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getnum(i+1); end; end; end;

begin

assign(input,'SRAMOC.DAT'); assign(output,'SRAMOC.OUT'); reset(input); rewrite(output); read(k );

read(m); test:=false; l:=1;

if m

n:=m; end else begin

l:=0;

while not test do begin

l:=l+1; getnum(1); end; end;

write(n); close(input); close(output); end. 269

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СÃ÷¹¹ÔìÁËÒ»¸öÎÞÇîСÊýx=0.1234567891011?9899100101?£¬ÆäÖеÄÊý×ÖÊÇÒÀ´Îдϸ÷×ÔÈ»Êý¶øµÃµ½µÄ¡£ÊÔÇó³öСÊýµãºóµÚmλÊý×Ö¡£ ÊäÈ룺ÎļþÖÐÿÐÐÓÐÒ»¸öÕûÊým( m<=20000)¡£ Êä³ö£ºÊä³öÎļþÖÐÿÐÐÓÐÒ»¸öÊý×Ö£¬´æ·Å×ÅСÊýµãºóµÚmλÊý×Ö¡£ 2 var

m,n:integer;

function mexp(a:integer):l ongint; var

i:integer; t:longint; begin

t:=1;

for i:=1 to a do begin

t:=t*10; end; mexp:=t; end;

function mstr(x:integer):string;

var

ms:string; begin

str(x,ms); mstr:=ms; end;

procedure writeret(n:integer); var

i,r:integer; x:longint; s:string; begin

i:=-1;

while n>0 do begin

i:=i+1;

n:=n-9*mexp(i); end;

n:=n+9*mexp (i);

if n mod (i+1)=0 then r:=i+1 else

r:=n mod (i+1); x:=(n-r) div (i+1); s:=mstr(x+mexp(i)); s:=copy(s,r,1); writeln(s); end;

begin

assign(input,'c:\\input.txt'); assign(output,'c:\\output.txt'); reset(input); rewrite(output); while not eof do begin

readln(m); writeret(m); end;

close(input); close(output); end. 270

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µ½´óÅÅÐòΪ£ºA1,A2,A3,A4..AN£¬¼ÇÊýÁÐA1,A2,A3,A4..ANµÄÆæÊýÏîÖ®ºÍΪP£¬Å¼ÊýÏîÖ®ºÍΪQ£¬ÁîT=|P-Q| Çó³öTµÄÖµ¡£ ÊäÈë¸ñʽ£º

ÊäÈëÎļþµÄµÚÒ»ÐÐΪÕûÊýN£¨1<=n<=50000£©¡£

½ÓÏÂÀ´µÄNÐÐÿÐÐÓÐÒ»¸öÕûÊý£¬°´Ë³Ðò¸ø³öX1,X2,X3,..XNµÄÖµ£¨|Xi|<=1000£© Êä³ö¸ñʽ£º

Êä³öÕûÊýTµÄÖµ¡£ ÊäÈëÑùÀý£º 3 1 3 2

Êä³öÑùÀý£º 2 var

x:array [1..50000] of integer; n,t,i,q,p:inte ger;

procedure pailie(); var

m,l,t:integer; begin

for m:=n-1 downto 1 do begin

for l:=1 to m do begin

if x[l]>x[l+1] then begin

t:=x[l];

x[l]:=x[l+1]; x[l+1]:=t; end; end; end; end;

procedure add(); begin

p:=0; q:=0;

for i:=1 to n do

begin

if i mod 2=0 then q:=q+x[i] else

p:=p+x[i]; end; end;

begin

assign(input,'c:\\input.txt'); assign(output,'c:\\output.txt'); reset(input); rewrite(output); readln(n);

for i:=1 to n do begin

readln(x[i]); end;

pailie(); add();

if q>p then

write(q-p) else

write(p-q);

close(input);

close(output); End.

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