buu 浪里淘沙 1

题目描述：

在这里插入图片描述

题目分析：

看了这一大串字符串，发现里面都是由16个字母组成，即 “tonight success notice we example crypto should back space sublim found system morning user the enter ”，并且这16个字母在第一行中就能全部找出
题目中给出了一串数字：4，8，11，15，16，由此可以想到是上面16个字母中的位置和组合
因此要将上面的字母进行排序
如何排序呢？按照字母个数进行排序即可
排出来可以得到（前面的数字是字母的个数，即morning有113个）：
[(113, ‘morning’), (117, ‘tonight’), (120, ‘enter’), (124, ‘we’), (125, ‘found’), (129, ‘backspace’), (130, ‘system’), (131, ‘should’), (132, ‘sublim’), (133, ‘user’), (134, ‘learn’), (136, ‘notice’), (138, ‘success’), (139, ‘example’), (140, ‘the’), (141, ‘crypto’)]
然后再按照4，8，11，15，16的索引找出相应字母并组合
4 ---->we
8 ---->should
11 ---->learn
15 ---->the
16 ---->crypto
flag{weshoulelearnthecrypto}

解题代码

content='''tonightsuccessnoticenoticewewesuccesstonightweexamplecryptoshouldwebackspacetonightbackspaceexamplelearnwesublimlearnbackspacetheshouldwelearnfoundsublimsystemexamplesublimfoundlearnshouldmorningsublimsystemuserlearnthecryptomorningexamplenoticetonightlearntonightlearntonightsublimenterusermorningfoundtonightweenterfoundnoticethecryptomorningthebackspacelearntonightlearnsublimtonightlearnfoundenterfoundsuccesstonightsuccessuserfoundmorningtonighttheshouldsublimentertonightenterbackspacelearnexamplenoticeexamplefoundsystemsuccesssublimsuccessshouldtonightcryptowelearncryptofoundshouldsublimsublimweentertonightsuccessshouldentertheentercryptouserbackspaceshouldentersystemsuccesssystementerfoundenterlearnexampletonightnoticemorningusertonightlearnmorningtonightfoundfoundsuccessnoticesystementerlearnexamplebackspaceshouldcryptocryptosublimweexampletonighttheshouldthemorningbackspacelearntonightsystemsuccesssuccessbackspacemorningnoticeuserfoundfoundtonightmorningenterenterthefoundbackspacelearnenterentershouldthesystemfounduserlearnlearnsystemnoticetonighttheshouldlearnuserbackspaceweusernoticeshouldthewefoundsystemwecryptocryptowethebackspacesystementershouldtonightsystemnoticemorningsystemweentermorningfoundsuccessusertonightsuccesstonightbackspaceshouldweenterthewesystemusernoticesystemthelearnexamplelearnfoundlearnnoticeexamplesystemthecryptocryptolearnsystemthecryptoenterlearnexamplemorningmorningweenterentersuccessexampleuserthebackspacenoticesublimenterbackspacesuccessbackspacethesublimexamplesystemtheexamplecryptolearnuserexamplelearnsystemusersuccessenterentersuccesstheuserbackspacelearnsuccessbackspacethesublimshouldwebackspaceexamplesuccesssuccesstonightweusershouldsuccessmorningcryptomorningfoundbackspacesublimshouldentershouldnoticesuccessmorningsuccessexamplelearnshouldsublimlearntonightshoulduserbackspacesublimlearncryptosuccessenternoticetonightmorningtonightwesuccessweuserbackspaceexamplewesystemnoticemorningsystemmorningcryptolearnsystemthethefoundcryptouserlearnusersystemwemorningenterexampleshouldlearncryptofoundenterbackspacelearnenterenterbackspaceshouldbackspacetheshouldthesystemshouldshouldsuccessmorningthefoundsystementersystemtonightcryptowelearnexampleexamplesystementerbackspaceshouldtheentersublimtonightfoundfoundsuccesssuccesssystemsublimcryptoshouldentersublimmorninglearnfoundtonightcryptobackspacesuccesscryptowebackspacefoundshouldnoticeshouldmorningnoticesystemcryptosystemlearnsystemnoticemorningsystementerwemorninglearnsuccessfoundwesuccesswetheusercryptousernoticebackspacesuccessshouldtonightmorningentermorninguserenternoticefoundmorningwetonightsystemthecryptotonightcryptosystemuserthefoundexampletonightusersystemcryptosublimmorninguserthefoundbackspaceshouldsuccesscryptotonightsystemnoticebackspaceusershouldenterthecryptomorningwesublimnoticesuccessnoticeusersuccesstonightlearnweuserenterfounduserexampleshouldshouldtonightwelearnthenoticethewefoundmorningexampleshouldexamplethesuccessnoticeenterfoundthecryptonoticeuserlearnuserweenterfoundmorningsystemweexamplenoticethebackspaceexamplesublimtheusermorningtonightthesuccesscryptosuccessusersuccesstonighttonightwelearnenterenterthemorningentersystemcryptobackspacemorningsystemexamplecryptouserexamplelearnsublimsuccessusersystemfoundmorningshouldcryptotonightsublimtheexamplemorningsystemuserexampleweexamplenoticesuccesssublimnoticecryptoshouldbackspaceshouldthetonightfoundsublimbackspacebackspacetonightshouldbackspacesuccesstonightbackspacesuccessmorningsystemcryptobackspaceentertonighttonightnoticelearnshoulduserfoundexamplesystemthesuccessweusertonightcryptousernoticeenternoticebackspaceusersystemfoundusernoticeshouldlearnuserfoundexampleusermorningshouldsuccessmorningmorningexampleexamplefoundsublimfoundenterbackspacenoticelearnfoundmorningcryptonoticecryptoshouldweshouldtonightcryptobackspacesublimcryptosublimenterentersublimentercryptonoticethethesublimexampleenterentershouldlearncryptoentershouldmorninglearnnoticeuserexamplesublimtonightshouldfoundtonightsuccessshouldmorningfoundtheweuserlearnsublimsystembackspacecryptotheusertonightcryptosublimmorningmorningexamplenoticetheenterlearnshouldmorningsublimfoundtonightsublimsublimexamplefounduserexamplethefoundwemorningnoticefoundcryptosuccesssublimsublimexamplethesuccessexamplenoticesuccessbackspacesublimlearnuserexamplesuccesssuccesssystemsuccessmorningmorninglearnexamplemorningtonightfoundbackspaceenternoticemorningentersuccessmorningusermorningbackspacelearncryptoenteruserenteruserthetonighttonightsuccesslearnenterfoundsuccesssystemfoundbackspaceenterlearnsystemsublimcryptoentermorningwetonightshouldlearnenterfoundcryptonoticelearnlearnshouldfoundsuccessexampletonightthesuccessfoundusertonightenterfoundsuccessshouldmorningusernoticemorningsystemsystemsuccessshouldwelearnenterfoundexamplewethefoundweshouldsystemsystemmorningmorningbackspaceshouldentersublimentertonightsuccesssystemsystemcryptousershouldsublimfoundwetonightnoticeexamplewewesuccessfoundusertonightfo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list1=['tonight','success','notice','example','should','crypto','backspace','learn','found','morning','we','system','sublim','the','user','enter',]
l = []
for each in list1:
    if each in content:
        print(content.count(each),each,end = ' ')
        l.append((content.count(each),each))
'''4,8,11,15,16'''
l = sorted(l)
print()
print(l)

dest = [l[i-1] for i in (4,8,11,15,16)]
print(dest)
print(''.join([i[1] for i in dest]))