鎺掑簭绠楁硶绯诲垪1-鍐掓场鎺掑簭

Posted 2021-04-07 MissKein

• 灞炰簬 姣旇緝绠楁硶 ^[1]
• 鑻辨枃绠€鍐欙細BUB

鍏虫敞銆佽瘎璁恒€佽浆鍙?/span>

瀹氫箟

缁欏畾涓€涓狽涓厓绱犵殑鏁扮粍锛屽啋娉℃硶鎺掑簭灏嗭細

1. 濡傛灉鍏冪礌澶у皬鍏崇郴涓嶆纭紝浜ゆ崲杩欎袱涓暟锛堝湪鏈緥涓负a> b锛夛紝
2. 姣旇緝涓€瀵圭浉閭诲厓绱狅紙a锛宐锛夛紝
3. 閲嶅姝ラ1鍜?锛岀洿鍒版垜浠埌杈炬暟缁勭殑鏈熬锛堟渶鍚庝竴瀵规槸绗紙N-2锛夊拰锛圢-1锛夐」锛屽洜涓烘垜浠殑鏁扮粍浠庨浂寮€濮嬶級
4. 鍒扮洰鍓嶄负姝紝鏈€澶х殑鍏冪礌灏嗗湪鏈€鍚庣殑浣嶇疆銆傜劧鍚庢垜浠皢N鍑忓皯1锛屽苟閲嶅姝ラ1锛岀洿鍒癗 = 1銆?

涓句釜渚嬪瓙馃尠锛歔29,10,14,37,14]
绗竴娆″啋娉★細[10,14,29,14,37]
绗簩娆″啋娉★細[10,14,14,29,37]

鏃堕棿澶嶆潅搴?/span>

锛堟爣鍑嗭級Bubble Sort涓湁涓や釜宓屽寰幆銆傚寰幆姝ｅソ杩愯N娆¤凯浠ｃ€備絾鍐呴儴寰幆杩愯鍙樺緱瓒婃潵瓒婄煭锛?/p>

1. 褰?i = 0锛岋紙N-1锛夋杩唬锛堟瘮杈冨拰鍙兘浜ゆ崲锛夋椂銆?
2. 褰?i = 1锛岋紙N-2锛夋杩唬鏃讹紝...
3. 褰?i =锛圢-2锛夋椂锛?娆¤凯浠?
4. 褰?i=锛圢-1锛夛紝0杩唬. 鍥犳锛屾€昏凯浠ｆ鏁?锛圢-1锛?锛圢-2锛? ... + 1 + 0 = N *锛圢-1锛? 2

鎬绘椂闂? c * N *锛圢-1锛? 2 = O锛圢^2锛?/p>

鍒嗘瀽

鍐掓场鎺掑簭瀹為檯涓婃槸浣庢晥鐨勶紝瀹冪殑 鏃堕棿澶嶆潅搴︿负 O(N^2) 銆?/p>

鎯宠薄涓€涓嬶紝鎴戜滑鏈?N = 106 涓暟瀛椼€傚嵆浣挎垜浠殑璁＄畻鏈洪€熷害瓒呭揩锛屽苟涓斿彲浠ュ湪1绉掑唴璁＄畻108娆℃搷浣滐紝浣嗗啋娉℃帓搴忎粛闇€瑕佸ぇ绾?00绉掓墠鑳藉畬鎴愩€備絾鏄紝瀹冨彲浠ユ彁鍓嶇粓姝紝渚嬪锛?灏濊瘯Bubble Sort涓婇潰鏄剧ず鐨勫皬鍨嬪崌搴忕ず渚媅3,6,11,25,39]锛屽畠鍦∣(N)鏃堕棿缁撴潫銆傛敼杩涚殑鎬濊矾寰堢畝鍗曪細濡傛灉鎴戜滑閫氳繃鍐呴儴寰幆瀹屽叏涓嶄氦鎹紝杩欐剰鍛崇潃鏁扮粍宸茬粡鎺掑簭锛屾垜浠彲浠ュ湪杩欎釜鐐逛笂鍋滄鍐掓场鎺掑簭銆?/p>

璁ㄨ锛氳櫧鐒跺畠浣垮啋娉℃帓搴忓湪涓€鑸儏鍐典笅杩愯寰楁洿蹇紝浣嗚繖绉嶆敼杩涚殑鎯虫硶骞舵病鏈夋敼鍙樺啋娉℃帓搴忕殑 O(N^2) 鏃堕棿澶嶆潅鎬р€︿负浠€涔堬紵

鍙傝€冭祫鏂?/span>

[1]

浠€涔堟槸姣旇緝绠楁硶: 鏄寚鍩轰簬姣旇緝鑰屾瘮杈冿紝鍥犱负瀹冧滑姣旇緝鏁扮粍鐨勫厓绱犲苟鍐冲畾鏄惁浜ゆ崲瀹冧滑銆?/span>