rex_puzzle.py

# -*- coding: utf-8 -*-
# 暴力美學 2.0 - 以空間換時間

from itertools import permutations

candA, candB, candC = [], [], []

for item in permutations(range(1,10)):
    if(item[2] != 9): # 排除第3位是9的
        candA.append(item)
print("Candidates:",len(candA))

for can in candA:
    if((10*can[0]*can[2] + can[1] * can[2]) == (10*can[3] + can[4])):
        candB.append(can)
print("Candidates:", len(candB))

for can in candB:
    if((10*can[3] + can[4] + 10*can[5] + can[6]) == (10*can[7] + can[8])):
        candC.append(can)
print("Candidates:", len(candC))

for can in candC:
    print("Answer:", can)
    
# Answer: (1, 7, 4, 6, 8, 2, 5, 9, 3)