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超级水题,1AC,PASCAL代码

Posted by demaxiya at 2012-08-28 09:14:18 on Problem 1658
var
n,a,b,c,d,e,i,j:longint;
re:real;
bb:boolean;
procedure chj(x:integer);
begin
case x of
1:j:=b-a;
2:if j<>c-b then exit;
3:if j<>d-c then exit;
4:begin writeln(j+d);bb:=false; end;
end;
if bb then chj(x+1);
end;
procedure chc(x:integer);
begin
case x of
1:re:=b/a;
2:if re<>c/b then exit;
3:if re<>d/c then exit;
4:begin writeln((re*d):0:0);bb:=false; end;
end;
if bb then chc(x+1);
end;
begin
read(n);
for i:=1 to n do
begin
read(a,b,c,d);
write(a,' ',b,' ',c,' ',d,' ');
bb:=true;
chj(1);
j:=0;
if bb then chc(1);
end;
end.

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