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 = 69731 # 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: 69731 ==== 尝试基础系数 ==== 找到 15 组2变量解: 1. 组合: a=36.5, b=41.5 (23 个有效解) 1. x=861, y=923.0, a*x=31426.5, b*y=38304.5, 总和=69731.0 [平衡解] 2. x=944, y=850.0, a*x=34456.0, b*y=35275.0, 总和=69731.0 [平衡解] 3. x=31, y=1653.0, a*x=1131.5, b*y=68599.5, 总和=69731.0 [原始解] 4. x=114, y=1580.0, a*x=4161.0, b*y=65570.0, 总和=69731.0 [原始解] 5. x=197, y=1507.0, a*x=7190.5, b*y=62540.5, 总和=69731.0 [原始解] 2. 组合: a=36.5, b=59 (16 个有效解) 1. x=766, y=708.0, a*x=27959.0, b*y=41772.0, 总和=69731.0 [平衡解] 2. x=648, y=781.0, a*x=23652.0, b*y=46079.0, 总和=69731.0 [平衡解] 3. x=58, y=1146.0, a*x=2117.0, b*y=67614.0, 总和=69731.0 [原始解] 4. x=176, y=1073.0, a*x=6424.0, b*y=63307.0, 总和=69731.0 [原始解] 5. x=294, y=1000.0, a*x=10731.0, b*y=59000.0, 总和=69731.0 [原始解] 3. 组合: a=36.5, b=68.5 (14 个有效解) 1. x=608, y=694.0, a*x=22192.0, b*y=47539.0, 总和=69731.0 [平衡解] 2. x=745, y=621.0, a*x=27192.5, b*y=42538.5, 总和=69731.0 [平衡解] 3. x=60, y=986.0, a*x=2190.0, b*y=67541.0, 总和=69731.0 [原始解] 4. x=197, y=913.0, a*x=7190.5, b*y=62540.5, 总和=69731.0 [原始解] 5. x=334, y=840.0, a*x=12191.0, b*y=57540.0, 总和=69731.0 [原始解] 4. 组合: a=36.5, b=74 (13 个有效解) 1. x=694, y=600.0, a*x=25331.0, b*y=44400.0, 总和=69731.0 [平衡解] 2. x=546, y=673.0, a*x=19929.0, b*y=49802.0, 总和=69731.0 [平衡解] 3. x=102, y=892.0, a*x=3723.0, b*y=66008.0, 总和=69731.0 [原始解] 4. x=250, y=819.0, a*x=9125.0, b*y=60606.0, 总和=69731.0 [原始解] 5. x=398, y=746.0, a*x=14527.0, b*y=55204.0, 总和=69731.0 [原始解] 5. 组合: a=36.5, b=91.5 (10 个有效解) 1. x=469, y=575.0, a*x=17118.5, b*y=52612.5, 总和=69731.0 [平衡解] 2. x=652, y=502.0, a*x=23798.0, b*y=45933.0, 总和=69731.0 [平衡解] 3. x=103, y=721.0, a*x=3759.5, b*y=65971.5, 总和=69731.0 [原始解] 4. x=286, y=648.0, a*x=10439.0, b*y=59292.0, 总和=69731.0 [原始解] 5. x=835, y=429.0, a*x=30477.5, b*y=39253.5, 总和=69731.0 [原始解] 6. 组合: a=41.5, b=59 (15 个有效解) 1. x=732, y=667.0, a*x=30378.0, b*y=39353.0, 总和=69731.0 [平衡解] 2. x=614, y=750.0, a*x=25481.0, b*y=44250.0, 总和=69731.0 [平衡解] 3. x=24, y=1165.0, a*x=996.0, b*y=68735.0, 总和=69731.0 [原始解] 4. x=142, y=1082.0, a*x=5893.0, b*y=63838.0, 总和=69731.0 [原始解] 5. x=260, y=999.0, a*x=10790.0, b*y=58941.0, 总和=69731.0 [原始解] 7. 组合: a=41.5, b=68.5 (12 个有效解) 1. x=680, y=606.0, a*x=28220.0, b*y=41511.0, 总和=69731.0 [平衡解] 2. x=543, y=689.0, a*x=22534.5, b*y=47196.5, 总和=69731.0 [平衡解] 3. x=132, y=938.0, a*x=5478.0, b*y=64253.0, 总和=69731.0 [原始解] 4. x=269, y=855.0, a*x=11163.5, b*y=58567.5, 总和=69731.0 [原始解] 5. x=406, y=772.0, a*x=16849.0, b*y=52882.0, 总和=69731.0 [原始解] 8. 组合: a=41.5, b=74 (12 个有效解) 1. x=630, y=589.0, a*x=26145.0, b*y=43586.0, 总和=69731.0 [平衡解] 2. x=482, y=672.0, a*x=20003.0, b*y=49728.0, 总和=69731.0 [平衡解] 3. x=38, y=921.0, a*x=1577.0, b*y=68154.0, 总和=69731.0 [原始解] 4. x=186, y=838.0, a*x=7719.0, b*y=62012.0, 总和=69731.0 [原始解] 5. x=334, y=755.0, a*x=13861.0, b*y=55870.0, 总和=69731.0 [原始解] 9. 组合: a=41.5, b=91.5 (9 个有效解) 1. x=461, y=553.0, a*x=19131.5, b*y=50599.5, 总和=69731.0 [平衡解] 2. x=644, y=470.0, a*x=26726.0, b*y=43005.0, 总和=69731.0 [平衡解] 3. x=95, y=719.0, a*x=3942.5, b*y=65788.5, 总和=69731.0 [原始解] 4. x=278, y=636.0, a*x=11537.0, b*y=58194.0, 总和=69731.0 [原始解] 5. x=827, y=387.0, a*x=34320.5, b*y=35410.5, 总和=69731.0 [原始解] 10. 组合: a=59, b=68.5 (8 个有效解) 1. x=541, y=552.0, a*x=31919.0, b*y=37812.0, 总和=69731.0 [平衡解] 2. x=678, y=434.0, a*x=40002.0, b*y=29729.0, 总和=69731.0 [平衡解] 3. x=130, y=906.0, a*x=7670.0, b*y=62061.0, 总和=69731.0 [原始解] 4. x=267, y=788.0, a*x=15753.0, b*y=53978.0, 总和=69731.0 [原始解] 5. x=404, y=670.0, a*x=23836.0, b*y=45895.0, 总和=69731.0 [原始解] 11. 组合: a=59, b=74 (16 个有效解) 1. x=551, y=503, a*x=32509.0, b*y=37222.0, 总和=69731.0 [平衡解] 2. x=477, y=562, a*x=28143.0, b*y=41588.0, 总和=69731.0 [平衡解] 3. x=33, y=916, a*x=1947.0, b*y=67784.0, 总和=69731.0 [原始解] 4. x=107, y=857, a*x=6313.0, b*y=63418.0, 总和=69731.0 [原始解] 5. x=181, y=798, a*x=10679.0, b*y=59052.0, 总和=69731.0 [原始解] 12. 组合: a=59, b=91.5 (6 个有效解) 1. x=484, y=450.0, a*x=28556.0, b*y=41175.0, 总和=69731.0 [平衡解] 2. x=301, y=568.0, a*x=17759.0, b*y=51972.0, 总和=69731.0 [平衡解] 3. x=118, y=686.0, a*x=6962.0, b*y=62769.0, 总和=69731.0 [原始解] 4. x=667, y=332.0, a*x=39353.0, b*y=30378.0, 总和=69731.0 [原始解] 5. x=850, y=214.0, a*x=50150.0, b*y=19581.0, 总和=69731.0 [原始解] 13. 组合: a=68.5, b=74 (7 个有效解) 1. x=534, y=448.0, a*x=36579.0, b*y=33152.0, 总和=69731.0 [平衡解] 2. x=386, y=585.0, a*x=26441.0, b*y=43290.0, 总和=69731.0 [平衡解] 3. x=90, y=859.0, a*x=6165.0, b*y=63566.0, 总和=69731.0 [原始解] 4. x=238, y=722.0, a*x=16303.0, b*y=53428.0, 总和=69731.0 [原始解] 5. x=682, y=311.0, a*x=46717.0, b*y=23014.0, 总和=69731.0 [原始解] 14. 组合: a=68.5, b=91.5 (5 个有效解) 1. x=485, y=399.0, a*x=33222.5, b*y=36508.5, 总和=69731.0 [平衡解] 2. x=302, y=536.0, a*x=20687.0, b*y=49044.0, 总和=69731.0 [平衡解] 3. x=119, y=673.0, a*x=8151.5, b*y=61579.5, 总和=69731.0 [原始解] 4. x=668, y=262.0, a*x=45758.0, b*y=23973.0, 总和=69731.0 [原始解] 5. x=851, y=125.0, a*x=58293.5, b*y=11437.5, 总和=69731.0 [原始解] 15. 组合: a=74, b=91.5 (6 个有效解) 1. x=376, y=458.0, a*x=27824.0, b*y=41907.0, 总和=69731.0 [平衡解] 2. x=559, y=310.0, a*x=41366.0, b*y=28365.0, 总和=69731.0 [平衡解] 3. x=10, y=754.0, a*x=740.0, b*y=68991.0, 总和=69731.0 [原始解] 4. x=193, y=606.0, a*x=14282.0, b*y=55449.0, 总和=69731.0 [原始解] 5. x=742, y=162.0, a*x=54908.0, b*y=14823.0, 总和=69731.0 [原始解] 使用基础系数列表,共找到有效解 总耗时: 0.01秒