buuoj [WUSTCTF2020]level1

1.nowin.exe 64bit

文件附带一个output.txt

逻辑如上，输出在output文件里面储存

编写脚本 逆向操作就好了

data=[0,198,232,816,200,1536,300,6144,984,51200,570,92160,1200,565248,756,1474560,800,6291456,1782,65536000]

for i in range(1,20,1):
    if i&1 != 0:
        tem=data[i]>>i
    else:
        tem=data[i]//i
    print(chr(tem),end='')

flag{d9-dE6-20c}