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CV$01$

$"$ Finclude $$ stdio. h$\backslash$#include $\backslash$#includeh $>$ int main$()$ i $$ pid$\_$t child; int status; $>$thild $-$ fork $()$: switch $($child$)($ case $-1$ : $("")(1)(2)$: $$: $($waitpid$($child$,$ sstatus, WNOHANG$)=0)$ printf $(""$sdin$"",$ WEXITSTATus $($status$))1$ o; int x$=10,$y$80$; $$y$$y$+$x; $90$ pide c$=$ fork $()$ : if

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$=0)$ i $$ x$+=$y$10+90=100(""$sdid$"",$ x$,$x$$y$)$: $$ f $($NuLL$)$ : $\backslash \}0$ ; t a$)100109090$ b$)100101090$ c$)109010010$ d$)10010100903.$ PID $53720$ PIDS$53721,53722...$ Aincludecstdio.h$>$ includecunistd, h$>$ includessignal, h$>$ void h$($int s$)1$ printfi""$[$id$]"",$ getpidil$)+$ void nain $(1)($SIGKItL$,$ h$)$: pid t; cofork$(1)$ if $($C$=0)4$ sleep $\{1\}$: ald $$ printfl""$[$sd$]"",$ getpidus: ifle $!-$ D$)1($a$,$ sIlikILL$)$: $($NuLL$)$ r $$ I""$[$of$]""$ getptdol: $($i$)[53720]$ b$)[53721][53720]$ c$)[53721][53721][53720]$ d$)[53721][53721][53721][53720]4."$CMPS$405"\backslash$#includerations tincludesstrilib.h$>\backslash$#irteludecunista.h$>$ int maln $()\backslash$& if fork $(1$m$)0\}()$ if $\{$ exec$1(""/$Din$/1$s$"",""1$s$"",$ NULL $)==1)(""$ execl $"")\backslash \{1\backslash \}$: $\backslash \}(""$CMPS$405/$n$"")(1)0$ ; $]$ a$)0$ b$)1$ c$)2$ d$)"$