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| back to board | it accepted! Posted by Jumbo  22 Mar 2011 01:45var n1,n,i:integer; a:array[1..200] of string;  s,s1:string;procedure zap(x:integer);
 var i,k:integer; s,s1,s2,s3:string;
 begin
 a[1]:='sin(1)';
 for i:=2 to x do begin
 
 s:=a[i-1];
 
 for k:=length(s) downto 1 do
 if (s[k]>='0') and (s[k]<='9') then begin
 str(i-1,s3);  delete(s,k+1-length(s3),length(s3));break end;
 
 
 if i mod 2=0 then begin
 str(i-1,s1);
 str(i,s2);
 s1:=s1+'-'+'sin'+'('+s2+')';
 insert(s1,s,k+1-length(s3));
 
 end else begin
 str(i-1,s1);
 str(i,s2);
 s1:=s1+'+'+'sin'+'('+s2+')';
 insert(s1,s,k+1-length(s3));
 end;
 a[i]:=s;
 end;
 end;
 begin
 read(n);
 zap(n);
 n1:=n-1;
 str(n,s1);
 s:='('+a[1]+'+'+s1+')';
 
 for i:=2 to n-1 do begin
 str(n1,s1);
 s:='('+s+a[i]+'+'+s1+')';
 n1:=n1-1;
 
 end;
 
 s:=s+a[n]+'+'+'1';
 if n=1 then writeln(a[1]+'+'+'1') else writeln(s);
 
 
 end.
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