题解 | #24点游戏算法#

def run(al, n=24):
    res = 0
    if len(al) == 1:
        return al[0] == n
    for i in range(len(al)):
        tmp = al[:i]+al[i+1:]
        if run(tmp, n-al[i]) or run(tmp, n+al[i]) or run(tmp, n*al[i]) or run(tmp, n/al[i]):
            return True
    return False
    
al = list(map(int, input().split()))
res = run(al)
if res:
    print("true")
else:
    print("false")