~/algor $ cat masalalar/string-juft-orinlar
String-04
Juft o'rindagi harflar
Muallif:
Iqbolshoh Ilhomjonov
Oson
1000 ms
128 MB
22%
Kichik lotin harflaridan iborat $s$ satr berilgan. Satrning juft o'rindagi harflarini — $2$-, $4$-, $6$- va hokazo (birinchi harf $1$-o'rinda) — ketma-ket yozib chiqaring. Bunday harf bo'lmasa, bo'sh qator chiqaring.
Kiruvchi ma'lumotlar
Bitta qatorda $s$ satri.
Chiquvchi ma'lumotlar
Bitta qatorda hosil bo'lgan satr.
Izoh
$1 \le |s| \le 10^{5}$
$s$ faqat kichik lotin harflaridan (a–z) iborat
Misollar
Kirish #1
algoritm
Chiqish #1
loim
Kirish #2
ab
Chiqish #2
b