题解 | #24点游戏算法#

import sys,itertools

for line in sys.stdin:
    a = list(map(int,line.strip().split(" ")))
    for e in itertools.permutations(a,4):
        for nam1 in ['+','-','*','/']:
            for nam2 in ['+','-','*','/']:
                for nam3 in ['+','-','*','/']:
                    resault1 = eval(f'(({e[0]}{nam1}{e[1]}){nam2}{e[2]}){nam3}{e[3]}')
                    if resault1 == 24.0 or resault1 == 24:
                        print("true")
                        sys.exit()
    else:
        print("false")