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Hailstone number
//fpc 3.0.0 program Hailstone_number; var i,n,x:integer; begin i:=0; write('Input a number?'); readln(n); writeln('Initial value is ',n); while n<>1 do begin x:= (n mod 2); if x=0 then n:= n div 2 else n:= 3*n+1; writeln('Next value is ',n); i:=i+1; end; writeln; writeln('Final value is 1'); writeln('Number of steps is ',i); end.
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