NOIP2011
鍒濊禌鎻愰珮缁勭瓟妗堣缁嗚В鏋?/p>
涓�銆佸崟椤归�夋嫨
1
2
3
4
5
6
7
8
9
10
B
B
A
D
B
A
C
D
B
A
浜屻�佸椤归�夋嫨
1
2
3
4
5
6
7
8
9
10
CD
ABCD
AB
BC
BC
ABD
CD
A
BCD
ABC
5. C
鏄樉鐒惰閫夌殑锛屾湰棰樺洜涓烘湁
300+400=700
鐨勬儏鍐碉紝鎵�浠?/p>
B
涔熸槸鍙互鐨勩�?/p>
7
锛庨鍏堣鐭ラ亾閫嗗簭瀵圭殑瀹氫箟锛氬簭鍒?/p>
A[1..n]
閲岋紝瀵逛簬
i<j
鐨?/p>
A[i]>A[j],
鍒欑О
A[i]
涓?/p>
A[j]
涓轰竴瀵归�?/p>
搴忓銆傚皢缁欏畾鐨勫簭鍒椾腑鎵�鏈夐�嗗簭瀵瑰垪鍑烘潵锛岀粺璁″叾涓暟瀛楀彧鍑虹幇杩?/p>
3
娆＄殑銆?/p>
8
锛庨樁鐮佽偗瀹氭槸瑕侀�夌殑锛?/p>
D
杈冮暱鐨勫熬鏁颁篃鏄诞鐐规暟鐨勪竴涓壒鐐癸紝瀹冨彧鏄繚姝ｄ簡娴偣鏁颁竴瀹氱殑
绮惧害锛屽苟涓嶆槸瀹冨彲浠ヨ〃绀哄緢澶ф垨鑰呭緢灏忕殑鏁扮殑鍘熷洜銆?/p>
9
锛庢湰棰樻弿杩版湁鐐瑰惈绯婏紝瀹冪殑鏈剰鍙兘鏄湪璁＄畻
S
鍒?/p>
B
鐐圭殑璺濈鏃跺嚭鐜版湁鍊笺�?/p>
涓夈�侀棶棰樻眰瑙?/p>
1
锛?/p>
9
骞抽潰鍥句腑鐐规暟
n
涓庤竟鏁?/p>
m
涔嬮棿鐨勫叧绯绘槸锛?/p>
m<=3n-6
锛屽綋
n=5
鏃讹紝
m
鐨勬渶澶у�间负
9
銆?/p>
2
锛?/p>
4
姹傚嚭缁欏畾鐨勯暱搴︿负
n
鐨勫瓧绗︿覆鐨勬渶闀夸笂鍗囧簭鍒楃殑闀垮害
m
锛屾渶灏忕殑鎿嶄綔娆℃暟涓?/p>
n-m
銆?/p>
鍥涖�侀槄璇荤▼搴忛
1
锛?/p>
3
鍏堟槸缁熻鍑哄悇涓暟瀛楀嚭鐜扮殑娆℃暟瀛樻斁鍦?/p>
a
鏁扮粍閲岋紝鐒跺悗
I
浠?/p>
1
寮�濮嬬疮鍔?/p>
a[i]
锛岀洿鍒版�绘暟瓒?/p>
杩?/p>
n
鐨勪竴鍗婏紝鏈�鍚庤緭鍑?/p>
i
銆?/p>
2
锛?/p>
1 2 5 13 34
鏂愭尝閭ｅ鏁板垪闂撮殧杈撳嚭
3
锛?/p>
150