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 = 119900 # 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 = 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: 119900 ==== 尝试基础系数 ==== 找到 12 组2变量解: 1. 组合: a=36.5, b=41.5 (14 个有效解) 1. x=1501, y=1569.0, a*x=54786.5, b*y=65113.5, 总和=119900.0 [平衡解] 2. x=1750, y=1350.0, a*x=63875.0, b*y=56025.0, 总和=119900.0 [平衡解] 3. x=7, y=2883.0, a*x=255.5, b*y=119644.5, 总和=119900.0 [原始解] 4. x=256, y=2664.0, a*x=9344.0, b*y=110556.0, 总和=119900.0 [原始解] 5. x=505, y=2445.0, a*x=18432.5, b*y=101467.5, 总和=119900.0 [原始解] 2. 组合: a=36.5, b=59 (9 个有效解) 1. x=1384, y=1176.0, a*x=50516.0, b*y=69384.0, 总和=119900.0 [平衡解] 2. x=1030, y=1395.0, a*x=37595.0, b*y=82305.0, 总和=119900.0 [平衡解] 3. x=322, y=1833.0, a*x=11753.0, b*y=108147.0, 总和=119900.0 [原始解] 4. x=676, y=1614.0, a*x=24674.0, b*y=95226.0, 总和=119900.0 [原始解] 5. x=1738, y=957.0, a*x=63437.0, b*y=56463.0, 总和=119900.0 [原始解] 3. 组合: a=36.5, b=68.5 (8 个有效解) 1. x=1168, y=1128.0, a*x=42632.0, b*y=77268.0, 总和=119900.0 [平衡解] 2. x=757, y=1347.0, a*x=27630.5, b*y=92269.5, 总和=119900.0 [平衡解] 3. x=346, y=1566.0, a*x=12629.0, b*y=107271.0, 总和=119900.0 [原始解] 4. x=1579, y=909.0, a*x=57633.5, b*y=62266.5, 总和=119900.0 [原始解] 5. x=1990, y=690.0, a*x=72635.0, b*y=47265.0, 总和=119900.0 [原始解] 4. 组合: a=36.5, b=74 (7 个有效解) 1. x=1144, y=1056.0, a*x=41756.0, b*y=78144.0, 总和=119900.0 [平衡解] 2. x=700, y=1275.0, a*x=25550.0, b*y=94350.0, 总和=119900.0 [平衡解] 3. x=256, y=1494.0, a*x=9344.0, b*y=110556.0, 总和=119900.0 [原始解] 4. x=1588, y=837.0, a*x=57962.0, b*y=61938.0, 总和=119900.0 [原始解] 5. x=2032, y=618.0, a*x=74168.0, b*y=45732.0, 总和=119900.0 [原始解] 5. 组合: a=36.5, b=91.5 (18 个有效解) 1. x=931, y=939.0, a*x=33981.5, b*y=85918.5, 总和=119900.0 [平衡解] 2. x=1114, y=866.0, a*x=40661.0, b*y=79239.0, 总和=119900.0 [平衡解] 3. x=16, y=1304.0, a*x=584.0, b*y=119316.0, 总和=119900.0 [原始解] 4. x=199, y=1231.0, a*x=7263.5, b*y=112636.5, 总和=119900.0 [原始解] 5. x=382, y=1158.0, a*x=13943.0, b*y=105957.0, 总和=119900.0 [原始解] 6. 组合: a=41.5, b=68.5 (11 个有效解) 1. x=953, y=1173.0, a*x=39549.5, b*y=80350.5, 总和=119900.0 [平衡解] 2. x=1227, y=1007.0, a*x=50920.5, b*y=68979.5, 总和=119900.0 [平衡解] 3. x=131, y=1671.0, a*x=5436.5, b*y=114463.5, 总和=119900.0 [原始解] 4. x=405, y=1505.0, a*x=16807.5, b*y=103092.5, 总和=119900.0 [原始解] 5. x=679, y=1339.0, a*x=28178.5, b*y=91721.5, 总和=119900.0 [原始解] 7. 组合: a=41.5, b=91.5 (7 个有效解) 1. x=1079, y=821.0, a*x=44778.5, b*y=75121.5, 总和=119900.0 [平衡解] 2. x=713, y=987.0, a*x=29589.5, b*y=90310.5, 总和=119900.0 [平衡解] 3. x=347, y=1153.0, a*x=14400.5, b*y=105499.5, 总和=119900.0 [原始解] 4. x=1445, y=655.0, a*x=59967.5, b*y=59932.5, 总和=119900.0 [原始解] 5. x=1811, y=489.0, a*x=75156.5, b*y=44743.5, 总和=119900.0 [原始解] 8. 组合: a=59, b=68.5 (8 个有效解) 1. x=841, y=1026.0, a*x=49619.0, b*y=70281.0, 总和=119900.0 [平衡解] 2. x=1115, y=790.0, a*x=65785.0, b*y=54115.0, 总和=119900.0 [平衡解] 3. x=19, y=1734.0, a*x=1121.0, b*y=118779.0, 总和=119900.0 [原始解] 4. x=293, y=1498.0, a*x=17287.0, b*y=102613.0, 总和=119900.0 [原始解] 5. x=567, y=1262.0, a*x=33453.0, b*y=86447.0, 总和=119900.0 [原始解] 9. 组合: a=59, b=91.5 (6 个有效解) 1. x=745, y=830.0, a*x=43955.0, b*y=75945.0, 总和=119900.0 [平衡解] 2. x=1111, y=594.0, a*x=65549.0, b*y=54351.0, 总和=119900.0 [平衡解] 3. x=13, y=1302.0, a*x=767.0, b*y=119133.0, 总和=119900.0 [原始解] 4. x=379, y=1066.0, a*x=22361.0, b*y=97539.0, 总和=119900.0 [原始解] 5. x=1477, y=358.0, a*x=87143.0, b*y=32757.0, 总和=119900.0 [原始解] 10. 组合: a=68.5, b=74 (12 个有效解) 1. x=844, y=839.0, a*x=57814.0, b*y=62086.0, 总和=119900.0 [平衡解] 2. x=696, y=976.0, a*x=47676.0, b*y=72224.0, 总和=119900.0 [平衡解] 3. x=104, y=1524.0, a*x=7124.0, b*y=112776.0, 总和=119900.0 [原始解] 4. x=252, y=1387.0, a*x=17262.0, b*y=102638.0, 总和=119900.0 [原始解] 5. x=400, y=1250.0, a*x=27400.0, b*y=92500.0, 总和=119900.0 [原始解] 11. 组合: a=68.5, b=91.5 (10 个有效解) 1. x=818, y=698.0, a*x=56033.0, b*y=63867.0, 总和=119900.0 [平衡解] 2. x=635, y=835.0, a*x=43497.5, b*y=76402.5, 总和=119900.0 [平衡解] 3. x=86, y=1246.0, a*x=5891.0, b*y=114009.0, 总和=119900.0 [原始解] 4. x=269, y=1109.0, a*x=18426.5, b*y=101473.5, 总和=119900.0 [原始解] 5. x=452, y=972.0, a*x=30962.0, b*y=88938.0, 总和=119900.0 [原始解] 12. 组合: a=74, b=91.5 (8 个有效解) 1. x=730, y=720.0, a*x=54020.0, b*y=65880.0, 总和=119900.0 [平衡解] 2. x=547, y=868.0, a*x=40478.0, b*y=79422.0, 总和=119900.0 [平衡解] 3. x=181, y=1164.0, a*x=13394.0, b*y=106506.0, 总和=119900.0 [原始解] 4. x=364, y=1016.0, a*x=26936.0, b*y=92964.0, 总和=119900.0 [原始解] 5. x=913, y=572.0, a*x=67562.0, b*y=52338.0, 总和=119900.0 [原始解] 使用基础系数列表,共找到有效解 总耗时: 0.01秒