from itertools import permutations, product from operator import add, sub, mul import math def div(a,b): return a/b if b else float('inf') operators = [add, sub, mul, div] a = list(map(int,input().split())) a_perms = set(permutations(a)) op_prod = list(product(operators,repeat=3)) flag=False for a1,a2,a3,a4 in a_perms: for f1,f2,f3 in op_prod: if math.isclose(f1(a1,f2(a2,f3(a3,a4))),24) or\ math.isclose(f1(f2(a1,a2),f3(a3,a4)),24): flag = True if flag: print("true") else: print('false')优雅的枚举