part $1$: how to buffer overflow this? I am using Linux console. This language is C$.$

#include

#include

int main$()\{$

char command$[200]$;

char userString$[100]$;

printf$("$Input a string to echo: $")$;

fgets$($userString$,$ sizeof$($userString$),$ stdin$)$;

snprintf$($command$,$ sizeof$($command$),$ "echo $\backslash "\%$s$\backslash "",$ userString$)$;

setresuid$(502,502,502)$;

system$($command$)$;

return $0$;

$\}$

Part $2$: The basic goal of each challenge is to get it to execute in such a way that you are able to open a shell

with the privileges of $$winnerX$,$ where X is the challenge number. This user has permission to write to

the $$tag$$ file, which is where you are to place your name in order to signify that you have successfully

completed the challenge. The full path to the shell application is $/$bin$/$sh$.$ The tag file is append only,

simply insert your name at the end of the file