cumulative max folding

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Problem

Given a string S, output a string T whose Kth character corresponds to the maximal character (by ASCII codepoint) seen in the first K characters in S. Or: Cumulatively fold maximum.

--conor_obrien

Options

exec is denied

rejudge feature is enabled

now post-mortem time, all source codes will be revealed

Sample input:_

what is the meaning of life?
hello
And What Would That Be, Good Sir?
...it's a word, of course!
Oh, you most preposterous man~

Sample output:

wwwwwwwwwwwwwwwwwwwwwwwwwwww
hhllo
Annnnnnttttuuuuuuuuuuuuuuuuuuuuuu
...ittttttwwwwwwwwwwwwwwww
Ohhhyyyyyyyyyyyyyyyyyyyyyyyyy~

Sample input:_

 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#" !
!#$ "'%(&)-,+*.1/20347568=:9;<BA?@>FGDCEHJKLIMOQPNRVTUSWXY[Z`^]\_ecadbgfhjiknmolprqtsxyvuw{}~z|
Z?p%~1j,N xh9K<Wg(`i$y:lJ*GSV5P/"q8w;OtuFc#Dbz}CL+U0Q34X![r)R@Ik|>A-&T_.ds]voM=267^Y'{\EmenHBaf
&23",*#$)%(.+ /0'!-1;6=:GD75C<>FE8@A94B?NLJYIOMXRZH[TUPQVSKWieo_hjfdl]k\^g`ambcnwu|pvsy{qx}~rtz
]7h)#|t+*%{DT_f1`zon"<:SrC02(ybi?L34wF&9ZPjE-}s;Oc'VI>m@qG/Xvkx\eYApu Ugl,a.6=KQH![RB85^$NWMJ~d
&)-{:eOD8Mr_c^"|@9!x/lI0#hqoQ1~Bf3\VWH;j(vu4N.[LFCm+Yynta,A>*U=pG]Jb'E2$TZ5KSk`i7RPw}sg?z< %6dX
eDmvLW@oqGH\lhB9I$uk&i^]C:w6s)nj(<#zUNK MxJS,2/tb=;Xdc|>3R+QFZ7-%rY!gaT[~'f5A"0?yPpV`14.}O{*_8E
"! $#%(&'*+),-.0/13247569:8=;<@>?CABEDFGIHKJLONMQPRUTSVXW[YZ]^\_a`cbdefghjimklpnosrqutvxyw|z{}~
&,($.-'0 %2/!1*+"#)3=GA<@;F?6E95>:4C7D8BIWURJVHYXO[PQKZNLTSMdabmfogkl_i^j\enh]c`|y}rpqwvt{uszx~

Sample output:

 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!#$$$''(()----.1122347778=====BBBBBFGGGGHJKLLMOQQQRVVVVWXY[[`````eeeeegghjjknnooprrttxyyyy{}~~~
ZZpp~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
&2333333333333333333;;==GGGGGGGGGGGGGGGGNNNYYYYYYZZ[[[[[[[[[iiooooooooooooooooooww||||||||}~~~~
]]hhh||||||||||||||||||||||||||||||||||||||||}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}~~
&)-{{{{{{{{{{{{|||||||||||||||~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
eemvvvvvvvvvvvvvvvvvvvvvvvwwwwwwwwwzzzzzzzzzzzzzzzzzzz||||||||||||||||||~~~~~~~~~~~~~~~~~~~~~~~
"""$$%(((*++,-.0013347779::===@@@CCCEEFGIIKKLOOOQQRUUUVXX[[[]^^_aaccdefghjjmmmpppsssuuvxyy|||}~
&,,,...0002222222223=GGGGGGGGGGGGGGGGGGGIWWWWWWYYY[[[[[[[[[[dddmmooooooooooooooo||}}}}}}}}}}}}~

Sample input:_

!! "ABACADABRA, ALA_KAZAM a bead of beds has found no zebras"
Nolan, do you believe in magic?
public static int main () {}
(INT []) void(3) { print(4) }
LF,1!:2(7)
                                                                          ~
aba bcb cdc ded efe
Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Sample output:

!!!"ABBCCDDDRRRRRRR_______aabeeeeoooooossssssssuuuuuuuzzzzzzz
Noooooooooyyyyyyyyyyyyyyyyyyyyy
puuuuuuuuuuuuuuuuuuuuuuuuu{}
(INTT[]]]vvvvvvvv{{{{{{{{{{{}
LLLLLLLLLL
                                                                          ~
abbbbccccddddeeeeff
Lorrrrrrsuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

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