614.0, a*x=93016.0, b*y=98454.0, 总和=191470.0 [原始解] 4. x=2782, y=1383.0, a*x=107107.0, b*y=84363.0, 总和=191470.0 [原始解] 5. x=3148, y=1152.0, a*x=121198.0, b*y=70272.0, 总和=191470.0 [原始解] 2. 组合: a=38.5, b=70.5 (13 个有效解) 1. x=1798, y=1734.0, a*x=69223.0, b*y=122247.0, 总和=191470.0 [平衡解] 2. x=1657, y=1811.0, a*x=63794.5, b*y=127675.5, 总和=191470.0 [平衡解] 3. x=1939, y=1657.0, a*x=74651.5, b*y=116818.5, 总和=191470.0 [原始解] 4. x=2080, y=1580.0, a*x=80080.0, b*y=111390.0, 总和=191470.0 [原始解] 5. x=2221, y=1503.0, a*x=85508.5, b*y=105961.5, 总和=191470.0 [原始解] 3. 组合: a=38.5, b=75.5 (4 个有效解) 1. x=1714, y=1662.0, a*x=65989.0, b*y=125481.0, 总和=191470.0 [平衡解] 2. x=2167, y=1431.0, a*x=83429.5, b*y=108040.5, 总和=191470.0 [平衡解] 3. x=2620, y=1200.0, a*x=100870.0, b*y=90600.0, 总和=191470.0 [原始解] 4. x=3073, y=969.0, a*x=118310.5, b*y=73159.5, 总和=191470.0 [原始解] 4. 组合: a=38.5, b=93 (9 个有效解) 1. x=1804, y=1312.0, a*x=69454.0, b*y=122016.0, 总和=191470.0 [平衡解] 2. x=1990, y=1235.0, a*x=76615.0, b*y=114855.0, 总和=191470.0 [平衡解] 3. x=2176, y=1158.0, a*x=83776.0, b*y=107694.0, 总和=191470.0 [原始解] 4. x=2362, y=1081.0, a*x=90937.0, b*y=100533.0, 总和=191470.0 [原始解] 5. x=2548, y=1004.0, a*x=98098.0, b*y=93372.0, 总和=191470.0 [原始解] 5. 组合: a=44, b=61 (13 个有效解) 1. x=1809, y=1834, a*x=79596.0, b*y=111874.0, 总和=191470.0 [平衡解] 2. x=1931, y=1746, a*x=84964.0, b*y=106506.0, 总和=191470.0 [平衡解] 3. x=1443, y=2098, a*x=63492.0, b*y=127978.0, 总和=191470.0 [原始解] 4. x=1565, y=2010, a*x=68860.0, b*y=122610.0, 总和=191470.0 [原始解] 5. x=1687, y=1922, a*x=74228.0, b*y=117242.0, 总和=191470.0 [原始解] 6. 组合: a=44, b=70.5 (5 个有效解) 1. x=1679, y=1668.0, a*x=73876.0, b*y=117594.0, 总和=191470.0 [平衡解] 2. x=1961, y=1492.0, a*x=86284.0, b*y=105186.0, 总和=191470.0 [平衡解] 3. x=2243, y=1316.0, a*x=98692.0, b*y=92778.0, 总和=191470.0 [原始解] 4. x=2525, y=1140.0, a*x=111100.0, b*y=80370.0, 总和=191470.0 [原始解] 5. x=2807, y=964.0, a*x=123508.0, b*y=67962.0, 总和=191470.0 [原始解] 7. 组合: a=44, b=75.5 (5 个有效解) 1. x=1613, y=1596.0, a*x=70972.0, b*y=120498.0, 总和=191470.0 [平衡解] 2. x=1915, y=1420.0, a*x=84260.0, b*y=107210.0, 总和=191470.0 [平衡解] 3. x=2217, y=1244.0, a*x=97548.0, b*y=93922.0, 总和=191470.0 [原始解] 4. x=2519, y=1068.0, a*x=110836.0, b*y=80634.0, 总和=191470.0 [原始解] 5. x=2821, y=892.0, a*x=124124.0, b*y=67346.0, 总和=191470.0 [原始解] 8. 组合: a=44, b=93 (9 个有效解) 1. x=1439, y=1378, a*x=63316.0, b*y=128154.0, 总和=191470.0 [平衡解] 2. x=1625, y=1290, a*x=71500.0, b*y=119970.0, 总和=191470.0 [平衡解] 3. x=1811, y=1202, a*x=79684.0, b*y=111786.0, 总和=191470.0 [原始解] 4. x=1997, y=1114, a*x=87868.0, b*y=103602.0, 总和=191470.0 [原始解] 5. x=2183, y=1026, a*x=96052.0, b*y=95418.0, 总和=191470.0 [原始解] 9. 组合: a=61, b=70.5 (4 个有效解) 1. x=1537, y=1386.0, a*x=93757.0, b*y=97713.0, 总和=191470.0 [平衡解] 2. x=1255, y=1630.0, a*x=76555.0, b*y=114915.0, 总和=191470.0 [平衡解] 3. x=1819, y=1142.0, a*x=110959.0, b*y=80511.0, 总和=191470.0 [原始解] 4. x=2101, y=898.0, a*x=128161.0, b*y=63309.0, 总和=191470.0 [原始解] 10. 组合: a=61, b=75.5 (4 个有效解) 1. x=1463, y=1354.0, a*x=89243.0, b*y=102227.0, 总和=191470.0 [平衡解] 2. x=1161, y=1598.0, a*x=70821.0, b*y=120649.0, 总和=191470.0 [平衡解] 3. x=1765, y=1110.0, a*x=107665.0, b*y=83805.0, 总和=191470.0 [原始解] 4. x=2067, y=866.0, a*x=126087.0, b*y=65383.0, 总和=191470.0 [原始解] 11. 组合: a=61, b=93 (5 个有效解) 1. x=1195, y=1275, a*x=72895.0, b*y=118575.0, 总和=191470.0 [平衡解] 2. x=1381, y=1153, a*x=84241.0, b*y=107229.0, 总和=191470.0 [平衡解] 3. x=1567, y=1031, a*x=95587.0, b*y=95883.0, 总和=191470.0 [原始解] 4. x=1753, y=909, a*x=106933.0, b*y=84537.0, 总和=191470.0 [原始解] 5. x=1939, y=787, a*x=118279.0, b*y=73191.0, 总和=191470.0 [原始解] 12. 组合: a=70.5, b=75.5 (6 个有效解) 1. x=1268, y=1352.0, a*x=89394.0, b*y=102076.0, 总和=191470.0 [平衡解] 2. x=1419, y=1211.0, a*x=100039.5, b*y=91430.5, 总和=191470.0 [平衡解] 3. x=966, y=1634.0, a*x=68103.0, b*y=123367.0, 总和=191470.0 [原始解] 4. x=1117, y=1493.0, a*x=78748.5, b*y=112721.5, 总和=191470.0 [原始解] 5. x=1570, y=1070.0, a*x=110685.0, b*y=80785.0, 总和=191470.0 [原始解] 13. 组合: a=75.5, b=93 (5 个有效解) 1. x=1202, y=1083.0, a*x=90751.0, b*y=100719.0, 总和=191470.0 [平衡解] 2. x=1016, y=1234.0, a*x=76708.0, b*y=114762.0, 总和=191470.0 [平衡解] 3. x=830, y=1385.0, a*x=62665.0, b*y=128805.0, 总和=191470.0 [原始解] 4. x=1388, y=932.0, a*x=104794.0, b*y=86676.0, 总和=191470.0 [原始解] 5. x=1574, y=781.0, a*x=118837.0, b*y=72633.0, 总和=191470.0 [原始解] 使用基础系数列表,共找到有效解 总耗时: 0.01秒