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o={};for(e in scan())ifo="if"(e)o=c,c(e,o)else o=o[,o[-1];o1]);o
Try it online!Try it online!
o={};for(e in scan())if(e)o=c(e,o)else o=o[-1];o
Try it online!
o={};for(e in scan())o="if"(e,c(e,o),o[-1]);o
foro={};for(e in scan())if(!e)F=F[-1]else F=co=c(e,Fo);F[F>0]else o=o[-1];o
for(e in scan())if(!e)F=F[-1]else F=c(e,F);F[F>0]
for(e in scan())'if'if(!e,F<-F[-1],F<)F=F[-c1]else F=c(e,F));F[F>0]
for(e in scan())'if'(!e,F<-F[-1],F<-c(e,F));F[F>0]
