Tong Hop Bai Tap Luyen Thi Hsg Tinh 2015
-
Upload
tuan-manh-phan -
Category
Documents
-
view
224 -
download
2
description
Transcript of Tong Hop Bai Tap Luyen Thi Hsg Tinh 2015
S N IU
S N IUCc s nguyn dng: 3748, 58, 859, 32435465768 c gi l cc s n iu do nu quan st cc ch s ca cc s ny, ta thy chng lun phin tng gim hoc gim tng. Chng hn:
3 < 7 > 4 < 8 v 3 > 2 < 4 > 3 < 5 > 4 < 6 > 5 < 7 > 6 < 8
S ch c mt ch s l s n iu chiu di 1.
Nhim v:
Vit chng trnh xc nh s ch s u tin ln nht to thnh s n iu ca mt s cho trc.
Tn tp tin chng trnh:
WIGGLE.PAS
D liu:
Cho trong tp tin vn bn WIGGLE.IN, gm mt dng duy nht cha mt s nguyn dng duy nht c khng qu 75 ch s.
Kt qu:
Cho trong tp tin vn bn WIGGLE.OUT, cha mt s nguyn duy nht ch s ch s u tin ln nht to thnh s n iu ca s tng ng trong tp tin d liu.
V d:
WIGGLE.INWIGGLE.OUT
37484
program sdd;
uses crt;
var f1,f2:text;
n,i:longint;
x:string;
ok:boolean;
begin
clrscr;
assign(f1,'qqq.inp');
reset(f1);
assign(f2,'www.out');
rewrite(f2);
readln(f1,n);
str(n,x);
for i:=1 to length(x)-2 do
if (ord(x[i])-ord(x[i+1]))*(ord(x[i+2])-ord(x[i+1]))