“科大国创杯” 2023年安徽省青少年信息学科普日活动 初中组C++真题答案

?s(score) ?s(score) °¤"5"E' V
|ÄñÊm€ÕKvKl¤s­ªØÜ (sü›b®¿ ???B"
?[ V[??s??s HW?O(nm+nlogn)s ?1:  4: ””(count) ””(count) 5|a??
??a1≤a2≤ · · · ≤ans ­ª»  ¥ô!Pi, j(i < j)
?E?k·K??*?!P·?1?@ k > j, ak< ai+aj
ƒA–^BñuW
PÄ^j+ 1s ?%?i?H?
?"j9v
k?|?uW??99v
?^???
 j9 vH??k?|?uW???' Vs HW?O(n 2 )s ?2:  4: ?<(walk) ?<(walk) 5i'?Q?BHH
?V(1,1)?B??_/_?<B?
?(n, n)?K^s V[5p ŸBHK^
ÂT÷"¥H‚K^°¤{K^' Vb C?5M?BHV (1,1)<?(n, n)?H?? 2n−2¥^å
p÷" ??BHH???K^s ?i?
?T|????ms???H|L
?HL??? (x, y)?@x+y? ?B"
*??HH ??M#?H|L
BH^?B?^V (1,1) 7S
?Q<? /BH|L
B?<?(n, n)s *¹¿BH$÷"¥H
°¤» îµõñ]Bª­W¥H Ÿ}9ñ' Vb HW?O(n 2 +q)s ?3:  4: F0(stone) F0(stone) 5 Inl=r¥f ƒ
'óçBñÄ
ÄQ_P_·†i¥Kl½nb ￾¹€ In
ÂTÎÀµ†i¥ÄÏ
Kl´ü’-X܆i¥uW¥PH ??H
*B??5?i???Kl?s ŒÂTKl´‚ñ¥PH€·H;
$ 1ÂKl´ñ¥PH
’Kl´·H¥Ä$†i­ª
/B„Bç^|ƒñKl ??i ?s ?^?? V[?Kl????H?? ? A?B??
y???B?^??"B ?i?s *??"-?i?uW?? ???????i ?H
!? ???????? x?
*?{n ??^ x×?iuW?ai??F? ??????=??D
' |??B?B??i ?
??? ai?3?Ds ? ????W9^ V[ ˻ aiB"
1 ￾/áÌ¿v­-X†i Ÿ¥5 ª¨½¥b1 ñ† Ÿ¥Äx, y?^1?x5?i?K???n?y5?i? K???ns ??????Tx=??ai¥Ü (´ l
*¹x5?i???s?H?TyP H^x
S?y??H
*?? V[|x, y?i ?
y??iy??B? ? Y? ixs ¿^¿SÄPH¥Ä
VPª·áiO»¹Bñ\bÄQFBñÄž\ä
Â T\??? (?v?\?/B??? (?
??\??\?/B??i ?s ?S??H??
V??P??S??s ƒ" In