题解 | #24点游戏算法#

#希望这是牛客最简单的解法，求点赞
import sys
import itertools

data=sys.stdin.readlines()
m=data[0].strip("\n").split(" ")
for i in range(len(m)):
    m[i]=int(m[i])


def love(a,b):
    result=[]
    result.append(a+b)
    result.append(a-b)
    result.append(a*b)
    result.append(a/b)
    return result

a=itertools.permutations(m,4)


def calc(a):
    for item in a:
        r=love(item[0],item[1])
        r2=[]
        for c in r:
            r2=r2+love(c,item[2])
        r3=[]
        for c in r2:
            r3=r3+love(c,item[3])
        for c in r3:
            if c==24:
                return 'true'
    return 'false'

r=calc(a)
print(r)