Triangle by pooq(*yuko*)

n=scan("stdin")
for(i in(-n^.5%/%.7+1):-1){j=i;s=c();repeat{m=j*(j=j-1)/2+i;m<n||break;s=c(s,m+1)};write(s,"",99)}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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